Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (Mayo Clin Proc 1993;68:221-40)
Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells.
Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.
Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)
A method of recording heart motion and internal structures by combining ultrasonic imaging with exercise testing (EXERCISE TEST) or pharmacologic stress.
Echocardiography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Changes in the observed frequency of waves (as sound, light, or radio waves) due to the relative motion of source and observer. The effect was named for the 19th century Austrian physicist Johann Christian Doppler.
Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
A catecholamine derivative with specificity for BETA-1 ADRENERGIC RECEPTORS. It is commonly used as a cardiotonic agent after CARDIAC SURGERY and during DOBUTAMINE STRESS ECHOCARDIOGRAPHY.
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
The valve between the left atrium and left ventricle of the heart.
A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.
The lower right and left chambers of the heart. The right ventricle pumps venous BLOOD into the LUNGS and the left ventricle pumps oxygenated blood into the systemic arterial circulation.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
Post-systolic relaxation of the HEART, especially the HEART VENTRICLES.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Period of contraction of the HEART, especially of the HEART VENTRICLES.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
Pathological conditions involving the HEART including its structural and functional abnormalities.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Backflow of blood from the LEFT VENTRICLE into the LEFT ATRIUM due to imperfect closure of the MITRAL VALVE. This can lead to mitral valve regurgitation.
The chambers of the heart, to which the BLOOD returns from the circulation.
Developmental abnormalities in any portion of the ATRIAL SEPTUM resulting in abnormal communications between the two upper chambers of the heart. Classification of atrial septal defects is based on location of the communication and types of incomplete fusion of atrial septa with the ENDOCARDIAL CUSHIONS in the fetal heart. They include ostium primum, ostium secundum, sinus venosus, and coronary sinus defects.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
Contractile activity of the MYOCARDIUM.
Pathological conditions involving any of the various HEART VALVES and the associated structures (PAPILLARY MUSCLES and CHORDAE TENDINEAE).
The visualization of tissues during pregnancy through recording of the echoes of ultrasonic waves directed into the body. The procedure may be applied with reference to the mother or the fetus and with reference to organs or the detection of maternal or fetal disease.
The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart (HEART/embryology) only on the basis of time.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.
The circulation of blood through the CORONARY VESSELS of the HEART.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
Substances used to allow enhanced visualization of tissues.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
The valve between the left ventricle and the ascending aorta which prevents backflow into the left ventricle.
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
Backflow of blood from the RIGHT VENTRICLE into the RIGHT ATRIUM due to imperfect closure of the TRICUSPID VALVE.
Tumors in any part of the heart. They include primary cardiac tumors and metastatic tumors to the heart. Their interference with normal cardiac functions can cause a wide variety of symptoms including HEART FAILURE; CARDIAC ARRHYTHMIAS; or EMBOLISM.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Agents that have a strengthening effect on the heart or that can increase cardiac output. They may be CARDIAC GLYCOSIDES; SYMPATHOMIMETICS; or other drugs. They are used after MYOCARDIAL INFARCT; CARDIAC SURGICAL PROCEDURES; in SHOCK; or in congestive heart failure (HEART FAILURE).
Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (Mayo Clin Proc 1993;68:221-40)
The valve consisting of three cusps situated between the right atrium and right ventricle of the heart.
This structure includes the thin muscular atrial septum between the two HEART ATRIA, and the thick muscular ventricular septum between the two HEART VENTRICLES.
A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.
A device that substitutes for a heart valve. It may be composed of biological material (BIOPROSTHESIS) and/or synthetic material.
A method of non-invasive, continuous measurement of MICROCIRCULATION. The technique is based on the values of the DOPPLER EFFECT of low-power laser light scattered randomly by static structures and moving tissue particulates.
The hemodynamic and electrophysiological action of the right HEART VENTRICLE.
The hemodynamic and electrophysiological action of the LEFT ATRIUM.
Enlargement of the LEFT VENTRICLE of the heart. This increase in ventricular mass is attributed to sustained abnormal pressure or volume loads and is a contributor to cardiovascular morbidity and mortality.
The hollow, muscular organ that maintains the circulation of the blood.
Narrowing of the passage through the MITRAL VALVE due to FIBROSIS, and CALCINOSIS in the leaflets and chordal areas. This elevates the left atrial pressure which, in turn, raises pulmonary venous and capillary pressure leading to bouts of DYSPNEA and TACHYCARDIA during physical exertion. RHEUMATIC FEVER is its primary cause.
A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
A condition in which the RIGHT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE or MYOCARDIAL INFARCTION, and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the right ventricular wall.
The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the cardiac cycle. The amount of blood ejected from a ventricle at each beat is STROKE VOLUME.
Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.
Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752)
Abnormal protrusion or billowing of one or both of the leaflets of MITRAL VALVE into the LEFT ATRIUM during SYSTOLE. This allows the backflow of blood into left atrium leading to MITRAL VALVE INSUFFICIENCY; SYSTOLIC MURMURS; or CARDIAC ARRHYTHMIA.
The geometric and structural changes that the HEART VENTRICLES undergo, usually following MYOCARDIAL INFARCTION. It comprises expansion of the infarct and dilatation of the healthy ventricle segments. While most prevalent in the left ventricle, it can also occur in the right ventricle.
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
Heart sounds caused by vibrations resulting from the flow of blood through the heart. Heart murmurs can be examined by HEART AUSCULTATION, and analyzed by their intensity (6 grades), duration, timing (systolic, diastolic, or continuous), location, transmission, and quality (musical, vibratory, blowing, etc).
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY).
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
Fluid accumulation within the PERICARDIUM. Serous effusions are associated with pericardial diseases. Hemopericardium is associated with trauma. Lipid-containing effusion (chylopericardium) results from leakage of THORACIC DUCT. Severe cases can lead to CARDIAC TAMPONADE.
Developmental abnormalities in any portion of the VENTRICULAR SEPTUM resulting in abnormal communications between the two lower chambers of the heart. Classification of ventricular septal defects is based on location of the communication, such as perimembranous, inlet, outlet (infundibular), central muscular, marginal muscular, or apical muscular defect.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.
The flow of BLOOD through or around an organ or region of the body.
The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.
Specialized arterial vessels in the umbilical cord. They carry waste and deoxygenated blood from the FETUS to the mother via the PLACENTA. In humans, there are usually two umbilical arteries but sometimes one.
A form of CARDIAC MUSCLE disease that is characterized by ventricular dilation, VENTRICULAR DYSFUNCTION, and HEART FAILURE. Risk factors include SMOKING; ALCOHOL DRINKING; HYPERTENSION; INFECTION; PREGNANCY; and mutations in the LMNA gene encoding LAMIN TYPE A, a NUCLEAR LAMINA protein.
PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.
Elements of limited time intervals, contributing to particular results or situations.
Surgical insertion of synthetic material to repair injured or diseased heart valves.
Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.
Increased VASCULAR RESISTANCE in the PULMONARY CIRCULATION, usually secondary to HEART DISEASES or LUNG DISEASES.
The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
Surgery performed on the heart.
Examinations used to diagnose and treat heart conditions.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
A localized bulging or dilatation in the muscle wall of a heart (MYOCARDIUM), usually in the LEFT VENTRICLE. Blood-filled aneurysms are dangerous because they may burst. Fibrous aneurysms interfere with the heart function through the loss of contractility. True aneurysm is bound by the vessel wall or cardiac wall. False aneurysms are HEMATOMA caused by myocardial rupture.
The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.
Ear-shaped appendage of either atrium of the heart. (Dorland, 28th ed)
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Graphic registration of the heart sounds picked up as vibrations and transformed by a piezoelectric crystal microphone into a varying electrical output according to the stresses imposed by the sound waves. The electrical output is amplified by a stethograph amplifier and recorded by a device incorporated into the electrocardiograph or by a multichannel recording machine.
A benign neoplasm derived from connective tissue, consisting chiefly of polyhedral and stellate cells that are loosely embedded in a soft mucoid matrix, thereby resembling primitive mesenchymal tissue. It occurs frequently intramuscularly where it may be mistaken for a sarcoma. It appears also in the jaws and the skin. (From Stedman, 25th ed)
Blocking of a blood vessel by an embolus which can be a blood clot or other undissolved material in the blood stream.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).
Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.
The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
A condition in which the FORAMEN OVALE in the ATRIAL SEPTUM fails to close shortly after birth. This results in abnormal communications between the two upper chambers of the heart. An isolated patent ovale foramen without other structural heart defects is usually of no hemodynamic significance.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
The hemodynamic and electrophysiological action of the HEART VENTRICLES.
A condition in which HEART VENTRICLES exhibit impaired function.
Formation and development of a thrombus or blood clot in the blood vessel.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
A PEPTIDE that is secreted by the BRAIN and the HEART ATRIA, stored mainly in cardiac ventricular MYOCARDIUM. It can cause NATRIURESIS; DIURESIS; VASODILATION; and inhibits secretion of RENIN and ALDOSTERONE. It improves heart function. It contains 32 AMINO ACIDS.
The pressure within a CARDIAC VENTRICLE. Ventricular pressure waveforms can be measured in the beating heart by catheterization or estimated using imaging techniques (e.g., DOPPLER ECHOCARDIOGRAPHY). The information is useful in evaluating the function of the MYOCARDIUM; CARDIAC VALVES; and PERICARDIUM, particularly with simultaneous measurement of other (e.g., aortic or atrial) pressures.
Patient care procedures performed during the operation that are ancillary to the actual surgery. It includes monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and laboratory tests.
The tendinous cords that connect each cusp of the two atrioventricular HEART VALVES to appropriate PAPILLARY MUSCLES in the HEART VENTRICLES, preventing the valves from reversing themselves when the ventricles contract.
Prolonged dysfunction of the myocardium after a brief episode of severe ischemia, with gradual return of contractile activity.
Inflammation of the inner lining of the heart (ENDOCARDIUM), the continuous membrane lining the four chambers and HEART VALVES. It is often caused by microorganisms including bacteria, viruses, fungi, and rickettsiae. Left untreated, endocarditis can damage heart valves and become life-threatening.
The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization.
Flaps of tissue that prevent regurgitation of BLOOD from the HEART VENTRICLES to the HEART ATRIA or from the PULMONARY ARTERIES or AORTA to the ventricles.
The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The veins and arteries of the HEART.
Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.
The span of viability of a tissue or an organ.
A valve situated at the entrance to the pulmonary trunk from the right ventricle.
Occlusion of the outflow tract in either the LEFT VENTRICLE or the RIGHT VENTRICLE of the heart. This may result from CONGENITAL HEART DEFECTS, predisposing heart diseases, complications of surgery, or HEART NEOPLASMS.
Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.
The hemodynamic and electrophysiological action of the RIGHT ATRIUM.
Motion pictures of the passage of contrast medium through blood vessels.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Abnormalities in any part of the HEART SEPTUM resulting in abnormal communication between the left and the right chambers of the heart. The abnormal blood flow inside the heart may be caused by defects in the ATRIAL SEPTUM, the VENTRICULAR SEPTUM, or both.
Compression of the heart by accumulated fluid (PERICARDIAL EFFUSION) or blood (HEMOPERICARDIUM) in the PERICARDIUM surrounding the heart. The affected cardiac functions and CARDIAC OUTPUT can range from minimal to total hemodynamic collapse.
Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.
Inflammation of the ENDOCARDIUM caused by BACTERIA that entered the bloodstream. The strains of bacteria vary with predisposing factors, such as CONGENITAL HEART DEFECTS; HEART VALVE DISEASES; HEART VALVE PROSTHESIS IMPLANTATION; or intravenous drug use.
An infant during the first month after birth.
The muscular membranous segment between the PHARYNX and the STOMACH in the UPPER GASTROINTESTINAL TRACT.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Cardiac manifestation of systemic rheumatological conditions, such as RHEUMATIC FEVER. Rheumatic heart disease can involve any part the heart, most often the HEART VALVES and the ENDOCARDIUM.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
Measurement of blood flow based on induction at one point of the circulation of a known change in the intravascular heat content of flowing blood and detection of the resultant change in temperature at a point downstream.
Drugs used to cause dilation of the blood vessels.
The circulation of BLOOD, of both the mother and the FETUS, through the PLACENTA.
The blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.
The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.
Placement of a balloon-tipped catheter into the pulmonary artery through the antecubital, subclavian, and sometimes the femoral vein. It is used to measure pulmonary artery pressure and pulmonary artery wedge pressure which reflects left atrial pressure and left ventricular end-diastolic pressure. The catheter is threaded into the right atrium, the balloon is inflated and the catheter follows the blood flow through the tricuspid valve into the right ventricle and out into the pulmonary artery.
Studies determining the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. For drugs and devices, CLINICAL TRIALS AS TOPIC; DRUG EVALUATION; and DRUG EVALUATION, PRECLINICAL are available.
A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo MRI sequence with retrospective ECG-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualized.
A congenital heart defect characterized by the persistent opening of fetal DUCTUS ARTERIOSUS that connects the PULMONARY ARTERY to the descending aorta (AORTA, DESCENDING) allowing unoxygenated blood to bypass the lung and flow to the PLACENTA. Normally, the ductus is closed shortly after birth.
Pathological processes involving any part of the AORTA.
Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment.
Blocking of a blood vessel in the SKULL by an EMBOLUS which can be a blood clot (THROMBUS) or other undissolved material in the blood stream. Most emboli are of cardiac origin and are associated with HEART DISEASES. Other non-cardiac sources of emboli are usually associated with VASCULAR DISEASES.
A versatile contrast medium used for DIAGNOSTIC X-RAY RADIOLOGY.
A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.
Radiography of blood vessels after injection of a contrast medium.
A combination of congenital heart defects consisting of four key features including VENTRICULAR SEPTAL DEFECTS; PULMONARY STENOSIS; RIGHT VENTRICULAR HYPERTROPHY; and a dextro-positioned AORTA. In this condition, blood from both ventricles (oxygen-rich and oxygen-poor) is pumped into the body often causing CYANOSIS.
The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
Heart failure caused by abnormal myocardial relaxation during DIASTOLE leading to defective cardiac filling.
Blockage of an artery due to passage of a clot (THROMBUS) from a systemic vein to a systemic artery without its passing through the lung which acts as a filter to remove blood clots from entering the arterial circulation. Paradoxical embolism occurs when there is a defect that allows a clot to cross directly from the right to the left side of the heart as in the cases of ATRIAL SEPTAL DEFECTS or open FORAMEN OVALE. Once in the arterial circulation, a clot can travel to the brain, block an artery, and cause a STROKE.
Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.
The failure of a FETUS to attain its expected FETAL GROWTH at any GESTATIONAL AGE.
Motion picture study of successive images appearing on a fluoroscopic screen.
Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
General or unspecified injuries to the heart.
The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.
Backflow of blood from the PULMONARY ARTERY into the RIGHT VENTRICLE due to imperfect closure of the PULMONARY VALVE.
Inflammation of the PERICARDIUM that is characterized by the fibrous scarring and adhesion of both serous layers, the VISCERAL PERICARDIUM and the PARIETAL PERICARDIUM leading to the loss of pericardial cavity. The thickened pericardium severely restricts cardiac filling. Clinical signs include FATIGUE, muscle wasting, and WEIGHT LOSS.
The period during a surgical operation.
Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Blocking of a blood vessel by air bubbles that enter the circulatory system, usually after TRAUMA; surgical procedures, or changes in atmospheric pressure.
The largest of the cerebral arteries. It trifurcates into temporal, frontal, and parietal branches supplying blood to most of the parenchyma of these lobes in the CEREBRAL CORTEX. These are the areas involved in motor, sensory, and speech activities.
The main trunk of the systemic arteries.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
The circulation of the BLOOD through the LUNGS.
The vessels carrying blood away from the heart.
The condition of an anatomical structure's being dilated beyond normal dimensions.
The pathologic narrowing of the orifice of the PULMONARY VALVE. This lesion restricts blood outflow from the RIGHT VENTRICLE to the PULMONARY ARTERY. When the trileaflet valve is fused into an imperforate membrane, the blockage is complete.
A congenital cardiovascular malformation in which the AORTA arises entirely from the RIGHT VENTRICLE, and the PULMONARY ARTERY arises from the LEFT VENTRICLE. Consequently, the pulmonary and the systemic circulations are parallel and not sequential, so that the venous return from the peripheral circulation is re-circulated by the right ventricle via aorta to the systemic circulation without being oxygenated in the lungs. This is a potentially lethal form of heart disease in newborns and infants.
The circulation of the BLOOD through the MICROVASCULAR NETWORK.
The dilatation of the aortic wall behind each of the cusps of the aortic valve.
A CATHETER-delivered implant used for closing abnormal holes in the cardiovascular system, especially HEART SEPTAL DEFECTS; or passageways intentionally made during cardiovascular surgical procedures.
The heart rate of the FETUS. The normal range at term is between 120 and 160 beats per minute.
Embolism or thrombosis involving blood vessels which supply intracranial structures. Emboli may originate from extracranial or intracranial sources. Thrombosis may occur in arterial or venous structures.
Prosthesis, usually heart valve, composed of biological material and whose durability depends upon the stability of the material after pretreatment, rather than regeneration by host cell ingrowth. Durability is achieved 1, mechanically by the interposition of a cloth, usually polytetrafluoroethylene, between the host and the graft, and 2, chemically by stabilization of the tissue by intermolecular linking, usually with glutaraldehyde, after removal of antigenic components, or the use of reconstituted and restructured biopolymers.
A birth defect characterized by the narrowing of the AORTA that can be of varying degree and at any point from the transverse arch to the iliac bifurcation. Aortic coarctation causes arterial HYPERTENSION before the point of narrowing and arterial HYPOTENSION beyond the narrowed portion.
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.
An abnormal balloon- or sac-like dilatation in the wall of AORTA.
A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.
A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.
Small encapsulated gas bubbles (diameters of micrometers) that can be used as CONTRAST MEDIA, and in other diagnostic and therapeutic applications. Upon exposure to sufficiently intense ultrasound, microbubbles will cavitate, rupture, disappear, release gas content. Such characteristics of the microbubbles can be used to enhance diagnostic tests, dissolve blood clots, and deliver drugs or genes for therapy.
Radiography of the heart and great vessels after injection of a contrast medium.
Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.
Imaging of a ventricle of the heart after the injection of a radioactive contrast medium. The technique is less invasive than cardiac catheterization and is used to assess ventricular function.
The circulation of blood through the BLOOD VESSELS of the BRAIN.

Frequency and long term follow up of valvar insufficiency caused by retrograde aortic radiofrequency catheter ablation procedures. (1/2917)

OBJECTIVE: To assess the frequency of valvar complications caused by left sided radiofrequency catheter ablation using the retrograde aortic technique. METHODS: 179 patients (118 male) with a mean (SD) age of 43 (17) years underwent 216 procedures at one centre. The target of the ablation was an accessory atrioventricular pathway in 144 patients, the atrioventricular junction in 29 patients, and a ventricular tachycardia in six patients. In 25 patients structural heart disease was identified before the procedure (ischaemic heart disease 10, cardiomyopathy nine, valvar three, other three). Echo/Doppler examinations were performed the day before the procedure and within 24 hours postablation; the investigations were all reviewed by the same investigator. Patients with identified valvar injury caused by the procedure were followed for 42 (7) months. RESULTS: Valvar injury caused by the ablation procedure was identified in four young (age 30 (8) years), otherwise healthy patients with left lateral atrioventricular accessory pathways. Mild mitral insufficiency with a central regurgitation jet was detected in two patients and remained unchanged at follow up. Mild aortic insufficiency was detected in another two patients. In one of these the regurgitation jet was central and remained unchanged at follow up. In one patient the regurgitation jet was located between the non-coronary and left cusps in relation to a loosely attached structure. Both the structure and the valvar regurgitation disappeared during follow up. No clinical complications occurred in any of the patients during follow up. CONCLUSION: In this study, the frequency of valvar complications after left sided radiofrequency catheter ablation using the retrograde aortic technique was 1.9%.  (+info)

Echo derived variables predicting exercise tolerance in patients with dilated and poorly functioning left ventricle. (2/2917)

OBJECTIVE: To determine whether resting echo derived measurements predict exercise tolerance and its interrelation with heart rate response and ventilation drive in patients with systolic left ventricular disease. DESIGN: Prospective echocardiographic examination followed by cardiopulmonary exercise testing. SETTING: A tertiary referral centre for cardiac diseases. SUBJECTS: 21 patients (11 with coronary artery disease, 10 with idiopathic dilated cardiomyopathy) with end diastolic dimension > 6.4 cm, shortening fraction < 25%, and in sinus rhythm. There were 11 age matched normal controls. RESULTS: In the patients, peak oxygen consumption (mVo2) correlated with right ventricular long axis excursion (r = 0.62); 65% of the variance in mVo2 was predictable using a multivariate model with right ventricular long axis excursion and peak lengthening rate, and peak mitral atrial filling velocity as independent variables. Aetiology was not an independent predictor, although the right ventricular long axis excursion (mean (SD)) was greater in patients with idiopathic dilated cardiomyopathy than in those with coronary artery disease (2.4 (0.5) cm v 1.6 (0.5) cm, p < 0.001). Peak heart rate correlated with duration of mitral regurgitation (r = -0.52) and the slope of ventilation against CO2 production correlated with M mode isovolumic relaxation time (r = 0.61). CONCLUSIONS: In patients with systolic left ventricular dysfunction, more than half the variance in exercise tolerance can be predicted by factors measured on echocardiography at rest, particularly right ventricular long axis excursion.  (+info)

Extent and severity of atherosclerotic involvement of the aortic valve and root in familial hypercholesterolaemia. (3/2917)

OBJECTIVE: To compare the frequency of valvar and supravalvar aortic stenosis in homozygous and heterozygous familial hypercholesterolaemia (FH). DESIGN: Analysis of life time cholesterol exposure and prevalence of aortic atherosclerosis in 84 consecutive cases attending a lipid clinic. SETTING: A tertiary referral centre in London. PATIENTS: Outpatients with FH (six homozygous, 78 heterozygous). INTERVENTIONS: Maintenance of lipid lowering treatment. MAIN OUTCOME MEASURES: Calculated cholesterol x years score (CYS) and echocardiographic measurement of aortic root diameter, aortic valve thickness, and transaortic gradient. RESULTS: Four homozygotes with a mean (SD) CYS of 387 (124) mmol/1 x years had severe aortic stenosis (treatment started after seven years of age), whereas the other two had echocardiographic evidence of supravalvar thickening but no aortic valve stenosis (treatment started before three years of age). On multivariate analysis, mean transaortic gradient correlated significantly with CYS (mean = 523 (175) mmol/1 x years) in heterozygotes (p = 0.0001), but only two had severe aortic valve and root involvement. CONCLUSIONS: In patients with familial hypercholesterolaemia, aortic stenosis is common in homozygotes, and aortic root involvement is always present despite the lower CYS than in heterozygotes. It appears to be determined by short term exposure to high cholesterol concentrations in early life. Conversely, aortic root and valve involvement are rare in heterozygotes and occur only with severe, prolonged hypercholesterolaemia, possibly accelerating age related degenerative effects.  (+info)

Results of three to 10 year follow up of balloon dilatation of the pulmonary valve. (4/2917)

BACKGROUND: The results of immediate and short term follow up of balloon dilatation of the pulmonary valve have been well documented, but there is limited information on long term follow up. OBJECTIVE: To evaluate the results of three to 10 year follow up of balloon dilatation of the pulmonary valve in children and adolescents. SETTING: Tertiary care centre/university hospital. DESIGN: Retrospective study. METHODS AND RESULTS: 85 patients (aged between 1 day and 20 years, mean (SD) 7.0 (6.4) years) underwent balloon dilatation of the pulmonary valve during an 11 year period ending August 1994. There was a resultant reduction in the peak to peak gradient from 87 (38) to 26 (22) mm Hg. Immediate surgical intervention was not required. Residual gradients of 29 (17) mm Hg were measured by catheterisation (n = 47) and echo Doppler (n = 82) at intermediate term follow up (two years). When individual results were scrutinised, nine of 82 patients had restenosis, defined as a peak gradient of 50 mm Hg or more. Seven of these patients underwent repeat balloon dilatation of the pulmonary valve: peak gradients were reduced from 89 (40) to 38 (20) mm Hg. Clinical evaluation and echo Doppler data of 80 patients showed that residual peak instantaneous Doppler gradients were 17 (15) mm Hg at long term follow up (three to 10 years, median seven), with evidence for late restenosis in one patient (1.3%). Surgical intervention was necessary to relieve fixed infundibular stenosis in three patients and supravalvar pulmonary stenosis in one. Repeat balloon dilatation was performed to relieve restenosis in two patients. Actuarial reintervention free rates at one, two, five, and 10 years were 94%, 89%, 88%, and 84%, respectively. Pulmonary valve regurgitation was noted in 70 of 80 patients at late follow up, but neither right ventricular dilatation nor paradoxical interventricular septal motion developed. CONCLUSIONS: The results of late follow up of balloon dilatation of the pulmonary valve are excellent. Repeat balloon dilatation was performed in 11% of patients and surgical intervention for subvalvlar or supravalvar stenosis in 5%. Most patients had mild residual pulmonary regurgitation but right ventricular volume overload was not required. Balloon dilatation is the treatment of choice in the management of moderate to severe stenosis of the pulmonary valve. Further follow up studies should be undertaken to evaluate the significance of residual pulmonary regurgitation.  (+info)

Pulmonary embolism: one-year follow-up with echocardiography doppler and five-year survival analysis. (5/2917)

BACKGROUND: The long-term prognosis for patients with pulmonary embolism (PE) is dependent on the underlying disease, degree of pulmonary hypertension (PH), and degree of right ventricular (RV) dysfunction. A precise description of the time course of pulmonary artery pressure (PAsP)/RV function is therefore of importance for the early identification of persistent PH/RV dysfunction in patients treated for acute PE. Other objectives were to identify variables associated with persistent PH/RV dysfunction and to analyze the 5-year survival rate for patients alive 1 month after inclusion. METHODS AND RESULTS: Echocardiography Doppler was performed in 78 patients with acute PE at the time of diagnosis and repeatedly during the next year. A 5-year survival analysis was made. The PAsP decreased exponentially until the beginning of a stable phase, which was 50 mm Hg at the time of diagnosis of acute PE was associated with persistent PH after 1 year. The 5-year mortality rate was associated with underlying disease. Only patients with persistent PH in the stable phase required pulmonary thromboendarterectomy within 5 years. CONCLUSIONS: An echocardiography Doppler investigation performed 6 weeks after diagnosis of acute PE can identify patients with persistent PH/RV dysfunction and may be of value in planning the follow-up and care of these patients.  (+info)

Ventriculo-atrial time interval measured on M mode echocardiography: a determining element in diagnosis, treatment, and prognosis of fetal supraventricular tachycardia. (6/2917)

OBJECTIVE: To determine whether M mode echocardiography can differentiate fetal supraventricular tachycardia according to the ventriculo-atrial (VA) time interval, and if the resulting division into short and long VA intervals holds any relation with clinical presentation, management, and fetal outcome. DESIGN: Retrospective case series. SUBJECTS: 23 fetuses with supraventricular tachycardia. MAIN OUTCOME MEASURES: A systematic review of the M mode echocardiograms (for VA and atrioventricular (AV) interval measurements), clinical profile, and final outcome. RESULTS: 19 fetuses (82.6%) had supraventricular tachycardia of the short VA type (mean (SD) VA/AV ratio 0.34 (0.16); heart rate 231 (29) beats/min). Tachycardia was sustained in six and intermittent in 13. Hydrops was present in three (15.7%). Digoxin, the first drug given in 14, failed to control tachycardia in five. Three of these then received sotalol and converted to sinus rhythm. All fetuses of this group survived. Postnatally, supraventricular tachycardia recurred in three, two having Wolff-Parkinson-White syndrome. Four fetuses (17.4%) had long VA tachycardia (VA/AV ratio 3.89 (0.82); heart rate 226 (10) beats/min). Initial treatment with digoxin was ineffective in all, but sotalol was effective in two. Heart failure caused fetal death in one and premature delivery in one. All three surviving fetuses had recurrences of supraventricular tachycardia after birth: two had the permanent form of junctional reciprocating tachycardia and one had atrial ectopic tachycardia. CONCLUSIONS: Careful measurement of ventriculo-atrial intervals on fetal M mode echocardiography can be used to distinguish short from long VA supraventricular tachycardia and may be helpful in optimising management. Digoxin, when indicated, may remain the drug of choice in the short VA type but appears ineffective in the long VA type.  (+info)

Ventricular excitation maps using tissue Doppler acceleration imaging: potential clinical application. (7/2917)

OBJECTIVES: The purpose of this study is to validate the use of tissue Doppler acceleration imaging (TDAI) for evaluation of the onset of ventricular contraction in humans. BACKGROUND: Tissue Doppler acceleration imaging can display the distribution, direction and value of ventricular acceleration responses to myocardial contraction and electrical excitation. METHODS: Twenty normal volunteers underwent TDAI testing to determine the normal onset of ventricular acceleration. Two patients with paroxysmal supraventricular tachycardia and 30 patients with permanent pacemakers underwent introduction of esophageal and right ventricular pacing electrodes, respectively, and were studied to visualize the onset of pacer-induced ventricular acceleration. Eight patients with dual atrioventricular (AV) node and 20 patients with Wolff-Parkinson-White (WPW) syndrome underwent TDAI testing to localize the abnormal onset of ventricular acceleration, and the results were compared with those of intracardiac electrophysiology (ICEP) tests. RESULTS: The normal onset and the onset of dual AV node were localized at the upper interventricular septum (IVS) under the right coronary cusp within 25 ms before the beginning of the R wave in the electrocardiogram (ECG). In all patients in the pacing group, the location and timing of the onset conformed to the positions and timing of electrodes (100%). In patients with WPW syndrome, abnormal onset was localized to portions of the ventricular wall other than the upper IVS at the delta wave or within 25 ms after the delta wave in the ECG. The agreement was 90% (18 of 20) between the abnormal onset and the position of the accessory pathways determined by ICEP testing. CONCLUSIONS: These results suggest that TDAI is a useful noninvasive method that frequently is successful in visualizing the intramural site of origin of ventricular mechanical contraction.  (+info)

Abnormal flow-mediated epicardial vasomotion in human coronary arteries is improved by angiotensin-converting enzyme inhibition: a potential role of bradykinin. (8/2917)

OBJECTIVES: This study was performed to determine whether angiotensin converting enzyme (ACE) inhibition improves endothelium-dependent flow-mediated vasodilation in patients with atherosclerosis or its risk factors and whether this is mediated by enhanced bradykinin activity. BACKGROUND: Abnormal coronary vasomotion due to endothelial dysfunction contributes to myocardial ischemia in patients with atherosclerosis, and its reversal may have an antiischemic action. Previous studies have shown that ACE inhibition improves coronary endothelial responses to acetylcholine, but whether this is accompanied by improved responses to shear stress remains unknown. METHODS: In 19 patients with mild atherosclerosis, metabolic vasodilation was assessed during cardiac pacing. Pacing was repeated during separate intracoronary infusions of low-dose bradykinin (BK) and enalaprilat. Endothelium-dependent and -independent vasodilation was estimated with intracoronary BK and sodium nitroprusside respectively. RESULTS: Enalaprilat did not alter either resting coronary vascular tone or dilation with sodium nitroprusside, but potentiated BK-mediated dilation. Epicardial segments that constricted abnormally with pacing (-5+/-1%) dilated (3+/-2%) with pacing in the presence of enalaprilat (p = 0.002). Similarly, BK at a concentration (62.5 ng/min) that did not alter resting diameter in the constricting segments also improved the abnormal response to a 6+/-1% dilation (p < 0.001). Cardiac pacing-induced reduction in coronary vascular resistance of 27+/-4% (p < 0.001) remained unchanged after enalaprilat. CONCLUSIONS: Thus ACE inhibition: A) selectively improved endothelium-dependent but not-independent dilation, and B) abolished abnormal flow-mediated epicardial vasomotion in patients with endothelial dysfunction, in part, by increasing endogenous BK activity.  (+info)

OBJECTIVE--To study the prevalence and the characteristics of physiological valve regurgitation. DESIGN--Pulsed wave Doppler echocardiography, continuous wave Doppler echocardiography and Doppler colour flow mapping were performed prospectively in healthy volunteers. SETTING--Echocardiography laboratory in a city hospital. PATIENTS--32 consecutive healthy volunteers (age 21-49 years, mean age 29.4). MAIN OUTCOME MEASURES--Identification of regurgitation with colour Doppler flow mapping and measurement of the jet area, jet length, and maximal velocity of the regurgitation. RESULTS--Regurgitation was recorded at the pulmonary (100%), tricuspid (100%), mitral (56%), and aortic valves (6%). The velocity of pulmonary and tricuspid regurgitation was similar to that predicted from the pressure gradient calculated from the Bernoulli equation. The jet area and jet length were generally small. CONCLUSION--Trivial regurgitation from the pulmonary, tricuspid, and mitral valves is common in healthy people. ...
TY - JOUR. T1 - Clinical determinants of elevated systolic pulmonary artery pressure measured by transthoracic Doppler echocardiography in early systemic sclerosis. AU - EUSTAR co-authors. AU - Carreira, Patricia E.. AU - Carmona, Loreto. AU - Joven, Beatriz E.. AU - Loza, Estibaliz. AU - Andreu, José Luis. AU - Riemekasten, Gabriela. AU - Vettori, Serena. AU - Allanore, Yannick. AU - Balbir-Gurman, Alexandra. AU - Airò, Paolo. AU - Walker, Ulrich A.. AU - Damjanov, Nemanja. AU - Ananieva, Lidia P.. AU - Rednic, Simona. AU - Czirják, L.. AU - Distler, Oliver. AU - Farge, Dominique. AU - Hesselstrand, Roger. AU - Corrado, Ada. AU - Caramaschi, Paola. AU - Tikly, Mohammed. AU - Matucci-Cerinic, Marco. PY - 2017/1/1. Y1 - 2017/1/1. N2 - Objective. To explore the prevalence and clinical associations of elevated systolic pulmonary artery pressure (sPAP), measured by Transthoracic Dopplerechocardiography (TTE) in patients with early systemic sclerosis (SSc). Methods. A cross-sectional analysis of ...
Doppler echocardiographic evaluation of patients with porcine mitral valves.: The application of Doppler echocardiography to the study of valvular function has
TY - JOUR. T1 - Role of Doppler echocardiography in coronary artery disease. AU - Kaul, S.. PY - 1991/1/1. Y1 - 1991/1/1. N2 - Doppler echocardiography can have a major role in the evaluation of patients with coronary artery disease. This review deals with the imaging planes in relation to coronary vascular territories and the role of Doppler echocardiography in evaluating patients with acute and chronic ischemic syndromes.. AB - Doppler echocardiography can have a major role in the evaluation of patients with coronary artery disease. This review deals with the imaging planes in relation to coronary vascular territories and the role of Doppler echocardiography in evaluating patients with acute and chronic ischemic syndromes.. UR - http://www.scopus.com/inward/record.url?scp=0026069737&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0026069737&partnerID=8YFLogxK. U2 - 10.1177/088506669100600503. DO - 10.1177/088506669100600503. M3 - Review article. C2 - 10149576. AN - ...
Practical Quantitative Doppler Echocardiography by John H Phillips starting at $73.41. Practical Quantitative Doppler Echocardiography has 1 available editions to buy at Alibris
TY - JOUR. T1 - Performance of two-dimensional Doppler echocardiography for the assessment of infarct size and left ventricular function in rats. AU - Nozawa, E.. AU - Takeuchi, Rosemeire. AU - Murad, N.. AU - Carvalho, A. C C. AU - Cravo, S. L D. AU - Campos, O.. AU - Tucci, P. J F. AU - Moises, V. A.. PY - 2006/5. Y1 - 2006/5. N2 - Although echocardiography has been used in rats, few studies have determined its efficacy for estimating myocardial infarct size. Our objective was to estimate the myocardial infarct size, and to evaluate anatomic and functional variables of the left ventricle. Myocardial infarction was produced in 43 female Wistar rats by ligature of the left coronary artery. Echocardiography was performed 5 weeks later to measure left ventricular diameter and transverse area (mean of 3 transverse planes), infarct size (percentage of the arc with infarct on 3 transverse planes), systolic function by the change in fractional area, and diastolic function by mitral inflow parameters. ...
Top Doppler-Echocardiography by RS Medical System in Kolar Road Bhopal, List of Best Doppler-Echocardiography with Photos Price & Offers in Kolar Road Bhopal by RS Medical System , Doppler-Echocardiography under Products & Services RS Medical System
TY - JOUR. T1 - Progression of aortic stenosis in adults. T2 - Newappraisal using doppler echocardiography. AU - Roger, Veronique L.. AU - Tajik, A. Jamil. AU - Bailey, Kent R.. AU - Oh, Jae K.. AU - Taylor, Catherine L.. AU - Seward, James B.. PY - 1990/2. Y1 - 1990/2. N2 - This study examined progression of aortic stenosis (AS) as assessed by Doppler echocardiography. One hundred twelve consecutive adult patients had calcific AS and underwent three examinations during a mean 25-month period (range 7 to 54 months). At the time of entry into the study, mean values for initial peak aortic velocity and ejection fraction (EF) were 2.9±0.7 m/sec and 63±10%, respectively; 52% of the patients were symptomatic. At the third examination the percentage of symptomatic patients increased to 65% (p=0.0039 compared to baseline values), and the aortic peak velocity increased to 3.3±0.8 m/sec (p,0.001). Age, sex, and EF were not predictors of progression. Documented coronary artery disease (in 57 patients) ...
Background- Restrictive mitral filling pattern (RFP), the most severe form of diastolic dysfunction, is a predictor of outcome after acute myocardial infarction (AMI). Low power has precluded a definite conclusion on the independent importance of RFP, especially when overall systolic function is preserved. We undertook an individual patient meta-analysis to determine whether RFP is predictive of mortality independently of LV ejection fraction (LVEF), end-systolic volume index, and Killip class in patients after AMI.. Methods and Results- Twelve prospective studies (3396 patients) assessing the relationship between prognosis and Doppler echocardiographic LV filling pattern in patients after AMI were included. Individual patient data from each study were extracted and collated into a single database for analysis. RFP was associated with higher all-cause mortality (hazard ratio, 2.67; 95% CI, 2.23 to 3.20; P,0.001) and remained an independent predictor in multivariate analysis with age, gender, and ...
Doppler Echocardiography in Infancy and Childhood auf frohberg.de - This book covers the full range of Doppler echocardiography in infants and children,...
Apical ballooning syndrome (ABS) and obstructive coronary artery disease of the left anterior descending coronary artery (LAD) can both result in similar left ventricular apical wall motion abnormalities. The right ventricle may more likely be involv
Aliasing is associated only with pulsed Doppler, it never appears with continuous wave Doppler. A standard continuous wave Doppler has a receiver and a transmitter. The transmitter produces continuous sound waves which the receiver collects. Both elements are positioned at specific angles from one another enabling the receiver to receive reflected ultrasound waves.. The disadvantage of using a continuous wave Doppler is the range ambiguity. With this technique, velocities along the entire region of overlap between the transmit and receive beams, blend together to form the spectrum. With pulsed Doppler, velocities from blood within the sample volume are measured.. Eliminating aliasing improves the ability to measure the maximum velocity with Doppler.. ...
Renal dysfunction is associated with a variety of cardiac alterations including left ventricular (LV) hypertrophy, LV dilation, and reduction in systolic and diastolic function. It is common and associated with an increased mortality risk in heart failure (HF) patients. This study was designed to evaluate whether severe diastolic dysfunction contribute to the increased mortality risk observed in HF patients with renal dysfunction ...
BACKGROUND AND AIM: QRS amplitude and duration are associated with increased left ventricular (LV) volume, mass and dysfunction. However, the diagnostic concordance between QRS measurements and LV morphology and function, as shown by Doppler echocardiography, is not well established. We investigated the relationships of QRS duration and amplitude with echocardiographic measurements of LV morphology and systolic and diastolic function in normal individuals. METHODS: Individuals without signs or symptoms of coronary artery disease or heart failure, who underwent clinical examination as a part of a cross-sectional survey for the prevalence of coronary risk factors, randomly selected from the population list in Caltanissetta, Italy, were included in the study ...
A total of 38 patients (mean age 62 ± 14 years, 71% men, 57% with New York Heart Association class , 2) with suspected CA underwent electrocardiography (ECG), TTE (including tissue Doppler), DHE-CMR (Siemens 1.5 T scanner, Erlangen, Germany) and EMB between 1/05 and 4/08. Low voltage on ECG was defined as sum of S wave in lead V1 + R wave in lead V5 or V6 , 15 mm. Measured TTE parameters included left atrial size, interventricular septal thickness, speckled appearance, E/A ratio, E/E ratio, stage of diastology, deceleration time (msec) and myocardial performance index [(isovolumic contraction time + isovolumic relaxation time)/ejection time]. DHE-MR images were obtained in standard long and short axis orientations (covering the entire LV), after injection of Gadolinium dimenglumine using an inversion recovery spoiled gradient echo sequence: TE 4 msec, TR 8 msec, flip angle 30°, bandwidth 140 Hz/pixel, 23 k-space lines acquired every other RR-interval, field of view (varied from 228-330 in the ...
Introduction: Disturbances of diastolic function precede systolic heart failure and, although clinically silent, represent the earliest sign of cardiac involvement. Diastolic dysfunction (DD) is associated with age, female, and hypertension.. Hypothesis: However, little is known about the age-specific incidence rates and risk factors for diastolic dysfunction in patients with rheumatoid arthritis (RA).. Methods: We used standard two-dimensional/Doppler echocardiography to screen for the presence of diastolic dysfunction in 61 patients with RA and 107 healthy subjects. All participants were premenopausal women without a history of hypertension and with preserved ejection fraction. DD was defined as impaired relaxation with or without increased filling pressures.. Results: The two groups were similar with respect to age (48.1±7.9 years vs 47.3±9.4 years, P=0.269). Patients with RA had significantly higher left ventricular (LV) mass index and LV filling pressure than controls. DD was more common ...
Cardiovascular Diagnosis by Ultrasound: Transesophageal, Computerized, Contrast, Doppler Echocardiography by Peter Hanrath full download exe or rar online without authorization for free.
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
Ecografía Doppler (es); Échographie Doppler (fr); Доплерография (ru); Farbkodierte Doppler-Sonografie (de); Siêu âm Doppler (vi); اکوکاردیوگرافی دوپلر (fa); 多普勒超聲 (zh); ドップラー心エコー (ja); USG dopplerowskie (pl); duplexonderzoek (nl); 多普勒超聲 (zh-hant); Ecografía Doppler (gl); Ecografia Doppler (it); Doppler echocardiography (en); الدوبلر الطبي (ar); 多普勒超声 (zh-hans); Ecografia Doppler (ca) tecnica non cruenta e non invasiva quindi facilmente ripetibile utilizzata in medicina per lo studio della situazione anatomica e funzionale dei vasi sanguigni, arteriosi e venosi, e del cuore in tempo reale (it); ultrasound procedure to examine the heart or blood vessels (en); Form der Ultraschalluntersuchung (de); Examen médical. (fr) Ecodoppler, Ecografia doppler, EcoDoppler, Ecocolor Doppler, Ecocolordoppler (it); échographie vasculaire, échographie Doppler vasculaire, échocardiographie-doppler (fr); ...
TY - JOUR. T1 - Fetal Doppler echocardiography. AU - Reed, Kathryn L. PY - 1989. Y1 - 1989. UR - http://www.scopus.com/inward/record.url?scp=0024827199&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0024827199&partnerID=8YFLogxK. U2 - 10.1097/00003081-198912000-00014. DO - 10.1097/00003081-198912000-00014. M3 - Article. C2 - 2692908. AN - SCOPUS:0024827199. VL - 32. SP - 728. EP - 737. JO - Clinical Obstetrics and Gynecology. JF - Clinical Obstetrics and Gynecology. SN - 0009-9201. IS - 4. ER - ...
In patients with type 1 diabetes mellitus (T1DM) imaging studies have demonstrated an increased prevalence of left ventricular diastolic dysfunction and increased left ventricular mass (LVM) unrelated to arterial hypertension and ischemic heart disease. The aim of our study was to identify potential predictors of early subclinical changes in cardiac chamber size and function in such patients. Sixty-one middle-aged asymptomatic normotensive patients with T1DM were included in the study. Conventional and tissue Doppler echocardiography was performed and fasting serum levels of glucose, glycated hemoglobin (HbA1c), lipids, and creatinine were measured. We found moderate bivariate correlations of body mass index (BMI) with left atrial volume (r = 0.47, p , 0.01), LVM (r = 0.42, p , 0.01), left ventricular relative wall thickness (r = 0.32, p = 0.01), and all observed parameters of diastolic function of both ventricles. The five-year average value of HbA1c weakly correlated with the Doppler index of ...
Tissue Doppler imaging and strain rate imaging are quantitative methods for assessing myocardial function and have been shown to overcome the limitations of current ultrasound methods in assessing the complex changes in regional myocardial function that occur in differing ischemic substrates. Tissue Doppler imaging (TDI) measures in real time the myocardial velocity gradient which is an index of myocardial deformation. Strain and strain rate (SR) imaging has been shown to be a sensitive technique for quantifying regional myocardial deformation. Strain rate is less load-dependent that strain and provides therefore a better measure of contractility. In the setting of ischemia, experimental studies have shown that strain imaging was an accurate method for quantitative evaluation of regional myocardial function and may yield important physiological data. In myocardial infarction, transmural extension of scar distribution in the infarct zone is proportionally related to the reduction in systolic ...
article: Chemotherapy-induced cardiotoxicity: role of the conventional echocardiography and the Tissue Doppler - Minerva Cardioangiologica 2011 August;59(4):301-8 - Minerva Medica - Journals
An echo Doppler is a medical test used to detect the size, shape, and motion of the heart. Doctors often order an echo Doppler if...
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In hypertensive patients the propensity to develop organ damage is under the influence of several factors, including the existence of a prothrombotic state. We tested the hypothesis that an activated hemostatic system is associated with left-ventricu
Recommendations for Evaluation of Prosthetic Valves With Echocardiography and Doppler Ultrasound [document url="http://asecho.org/wordpress/wp-con...
Summarised by Dr David Bell. Singh GK, et al. Effect of Pressure Recovery on Pressure Gradients in Congenital Stenotic Outflow Lesions in Pediatric Patients-Clinical Implications of Lesion Severity and Geometry: A Simultaneous Doppler Echocardiography and Cardiac Catheter Correlative Study. J Am Soc Echocardiogr. 2019 Nov 4.. Severity of stenotic lesions is often determined by Doppler pressure gradients (DPG) as a surrogate for a catheter determined gradient. However suboptimal agreement between Doppler and catheter gradients exists. This study examined the occurrence of clinically significant recovered pressure (RP) in AS, PS, and CoA by assessing simultaneous DPG and catheter peak-to-peak gradient (PPG) in 82 patients both before and after correcting for RP. RP was calculated from a fluid dynamic-based equation. Recovered pressure corrected Doppler peak instantaneous gradient (PIG) had significantly closer agreement and correlation with the catheter PPG than the uncorrected PIG and mean ...
One of the major criticisms of ultrasound Doppler is its angle dependency, that is its ability to measure velocity components directly to or from the transducer only. The present article aims to investigate the impact of this angular error in a clinical setting. Apical two- and four-chamber views were recorded in 43 individuals, and the myocardium was marked by hand in each image. We assume that the main direction of the myocardial velocities is longitudinal and correct for the angular error by backprojecting measured velocities onto the longitudinal direction drawn. Strain was calculated from both corrected and uncorrected velocities in 12 segments for each individual. The results indicate that the difference between strain values calculated from corrected and uncorrected velocities is insignificant in 5 segments and within a decimal range in 11 segments. The biggest difference between measured and corrected strain values was found in the apical segments. Strain is also found to be more robust ...
Among the 51 patients (34 males, aged 54 ± 14 years) who received ECMO for medical (n = 27), postcardiotomy (n = 11), or posttransplantation (n = 5) cardiogenic shock, 38 tolerated at least one ECMO flow reduction trial and 20 were ultimately weaned. Compared with the 13 patients who tolerated the trial but were not deemed weanable, those successfully weaned had, at each ECMO flow level, higher arterial systolic and pulse pressures, VTI, LVEF, and lateral mitral annulus peak systolic velocity (TDSa). All weaned patients had aortic VTI ≥10 cm, LVEF ,20-25%, and TDSa ≥6 cm/s at minimal ECMO flow support. These Doppler echocardiography parameters better separated weaned and nonweaned patients than any other parameters tested.. ...
After disrobing from the waist up, you will be given a gown and asked to lie down on an exam table. Electrodes are attached to your chest for an electrocardiogram (ECG) at the same time. The ECG helps with the interpretation of the echocardiogram and evaluating the electrical impulses in the heart. The lights will be dimmed so the technician can see your hearts image on the screen more clearly. The Doppler echocardiogram uses colors to indicate the varying speed of your blood as it flows through the heart. The technician spreads gel on your chest and then firmly presses the transducer against your skin, aiming the ultrasound beam through your chest. You may be asked to breathe in a certain way or to roll over onto one side. The transducer uses high-frequency sound waves, which are beyond the range of normal hearing. However, you may hear a pulsing whoosh sound, which is the machines approximation of blood flowing past the structures in your heart. The computer then uses the information from ...
second) was identified as the highest velocity produced after the onset of velocity. Acceleration (in degree per second squared) was calculated as the linear slope of the velocity-time curve (Δvelocity/Δtime) from velocity onset to 2 deg/s below the PV attained. The onset of velocity was defined as 2 deg. ...
Objective: To evaluate the value of two-dimensional strain rate imaging (STE) in detecting the alteration of regionally left ventricular long-axis sys..
In this study we sought to assess the clinical significance of peak negative MVG derived from TDI as a noninvasive indicator of LV diastolic function. By comparing peak negative MVG among patients with or without impairment of systolic and diastolic performance, we have demonstrated that peak negative MVG reflected diastolic abnormalities in these patients. We have also found that peak negative MVG was relatively independent of preload alterations because peak negative MVG was unaltered, while the transmitral flow velocity indices were significantly altered, by passive leg lifting maneuver. Finally, we have found that peak negative MVG showed an improvement by volume-reducing therapy in contrast to the transmitral flow velocity indices, which apparently worsened toward an abnormal relaxation pattern. Thus, peak negative MVG may be a noninvasive indicator of LV diastolic function that is relatively independent of preload alterations, and thereby could be used for the follow-up of patients with ...
Atrial fibrillation (AF) is the most frequent form of arrhythmia, and the number of patients with AF has increased with the rapid aging of society (1). AF is an important risk factor for heart failure (2), wherein left ventricular (LV) diastolic function is more closely related to the symptoms, exercise tolerance, and prognosis of patients compared with systolic function (3,4). In the clinical setting, LV diastolic function is mainly evaluated by the transmitral flow velocity pattern using Doppler echocardiography. Evaluation of LV diastolic function is also needed in patients with AF which is extremely challenging because of the lack of atrial systolic transmitral flow wave and the irregularity of Doppler parameters caused by irregular R-R intervals (5-7).. As an alternative method for evaluating LV diastolic function, mitral annular velocity waveforms, which can be recorded using tissue Doppler echocardiography, have been used. The ratio of early diastolic transmitral flow velocity (E) to ...
Doppler echocardiography was used to evaluate blood flow in the pulmonary artery in 14 patients 2 to 42 months (mean (SD) 17 (12) months) after a modified Fontan operation incorporating a direct atriopulmonary anastomosis. Preoperatively six patients had tricuspid atresia, six had a double inlet left ventricle, and two had pulmonary atresia with an intact ventricular septum. The postoperative rhythm was sinus in 11 patients, junctional in one, ventricular pacing in one, and atrioventricular sequential pacing in one. In one patient the Doppler trace was unsatisfactory for analysis. In all patients forward flow in the pulmonary artery had biphasic peaks related to both atrial and ventricular contraction. The mean (SD) peak flow velocity that was synchronous with atrial contraction was 80 (30) cm/s and that synchronous with ventricular contraction was 74 (23) cm/s. The atrial contribution to total pulmonary artery flow, assessed by velocity-time integrals, varied between 22% and 73% (mean (SD) 45 ...
Four hundred and eighty paired recordings obtained from 16 patients (55 +/- 10 yrs; 10 men, 6 women) were analyzed to determine the reproducibility of both acquiring and measuring myocardial velocities recorded by tissue Doppler echocardiography. To assess intraobserver variability, 1 observer recor …
TY - JOUR. T1 - Accuracy of cardiac output estimation with biplane transesophageal echocardiography.. AU - Hozumi, T.. AU - Shakudo, M.. AU - Applegate, Richard Lee. AU - Shah, P. M.. PY - 1993/1. Y1 - 1993/1. N2 - To evaluate the accuracy of cardiac output measurements with biplane transesophageal Doppler echocardiography, we examined 26 sets of observations in 14 patients using thermodilution technique as the standard. A mitral inflow method by single-plane combined the time-velocity integral of mitral inflow at the mitral annulus with the area of mitral annulus, assuming it to be a circular shape, by use of either the four- or the two-chamber view. With both views, a mitral inflow method by biplane combined the average of time-velocity integral of mitral inflow from the four- and the two-chamber views with the area of mitral annulus, assuming it to be an ellipsoid shape. The correlation coefficients between thermodilution and single-plane method of cardiac output were 0.81 (SEE = 0.72 L/min) ...
TY - JOUR. T1 - The Prognostic Value of Pulmonary Vascular Capacitance Determined by Doppler Echocardiography in Patients with Pulmonary Arterial Hypertension. AU - Mahapatra, Srijoy. AU - Nishimura, Rick A.. AU - Oh, Jae Kuen. AU - McGoon, Michael D.. PY - 2006/8. Y1 - 2006/8. N2 - Objectives: We sought to determine if a novel measurement of pulmonary vascular (PV) capacitance (PVCAP) by Doppler echocardiography predicts all-cause mortality in patients with primary pulmonary arterial (PA) hypertension (PPAH). Background: The prognosis of patients with PPAH is variable and has been difficult to predict using clinical or hemodynamic parameters. PVCAP is a measure of the workload on the right ventricle (RV) and we recently have shown that PVCAP determined by cardiac catheterization is a strong predictor of survival. This same hemodynamic information to calculate PVCAP can be derived from Doppler echocardiography. Therefore, the purpose of this study was to determine if PVCAP from noninvasive ...
TY - JOUR. T1 - Effect of preload and heart rate on the Doppler and tissue Doppler-derived myocardial performance index. AU - Özdemir, Kurtuluş. AU - Balci, Sibel. AU - Duzenli, Mehmet Akif. AU - Can, Ilknur. AU - Yazici, Mehmet. AU - Aygul, Nazif. AU - Altunkeser, Bulent Behlul. AU - Altintepe, Lutfullah. AU - Turk, Suleyman. PY - 2007/7. Y1 - 2007/7. N2 - Doppler-derived myocardial performance index (MPI) has been described as a noninvasive measurement of LV function. Our aim was to investigate the effect of hemodialysis related volume reduction and heart rate changes on the Doppler-derived LV MPI, and Doppler tissue imaging (DTI) derived left and right ventricular MPI. Method: The study group comprised 32 consecutive patients (mean age: 43 ± 18 yrs) undergoing hemodialysis. Patients underwent echocardiography before and immediately after hemodialysis session. Left and right ventricular MPI derived from conventional pulsed-wave Doppler and DTI was calculated. The difference in MPI, heart ...
Thirty adult patients with aortic stenosis had Doppler echocardiography within 1 day of cardiac catheterization. Noninvasive measurement of the mean transaortic pressure gradient was calculated by applying the simplified Bernoulli equation to the continuous wave Doppler transaortic velocity recording. Stroke volume was measured noninvasively by multiplying the systolic velocity integral of flow in the left ventricular outflow tract (obtained by pulsed Doppler ultrasonography) by the cross-sectional area of the left ventricular outflow tract (measured by two-dimensional echocardiography). Non-invasive measurement of aortic valve area was calculated by two methods. In method 1, the Gorlin equation was applied using Doppler-derived mean pressure gradient, cardiac output and systolic ejection period. Method 2 used the continuity equation. These noninvasive measurements were compared with invasive measurements using linear regression analysis, and mean pressure gradients correlated well (r = 0.92). ...
TY - JOUR. T1 - Usefulness of tissue doppler and color M-mode indexes of left ventricular diastolic function in predicting outcomes in systolic left ventricular heart failure (from the ADEPT Study). AU - Troughton, Richard W.. AU - Prior, David L.. AU - Frampton, Christopher M.. AU - Nash, Patrick J.. AU - Pereira, Jeremy J.. AU - Martin, Maureen. AU - Fogarty, Annette. AU - Morehead, Annitta J.. AU - Starling, Randall C.. AU - Young, James B.. AU - Thomas, James D.. AU - Lauer, Michael S.. AU - Klein, Allan L.. PY - 2005/7/15. Y1 - 2005/7/15. N2 - The prognostic values of tissue Doppler imaging and color M-mode diastolic indexes were studied in 225 patients who had symptomatic systolic heart failure in the ADEPT study. The primary end point of death, transplantation, or hospitalization due to heart failure occurred in 65 patients and was independently predicted by shorter deceleration time, lower ratio of pulmonary vein systolic to diastolic velocity, and increasing levels of the ratios of ...
This manual introduces the extraordinary diagnostic possibilities of Transesophageal Color Doppler Echocardiography and therefore enables readers to recognize and diagnose a wide range of heart diseases.The atlas covers a comprehensive collection ofMoreThis manual introduces the extraordinary diagnostic possibilities of Transesophageal Color Doppler Echocardiography and therefore enables readers to recognize and diagnose a wide range of heart diseases.The atlas covers a comprehensive collection of cardiac pathology, selected from routine perioperative examinations.. A CD-ROM will also be available, offering more than 160 movies of examinations and covering all important heart diseases such as abnormalities of the valves. ...
title: Left atrial function assessed with Doppler echocardiography rather than left atrial volume predicts recurrence in patients with paroxysmal atrial fibrillation, doi: none, category: Thesis
Pulmonary arterial pressure (PAP) represents an important prognostic factor in patients affected by chronic obstructive pulmonary disease (COPD). A noninvasive diagnostic approach is offered by several imaging techniques, such as chest X-ray, nuclear medicine, real-time sonography, color Doppler US, CT and MRI. However, at present a quantitative assessment of PAP is not achieved with reasonable precision with any of these techniques. Tricuspid regurgitation can be estimated by continuous wave Doppler but it may be difficult in patients with COPD. On the contrary, the severity of pulmonary hypertension can be accurately assessed with pulsed Doppler echocardiography from the subxiphoid region, using a general purpose US device. Nineteen adult patients with COPD were studied by duplex-Doppler from an oblique subxiphoid approach and right heart catheterization. The study was diagnostic in all cases with quality Doppler recordings. A significant relationship was found between AcT and pulmonary mean or
TY - JOUR. T1 - Estimation of pulmonary capillary wedge pressure in heart transplants-A new application for Doppler tissue imaging. AU - Sundereswaran, Lalhha. AU - Nagueh, Sherif. AU - Amione-Torre, Guillermo. AU - Vardan, Sandeep. AU - Middleton, Katherine J.. AU - Zoghbi, William A.. AU - Quiñones, Miguel A.. PY - 1997/12/1. Y1 - 1997/12/1. N2 - To date, right heart catheterization (RHC) is the only available method for measuring left ventricular filling pressures in heart transplants, given the unreliable results obtained thus far with the current Doppler methods. Doppler tissue imaging (DTI) is a new technique that permits the evaluation of myocardial relaxation, thus allowing correction for the influence of relaxation on peak early mitral flow velocity (E) Accordingly, we prospectively evaluated 22 patients (20 males) with simultaneous RHC and Doppler echocardiography. Their mean age was 53±17 and their left ventricular ejection fraction was 55±12.6 (23% to 67%). The transmitral flow ...
In a number of patients with EF 60% or more, signs of heart failure are clinically detected. As a rule, such a condition is caused by LV diastolic dysfunction (impaired relaxation processes due to ischemia, cardiosclerosis, hypertrophy of the walls, pericardial effusion, etc.). According to a number of researchers, patients with signs of heart failure caused only by diastolic dysfunction constitute 15-25% of all patients with HF.. Diastolic dysfunction of the LV is estimated according to the results of a study of transmitral diastolic blood flow in a pulsed mode. Determine: 1. the maximum speed of the early peak of the diastolic filling M1, 2. the maximum speed in the atrial systole M2, 3. the integral of speed (area under the curve) of the early diastolic filling (VTI E), 4. the integral of the speed of atrial systole (VTI A), 5 LV isovolumetric relaxation time (IVRT), 6. time to slow the early diastolic filling (DT).. In the early stages of LV diastolic dysfunction with a slight increase in ...
Left atrial volume (LAV) provides the significant prognostic information in the general population and patients with heart disease, including acute myocardial infarction, left ventricular dysfunction, mitral regurgitation, cardiomyopathy and atrial fibrillation. Large left atrial volume, which represents chronic diastolic dysfunction, is associated with poor outcome, regardless of systolic function. Thereby, LAV provides a long-term view of whether or not the patient has the disease of diastolic dysfunction, regardless of whatever loading conditions are present at the time of the examination, as the hemoglobin A1C in diabetes. However, whether left atrial (LA) parameters could correlate with LVFP and reflect short-term change in left ventricular filling pressure(LVFP) remains unknown. Only one article of our team confirmed the relationship between LAV and LVFP in patients with severe mitral regurgitation by simultaneous echocardiography-catheterization. The prior report proposed a new parameter, ...
TY - JOUR. T1 - Cardiac MRI is an important complementary tool to Doppler echocardiography in the management of patients with pulmonary regurgitation. AU - Sorrell, Vincent L.. AU - Altbach, Maria I.. AU - Kudithipudi, Vijayasree. AU - Squire, Scott W.. AU - Goldberg, Stan J.. AU - Klewer, Scott E.. PY - 2007/3/1. Y1 - 2007/3/1. N2 - Cardiac MRI (CMR) is a noninvasive diagnostic tool with comprehensive capabilities similar to that of two-dimensional echocardiography with Doppler. In addition to the ability to evaluate the etiology and severity of pulmonary valve regurgitation (PR), CMR is well designed to serially monitor the impact of the PR on the right ventricle (RV). Importantly, RV dilation and dysfunction is a critical determinate to time surgical intervention. CMR gives the silent RV, suffering from PR, a voice.. AB - Cardiac MRI (CMR) is a noninvasive diagnostic tool with comprehensive capabilities similar to that of two-dimensional echocardiography with Doppler. In addition to the ...
TY - JOUR. T1 - Impact of ventricular dyssynchrony on postexercise accommodation of systolic myocardial motion in hypertensive patients with heart failure and a normal ejection fraction. T2 - A tissue-Doppler echocardiography study. AU - Wang, Yi Chih. AU - Yu, Chih Chieh. AU - Chiu, Fu Chun. AU - Klepfer, Ruth. AU - Hilpisch, Kathryn. AU - Splett, Vincent. AU - Tsai, Chia Ti. AU - Lai, Ling Ping. AU - Hwang, Juey Jen. AU - Lin, Jiunn Lee. PY - 2012/2/1. Y1 - 2012/2/1. N2 - Background: We hypothesized left ventricular (LV) dyssynchrony would affect postexercise accommodation of regional myocardial motion in patients with heart failure and a normal ejection fraction (HFNEF). Methods and Results: Tissue-Doppler echocardiography was studied in 100 hypertensive patients with LV ejection fraction ,50%. Among them, 70 HFNEF patients were classified into the systolic dyssynchrony (Dys: ,65 ms difference of electromechanical delay between septal and lateral segments) (43 patients) and nondyssynchrony ...
Objective: To determine the efficacy of using echocardiography, compared with cardiac catheterization, to diagnose elevated left ventricular filling pressure (LVFP), according to the 2016 American Society of Echocardiography and the European Association of Cardiovascular Imaging (ASE/EACVI) recommendations, among patients with at least one coronary
Echocardiographic Workshop on 2-D and Doppler Echocardiography at Vail is a cardiovascular CME conference that will provide a comprehensive review of state-of-the-art 2-D, Doppler and transesophageal echocardiography with a strong emphasis on newer and more rapidly changing areas. Find more cardiology conferences here!
Chemical Engineering Assignment Help, bernoulli equations, air flows through apipe at arte of 200L/S. The pipe of two sections of diameters 20cm and 10cm with asmoth reducing section the pressure are difference between the two pipe section is measured by awater manometer . Neglecting Frictional effects dete
TY - JOUR. T1 - Tissue Doppler imaging of the fetal heart. AU - Paladini, D.. AU - Lamberti, A.. AU - Teodoro, A.. AU - Arienzo, M.. AU - Tartaglione, A.. AU - Martinelli, P.. PY - 2000. Y1 - 2000. N2 - Objectives: The objectives of this study were: (i) to assess the feasibility of a tissue Doppler imaging (TDI) evaluation in the fetus, (ii) to identify color-TDI patterns consistent with the various phases of the cardiac cycle; and (iii) to assess myocardial velocities and the myocardial velocity gradient. Methods: Eighty-nine normal fetuses between the 17th and the 37th week of gestation were studied. Color-TDI was superimposed on an apical four-chamber view of the fetal heart and three cardiac cycles captured in cine-loop format. By reviewing the cine-loop strip, color patterns consistent with the various phases of the cardiac cycle were identified. The procedure was then repeated with a transverse four-chamber view. On each frame corresponding to mid-systole, early and late diastole, ...
Citation: Mohamed R. Morsi , Evidence of valve regurgitation by doppler echocardiography in patients with rheumatic fever without clinical carditis, Alex. J. Pediatr. 1994; 8 (3): 341-6 ...
Standard apical 2- and 4-chamber views were obtained. LV end-systolic and end-diastolic volumes were obtained by planimetry with the biplane method of discs as described (9). The LVEF was calculated as (end-diastolic volume − end-systolic volume)/end-diastolic volume.. Left and right atrial volumes were obtained at end-ventricular systole by manual planimetry with the biplane method of discs for the left atrium and single plane method of discs for the right atrium, as previously described and validated (10). All chamber volumes were subsequently indexed to body surface area.. LV mass was calculated with a truncated ellipsoid equation and indexed to body surface area as previously described and validated (9,11).. The tricuspid regurgitation jet was visualized with color flow mapping, and continuous wave Doppler was used to capture the flow signal from measurement of peak tricuspid regurgitant velocity. The peak tricuspid regurgitant velocity for the current study was the highest measurement ...
BACKGROUND: Myocardial dysfunction in children diagnosed with mitochondrial disease is an ominous sign and has been associated with substantial increased mortality rates. Early detection of cardiac involvement would therefore be desirable. Two dimensional strain echocardiography (2DSTE) has proven to be more sensitive than conventional echocardiography for the detection of early myocardial dysfunction in various (cardiac) conditions. AIMS: To determine left ventricular systolic function in children with mitochondrial disorders by means of physical examination, electrocardiography (ECG), conventional echocardiography and 2DSTE. METHODS: A total of 27 children with established mitochondrial disease and 54 age-matched control subjects underwent cardiac evaluation. Longitudinal, circumferential and radial peak systolic strain (S) values were determined as well as peak systolic strain rate (Sr) and the time to peak global systolic strain (T2P). One Way analysis of Variance was performed to assess the ...
TY - JOUR. T1 - Diastolic dysfunction and Doppler echocardiography [1] (multiple letters). AU - Sanderson, John E.. AU - Maurer, Mathew. AU - Spevack, Daniel. AU - Burkhoff, Daniel. AU - Kronzon, Itzhak. N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.. PY - 2005/6/21. Y1 - 2005/6/21. UR - http://www.scopus.com/inward/record.url?scp=20444454325&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=20444454325&partnerID=8YFLogxK. U2 - 10.1016/j.jacc.2005.03.022. DO - 10.1016/j.jacc.2005.03.022. M3 - Letter. C2 - 15963415. AN - SCOPUS:20444454325. VL - 45. SP - 2095. JO - Journal of the American College of Cardiology. JF - Journal of the American College of Cardiology. SN - 0735-1097. IS - 12. ER - ...
Doppler echocardiography is a fundamental instrument to understand heart damage during essential arterial hypertension. Left ventricular (LV) hypertrophy may also be conveniently studied in its morphological and functional aspects by ultrasound application. Echocardiography can also provide important morphological and functional information in hypertensive patients for therapeutic management and prognostic stratification. In recent years, echocardiography has been enriched by very refined techniques that are capable of studying the physiopathological intramyocardial phenomena: (i) tissue Doppler (which studies intramyocardial velocities and time intervals and allows the analysis of strain and strain rate); (ii) integrated backscatter (which analyzes variations of myocardial reflectivity in decibels); (iii) transthoracic Doppler derived coronary flow reserve (which quantifies the vasodilator response of coronary velocities to a hyperaemic stimulation); (iv) myocardial echo-contrast- ...
The extent to which Doppler echocardiography information can be used in the assessment of prosthesis hemodynamic performance is still controversial. The goals of our study were to assess the importance of valve design and size both on Doppler echocardiography findings and on pressure recovery in a fluid mechanics model. We performed Doppler and catheter measurements in the different orifices of the bileaflet St Jude (central and side orifices), the monoleaflet Omnicarbon (major and minor orifices), and the stented Biocor porcine prosthesis. Net pressure gradients were predicted from Doppler flow velocities, assuming either independence or dependence of valve size. The peak Doppler estimated gradients (mean +/- SD for sizes 21 to 27) were 21 +/- 10.3 mm Hg for St Jude, 18 +/- 9.3 mm Hg for Omnicarbon, and 37 +/- 14.5 mm Hg for Biocor (P ,.05 for St Jude and Omnicarbon vs Biocor). The pressure recovery (proportion of peak catheter pressure) was 53% +/- 8.6% for central-St Jude, 29% +/- 8. 9% for ...
TY - JOUR. T1 - Isolated Left Ventricular Filling Abnormalities May Predict Interleukin-2-Induced Cardiovascular Toxicity. AU - Citterio, G.. AU - Fragasso, G.. AU - Rossetti, E.. AU - Di Lucca, G.. AU - Bucci, E.. AU - Foppoli, M.. AU - Guerrieri, R.. AU - Matteucci, P.. AU - Polastri, D.. AU - Scaglietti, U.. AU - Tresoldi, M.. AU - Chierchia, S. L.. AU - Rugarli, C.. PY - 1996. Y1 - 1996. N2 - Interleukin-2 (IL-2) is a cytokine with proven activity against metastatic renal cell carcinoma (RCC) and malignant melanoma (MM). The intravenous administration of high-dose IL-2 is limited by important cardiovascular side effects such as hypotension, fluid retention, arrhythmias, and myocardial chemia, which often cause dose reduction and/or treatment withdrawal. The occurrence of these toxic events is not predicted by routine pretreatment examinations. The aim of the present study was to test the reliability of serial echocardiography in predicting subsequent cardiac adverse effects in patients ...
Read about how non-invasive Doppler echocardiography is useful in detecting pulmonary hypertension in patients with interstitial lung disease.
The aim of this study was to: (1) compare the usefulness, in clinical practice, of different echocardiographic methods of left ventricular (LV) function determination in patients with a recent thrombolytic-treated acute myocardial infarction (AMI); (2) compare these measurements with the reference m …
The ability of pulsed Doppler echocardiography to identify patients with left ventricular systolic dysfunction was evaluated in 12 patients with dilated (congestive) cardiomyopathy. A range-gated, spectrum analyzer-based Doppler velocimeter was used to record blood flow velocity in the ascending aorta and main pulmonary artery. The following blood flow velocity parameters were measured or derived: peak flow velocity, acceleration time, average acceleration, deceleration time, average deceleration, ejection time, and aortic flow velocity integral. Doppler blood flow velocity data in the cardiomyopathy patients were compared to data from 20 normal subjects. Measurements from the ascending aorta revealed that peak aortic flow velocity discriminated between cardiomyopathy patients (mean 47 cm/sec, range 35 to 62) and normal subjects (mean 92 cm/sec, range 72 to 120) with no overlap in data (p , 0.001). Aortic flow velocity integral was also able to separate the patients with dilated cardiomyopathy ...
Background:Inconsistencies between gradients and aortic valve area are frequent in the echocardiographic evaluation of aortic stenosis (AS). Assessing AS severity is essential for the correct management of the disease. The aim of this study was to evaluate whether ejection dynamics, particularly acc
Nardi F. Echocardiographic methods integrated in the context of multimodality imaging. Minerva Cardioangiol 2017;65:577-8. DOI: 10.23736/S0026-4725.17.04481-4 ...
Medicine Journal in MJB authors are : Ali Jasim Mhaimeed Al-Sultani,Ali Jaber Al-Mamoori,Basim Mohammed Madloom Study of Minor Echocardiographic Indices of Cardiac Systolic Function in Subjects with Normal Ejection Fraction and Correlation with Age university of babylon journals in the repository for farther content please log to http://repository.uobabylon.edu.iq
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Appleton C, Galloway J, Gonzalez M et al. Estimation of left ventricular filling pressures using two-dimensional and Doppler echocardiography in adult patients with cardiac disease: additional value of analyzing left atrial ejection fraction and the difference in duration of pulmonary venous and mitral flow velocity at atrial contraction. J Am Coll Cardiol. 1993; 22 (7):1972-1982 ...
The study by Redfield et al lends further support to the concept that diastolic dysfunction is prevalent, causes symptoms of CHF, and is associated with increased mortality. Diastolic dysfunction refers to a pathologically non-compliant left ventricle (LV) in diastole, which is the result of the combination of slowed LV relaxation and increased stiffness caused by hypertension, diabetes, ischaemia, or a combination.1. The study uses a model of diastolic dysfunction that assumes temporal progression of dysfunction from mild to moderate to severe based on left heart filling patterns obtained by state of the art echo Doppler techniques. Some aspects of this approach are problematic. The temporal progression of diastolic dysfunction has not been shown, the use of echo Doppler parameters was obtained at only a single point in time, and the use of these filling patterns to reflect LV properties in a wide range of patients is not the standard of measurement. Although these limitations should be ...
TY - JOUR. T1 - The effect of variations of pulsed Doppler sampling site on calculation of cardiac output. T2 - An experimental study in open-chest dogs. AU - Fisher, D. C.. AU - Sahn, D. J.. AU - Friedman, M. J.. AU - Larson, D.. AU - Valdes-Cruz, L. M.. AU - Horowitz, S.. AU - Goldberg, S. J.. AU - Allen, H. D.. PY - 1983/1/1. Y1 - 1983/1/1. N2 - We measured aortic flow by two-dimensional Doppler echocardiography in an open-chest dog model to examine how variations in Doppler sample volume length and position influence aortic hemodynamic flow circulations. Fourteen dogs underwent right-heart bypass, in which venous return from the venae cavae drained by gravity to a reservoir. A variable-spreed roller pump returned the blood to the pulmonary artery, fixing left-sided cardiac input and output. Echo Doppler measurements were performed using a 3.5-MHz transducer placed directly on the aortic arch to determine internal aortic cross-sectional area. The transducer was then directed to image the ...
Aim: The aim of this study was to identify echocardiographic LV systolic and diastolic measurements that predict clinical events post-coronary artery bypass graft (CABG) surgery. Methods: We collected data from 27 patients (age 70 +/- 7 years) who underwent elective CABG, before and within 6 weeks after surgery. LV systolic function was assessed by conventional echocardiographic parameters. A number of LV filling measurements were also made, which included total isovolumic time (t-IVT), Tei index, and restrictive filling pattern. Postoperative cardiac events were death or hospitalization for chest pain, breathlessness, or arrhythmia. Results: Patients follow-up period was 17 +/- 10 months. Of the 27 patients (age 70 +/- 7 years, 22 male), 10 had postoperative cardiac events. LV ejection fraction (EF) and fractional shortening (FS) were lower (P = 0.01, and P = 0.007, respectively), t-IVT longer (P , 0.001), and Tei index was higher (P , 0.001) preoperatively in patients with events compared to ...
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The names of major echocardiographic methods are listed below. Expand any abbreviations at first mention, unless otherwise indicated. The following commonly used echocardiographic indexes should also be expanded at first mention but are included here for reference: Terms are combined as in the following examples: IVSd IVSs LVIDd LVIDed LVIDes LVIDs LVPWd LVPWs RVIDd Ejection fraction is expressed as a percentage, eg, 60% (see also , Numbers and Percentages). |
In spectral Doppler mode, the sample volume is placed at the end of the valvular funnel so as to minimize valvular noise and optimize the recording of blood flow. • Fig. 2-10 Spectral pulsed wave Doppler of the transaortic blood flow obtained from a left apical 5 chambers view by placing the sample volume at the level of the aortic valve. Note the asymmetry of the flow with a short acceleration time. Measurements include the maximal flow velocity (Vmax); the maximal (peak) pressure gradient (peakPG); the area under the curve, or the velocity-time integral (VTI), allowing the calculation of the mean pressure gradient (meanPG); and ejection time (ET). The aortic ratio is frequently used to describe the dimensions of the left atrium. Views Several views may be used to study the aorta and the left atrium (LA): the right parasternal long axis 5 and 4 chambers and the right parasternal short axis transaortic views. Right Parasternal Long Axis 5 Chambers View This view allows the measurements in TM ...
Doppler Echocardiography: A Practical Manual. John Wiley & Sons. ISBN 0471809144. on Govt of India web site Web Site KIMS Web ... and became one of the pioneer research workers in Doppler echocardiography and co-authored the first book on this subject from ... Padmashri by Government of India Lifetime Achievement Award by Indian Academy of Echocardiography Lifetime Achievement Award by ... Govindan Vijayaraghavan is a cardiologist from India, credited with establishing the first 2D Echocardiography laboratory in ...
Myocardial strain by Doppler echocardiography. Validation of a new method to quantify regional myocardial function. Circulation ... The Tissue Doppler method is based on the colour Doppler, giving a velocity field with velocity vectors along the ultrasound ... Quantitative assessment of intrinsic regional myocardial deformation by Doppler strain rate echocardiography in humans: ... Regional myocardial long-axis strain and strain rate measured by different tissue Doppler and speckle tracking echocardiography ...
All of these phases can be evaluated by Doppler echocardiography. Though HFpEF is characterized by a normal ejection fraction, ... "Diastolic heart failure can be diagnosed by comprehensive two-dimensional and Doppler echocardiography". Journal of the ... Echocardiography can be used to diagnose diastolic dysfunction but is a limited modality unless it is supplemented by stress ... On the mitral inflow Doppler echocardiogram, there is reversal of the normal E/A ratio. This pattern may develop normally with ...
The first group is formed by different variations of the echocardiography and echo-Doppler techniques and the second group is ... Doppler or echocardiography systems cannot assess the CO continuously. The continuous assessment capability is the major ...
Color Doppler (type of echocardiography) measures the degree of pulmonary stenosis. Additionally, close monitoring of the ... Echocardiography establishes the presence of TOF by demonstrating a VSD, RVH, and aortic override. Many patients are diagnosed ... Congenital heart defects are now diagnosed with echocardiography, which is quick, involves no radiation, is very specific, and ...
Diagnosis is made by colour doppler echocardiography scanning by a specialist veterinarian. Disorders of the skin of a ...
2-dimensional and Doppler studies are necessary to distinguish RCM from constrictive pericarditis. Cardiac MRI and transvenous ... Diagnosis is typically made via echocardiography. Patients will demonstrate normal systolic function, diastolic dysfunction, ...
Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler 54 ... Echocardiography Textbook by Bonita Anderson Echocardiography (Ultrasound of the heart). ... in Humans by Doppler Echocardiography. Gregory M. Scalia, Neil L. Greenberg, Patrick M. McCarthy, James D. Thomas, Pieter M. ... Circulation 1997;95:151-5 Color M-mode and Doppler-derived tau (τ) as practical advances in clinical diastology - the TauCoMM ...
... doppler echocardiography, and positron emission tomography (PET). Coronary flow reserve is used in diagnostics and treatment of ... "Reduced coronary flow reserve in Anderson-Fabry disease measured by transthoracic Doppler echocardiography". Cardiovascular ... "Estimation of coronary flow reserve by transesophageal coronary sinus Doppler measurements in patients with syndrome X and ... Intracoronary blood flow velocity measurements with a Doppler catheter, and digital subtraction cineangiography". European ...
"Role of Doppler echocardiography in the assessment of portopulmonary hypertension in liver transplantation candidates". ... Accuracy of Doppler Echos in the assessment of PTHN in liver transplant candidates. Liver Transplant. 6:453, 2000 Colle, IO; ... The limitations of echocardiography are related to the derivative nature of non-invasive PAP estimation. The measurement of PAP ...
Petropoulou, E; Lancellotti, P; Piérard, LA (2006). "Quantitative analysis of semi-supine exercise echocardiography--influence ... of age on myocardial Doppler imaging indices". Acta Cardiologica. 61 (3): 271-7. doi:10.2143/ac.61.3.2014827. PMID 16869446. ...
Doppler effect Echocardiography Medical imaging Medical ultrasonography Sonography Ultrasound Content initially copied from: ... Although colour Doppler can be used to detect abnormal flows between the chambers of the heart (e.g., persistent (patent) ... If microbubbles are targeted with ligands that bind these molecules, they can be used in contrast echocardiography to detect ... When used in conjunction with Doppler ultrasound, microbubbles can measure myocardial flow rate to diagnose valve problems. And ...
Echocardiography uses standard two-dimensional, three-dimensional, and Doppler ultrasound to create images of the heart. ... Echocardiography has become routinely used in the diagnosis, management, and follow-up of patients with any suspected or known ... The use of stress echocardiography may also help determine whether any chest pain or associated symptoms are related to heart ... The biggest advantage to echocardiography is that it is not invasive (does not involve breaking the skin or entering body ...
... for evaluation of the severity of native valvular regurgitation with two-dimensional and Doppler echocardiography. Zoghbi WA, ... Echocardiography is helpful in determining the severity of the disease by estimating the pulmonary artery systolic pressure. ... Echocardiography is the diagnostic gold standard, which shows left ventricular hypertrophy, leaflet calcification, and abnormal ... Mild to moderate aortic regurgitation should be followed with echocardiography and a cardiac stress test once every 1-2 years. ...
Thus, Doppler echocardiography can suggest the presence of pulmonary hypertension, but right heart catherization (described ... Taleb M, Khuder S, Tinkel J, Khouri SJ (March 2013). "The diagnostic accuracy of Doppler echocardiography in assessment of ... A meta-analysis of Doppler echocardiography for predicting the results of right heart catheterization reported a sensitivity ... Echocardiography can also help to detect congenital heart disease as a cause of pulmonary hypertension. Play media 4 month old ...
Kovács SJ, Jr., Barzilai B, Perez J. Evaluation of diastolic function with Doppler echocardiography: the PDF formalism. Am. J. ... The linearity of the model allows solution of the inverse problem of diastole, using the digitized clinical Doppler E-wave ... echocardiography) of masses and volumes of heart chambers (cardiac MRI). Among the results from this work is that the so-called ... the echocardiographic Doppler E-wave) is modeled kinematically in analogy to the recoil, from rest, of a damped simple harmonic ...
... a comparison between the pressure recording analytical method and Doppler echocardiography". Pediatric Critical Care Medicine. ... uses continuous wave Doppler to measure the Doppler flow profile VTI. It uses anthropometry to calculate aortic and pulmonary ... The blood velocity through the heart causes a Doppler shift in the frequency of the returning ultrasound waves. This shift can ... Real-time, automatic tracing of the Doppler flow profile allows beat-to-beat right-sided and left-sided Q measurements, ...
The Radiology department is equipped with CT-scan, MRI-Scan, Ultra-sound, Doppler, and digital X-ray facilities. The Cardiology ... department has echocardiography and computerized treadmill electrocardiography (ECG) alongside other facilities. A 16 channel ...
The technique of Doppler echocardiography has been called a Rosetta Stone for clinicians trying to understand the complex ... Doppler echocardiography is the clinician's Rosetta Stone". Journal of the American College of Cardiology. 30 (1): 8-18. doi: ...
... or by echocardiography/Doppler studies revealing mitral or aortic valvulitis. Both of clinical and subclinical carditis are now ... "Revision of the Jones Criteria for the Diagnosis of Acute Rheumatic Fever in the Era of Doppler Echocardiography". Circulation ... An April 2013 review article in the Indian Journal of Medical Research stated that echocardiographic and Doppler (E & D) ... Saxena, Anita (2000). "Diagnosis of rheumatic fever: Current status of Jones criteria and role of echocardiography". Indian ...
... two-dimensional echocardiography and color Doppler flow imaging study". The Journal of Pediatrics. 120 (3): 409-15. doi:10.1016 ... h) Intraoperative transesophageal echocardiography is used to confirm secure closure of the VSD, normal function of the aortic ... Confirmation of cardiac auscultation can be obtained by non-invasive cardiac ultrasound (echocardiography). To more accurately ...
... lavender aromatherapy improve coronary flow velocity reserve in healthy men evaluated by transthoracic Doppler echocardiography ...
"Relation between Duke treadmill score and coronary flow reserve using transesophageal Doppler echocardiography in patients with ... "Comparison of exercise echocardiography and the Duke treadmill score for risk stratification in patients with known or ...
November 2004). "A novel method to estimate pulmonary artery wedge pressure using the downslope of the Doppler mitral ... regurgitant velocity profile". Echocardiography. 21 (8): 673-9. doi:10.1111/j.0742-2822.2004.03174.x. PMID 15546367. Table 30-1 ...
Echocardiography ("echo"): Ultrasonography of the heart to inspect chambers, valves, and blood flow. Often utilizes the Doppler ... Echocardiography - use of ultrasound to study the mechanical function/physics of the heart. Interventional cardiology - use of ... It can be diagnosed by echocardiography or ECG. Right ventricular hypertrophy (RVH) - Hypertrophy of the right ventricle and, ...
Echocardiography and tissue Doppler echocardiography are both needed to fully diagnose the different types of ventricular ... Bundle branch block Ejection fraction Pacemaker syndrome Speckle tracking echocardiography Transthoracic echocardiogram Nagueh ...
... including Doppler echocardiography and Doppler sonography. Although a similar device named a "pulsed ultrasound flowmeter" was ... A commercial version of this device was launched in 1959 by the NEC as the "Doppler Rheograph". The results obtained with the ... They started this work in July 1958 and in the same year detected ultrasonic Doppler signals from arteries and veins at the ... The Franklin group reported remote Doppler sensing of blood flow only in 1966, citing the work by Satomura and Kaneko. Hung N. ...
This early filling across the mitral valve is seen on doppler echocardiography of the mitral valve as the E wave. After the E ... This late flow across the open mitral valve is seen on doppler echocardiography of the mitral valve as the A wave. The late ...
It can be measured by simultaneous Doppler echocardiography and M-mode sonography, or better still, by simultaneous ... phonocardiogram and transmitral Doppler. Prolonged IVRT indicates poor myocardial relaxation. A normal IVRT is about 70 ± 12 ms ...
On echocardiography, shunting of blood may not be noted except when the patient coughs.[citation needed] PFO is linked to ... 1995). "Transcranial doppler monitoring. (letter to editor)". South Pacific Underwater Medicine Society Journal. 25 (2). ISSN ... In this way, the shunt fraction can be estimated using echocardiography.[citation needed] A less invasive method for detecting ... In transthoracic echocardiography, an atrial septal defect may be seen on color flow imaging as a jet of blood from the left ...
Echocardiography *Doppler echocardiography. *TTE. *TEE. *Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. * ...
Fetal aortic valve stenosis can be diagnosed by echocardiography before birth. The diagnostic features include a poorly ... a varying degree of left ventricular hypertrophy and abnormal Doppler flow characteristics in the left heart. There may be ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
"TRANSCRANIAL DOPPLER (TCD)". Diakses tanggal 3 April 2015.. *^ Rizaldi Pinzon. "Penggunaan Trans Cranial Doppler untuk Deteksi ... transthoracic echocardiography, extracranial carotid ultrasonography, dan jika memungkinkan, cerebral angiography. ... Transcranial doppler tidak seakurat kedua alat yang mahal tersebut, tetapi salah satu keuntungannya, yaitu tidak mengandung ... pembuluh darah dan penyakit kardiovaskular yang memiliki Transcranial Doppler,[80] karena alatnya kecil/portabel dan relatif ...
Doppler echocardiography(英语:Doppler echocardiography) *TTE(英语:Transthoracic echocardiogram). *TEE(英语:Transesophageal ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
This late flow across the open mitral valve is seen on doppler echocardiography of the mitral valve as the A wave. The late ... This early filling across the mitral valve is seen on doppler echocardiography of the mitral valve as the E wave. ...
Doppler echocardiography, the use of Doppler ultrasonography to examine the heart.[28] An echocardiogram can, within certain ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ... Doppler mode: This mode makes use of the Doppler effect in measuring and visualizing blood flow *Color Doppler: Velocity ... Effet Doppler et mesure du débit sanguin » (Doppler effect and measure of the blood flow), the basis of his design of a Doppler ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Recommendations for Quantification of Doppler Echocardiography: A Report from the Doppler Quantification Task Force of the ... or laser Doppler anemometry.[12] Blood velocities in arteries are higher during systole than during diastole. One parameter to ... Measured by a New Laser Doppler Anemometer". Microvasc Research. 52 (2): 188-192. doi:10.1006/mvre.1996.0054. PMID 8901447.. ... Nomenclature and Standards Committee of the American Society of Echocardiography. J Am Soc Echocardiogr 2002;15:167-184 ...
Although colour Doppler can be used to detect abnormal flows between the chambers of the heart (e.g., persistent (patent) ... If microbubbles are targeted with ligands that bind these molecules, they can be used in contrast echocardiography to detect ... When used in conjunction with Doppler ultrasound, microbubbles can measure myocardial flow rate to diagnose valve problems. And ... Untargeted microbubbles like Optison and Levovist are currently used in echocardiography. In addition, SonoVue[9] ultrasound ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
This is not as informative as volumes but may be much easier to estimate with (e.g., M-Mode echocardiography[12] or with ... "Right ventricular thickness as predictor of global myocardial performance in systemic sclerosis: A Doppler tissue imaging ... "Left ventricle size - Echocardiography in ICU". Stanford.edu. 2009-06-23. Retrieved 2018-09-21.. ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Doppler techniques can be used to visualize blood flow through the heart, great vessels, and umbilical vessels. Assessment of ... Fetal echocardiography is the name of the test used to diagnose cardiac conditions in the fetal stage. Cardiac defects are ... Indications for fetal echocardiography high referral, low yield? Davey BT, Seubert DE, Phoon CK. Obstet Gynecol Surv. 2009 Jun; ... 4. ISUOG Fetal Echocardiography Task Force. ISUOG consensus statement: what constitutes a fetal echocardiogram?Lee W, Allan L, ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Cats are screened for HCM disease with echocardiography (ultrasound of the heart), as well as with additional tests determined ... "Prospective echocardiographic and tissue Doppler screening of a large Sphynx cat population: Reference ranges, heart disease ...
Echocardiography TTE. TEE. Myocardial perfusion imaging. Cardiovascular MRI. Ventriculography Radionuclide ventriculography. ... Echoencephalography/Transcranial Doppler. *Magnetic resonance imaging of the brain. *Brain PET. *Myelography ...
Main article: Echocardiography. Echocardiography uses standard two-dimensional, three-dimensional, and Doppler ultrasound to ... Echocardiography has become routinely used in the diagnosis, management, and follow-up of patients with any suspected or known ... The use of stress echocardiography may also help determine whether any chest pain or associated symptoms are related to heart ... The biggest advantage to echocardiography is that it is not invasive (does not involve breaking the skin or entering body ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Echocardiography uses 2D, 3D, and Doppler imaging to create pictures of the heart and visualize the blood flowing through each ... EchocardiographyEdit. Main article: Echocardiography. When ultrasound is used to image the heart it is referred to as an ... Echocardiography is one of the most commonly used imaging modalities in the world due to its portability and use in a variety ... Echocardiography is widely used in an array of patients ranging from those experiencing symptoms, such as shortness of breath ...
Ecografía Doppler (es); Échographie Doppler (fr); Доплерография (ru); Farbkodierte Doppler-Sonografie (de); Siêu âm Doppler (vi ... Ecografia Doppler (it); Doppler echocardiography (en); الدوبلر الطبي (ar); 多普勒超声 (zh-hans); Ecografia Doppler (ca) tecnica non ... Doppler echography, duplex ultrasonography, Color-coded Doppler sonography, Echocardiography, Doppler (en); اکودوپلر (fa); ... Myocardial-tissue-Doppler-echocardiography-and-N-terminal-B-type-natriuretic-peptide-(NT-proBNP)-in-1476-7120-6-45-S1.ogv 2.4 s ...
Basic ultrasound, echocardiography and Doppler for clinicians Echocardiography Textbook by Bonita Anderson Echocardiography ( ... Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler " ... Doppler echocardiography is a procedure that uses Doppler ultrasonography to examine the heart. An echocardiogram uses high ... "Clinical Utility of Doppler Echocardiography and Tissue Doppler Imaging in the Estimation of Left Ventricular Filling Pressures ...
... are usually synonymous with TDE because echocardiography is the main use of tissue Doppler. Like Doppler flow, tissue Doppler ... Tissue Doppler echocardiography (TDE) is a medical ultrasound technology, specifically a form of echocardiography that measures ... as pulsed Doppler and by the autocorrelation technique as colour tissue Doppler (duplex ultrasonography). While pulsed Doppler ... The technique is the same as for flow Doppler echocardiography measuring flow velocities. Tissue signals, however, have higher ...
Doppler echocardiography definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. ... Doppler echocardiography. doping, doppelgänger, Dopper, doppio, Doppler, Doppler echocardiography, Doppler effect, Doppler ... The use of Doppler ultrasonography to augment echocardiograms that are two-dimensional by allowing velocities to be registered ...
Two dimensional and Doppler echocardiography constitutes a safe, non-invasive, easily repeatable diagnostic examination that ... Diagnosis by two dimensional and pulsed Doppler echocardiography. Am J Cardiol 54: 277-281.PubMedGoogle Scholar ... Two dimensional and Doppler echocardiography constitutes a safe, non-invasive, easily repeatable diagnostic examination that ... García-Fernandez M.A., López-Sendón J., Yangüela M.M. (1991) Two dimensional echocardiography and Doppler findings in right ...
... determine the reproducibility of both acquiring and measuring myocardial velocities recorded by tissue Doppler echocardiography ... Reproducibility of pulsed wave tissue Doppler echocardiography J Am Soc Echocardiogr. 1999 Jun;12(6):492-9. doi: 10.1016/s0894- ... reproducibility of acquiring and measuring tissue Doppler echocardiography is suboptimal for both systolic and diastolic ... determine the reproducibility of both acquiring and measuring myocardial velocities recorded by tissue Doppler echocardiography ...
... J Am Soc Echocardiogr ... The Doppler end-diastolic velocity in the descending aorta is a useful parameter of severity of aortic regurgitation. ... ascending aortic regurgitant fraction + 1.4 cm/sec; r = 0.94; p , 0.001). Pulsedwave Doppler sampling of descending aortic flow ... The best descending aortic Doppler echocardiographic parameter for predicting ascending aortic regurgitant fraction was the end ...
Transthoracic echocardiography was performed to assess valve and cardiac function. Tissue Doppler echocardiography was ... N-Terminal proBNP Levels and Tissue Doppler Echocardiography in Acute Rheumatic Carditis. Alyaa A. Kotby, Ghada S. El-Shahed, ...
Practical Quantitative Doppler Echocardiography has 1 available editions to buy at Alibris ... Practical Quantitative Doppler Echocardiography by John H Phillips starting at $73.41. ... Practical Quantitative Doppler Echocardiography. by John H Phillips Write The First Customer Review ... This book provides essential information for using quantitative Doppler echocardiography in routine clinical cardiological ...
But in general Doppler echocardiography appeared to be a successful technique to quantify pure aortic regurgitation. ... This study was undertaken to assess the contribution of Doppler echocardiography to the quantification of aortic valve ... In pure aortic regurgitation (67 patients) the results showed a high correlation coefficient between Doppler and angiographic ...
Doppler echocardiography test. Nurse using an ultrasound scanner to carry out a doppler echocardiography test on a patient in a ... Doppler echocardiography test. Nurse using an ultrasound scanner to carry out a doppler echocardiography test on a patient in a ... doppler echocardiography, dopppler effect, echocardiogram, england, english, equipment, europe, european, female, healthcare, ...
Color Doppler echocardiography provides a two-dimensional moving image of the heart. Near the upper left, the heart can be seen ...
Redel D.A., Hansmann M. (1981) Fetal Obstruction of the Foramen Ovale Detected by Two-Dimensional Doppler Echocardiography. In ... Fetal Obstruction of the Foramen Ovale Detected by Two-Dimensional Doppler Echocardiography. ...
Right ventricular myocardial performance index derived from tissue Doppler echocardiography is useful in differentiating apical ... Doppler tissue imaging-derived RIMP may help differentiate ABS from obstructive LAD disease with high accuracy. This easily ... A total of 80 patients with new extensive apical left ventricular wall motion abnormalities on echocardiography who underwent ... 2D; ABS; Apical ballooning syndrome; Coronary artery disease; Doppler tissue imaging; ET; ICC; Intraclass correlation ...
Non-invasive determination of cardiac output by Doppler echocardiography and electrical bioimpedance ... Non-invasive determination of cardiac output by Doppler echocardiography and electrical bioimpedance ...
Establishing Better Standards of Care in Doppler Echocardiography, Computed Tomography and Nuclear Cardiology. Edited by: ... The Importance of Doppler-echocardiography in the Assessment of the Athletes Heart. By Gábor Pavlik and Zsuzsanna Kneffel ... Establishing Better Standards of Care in Doppler Echocardiography, Computed Tomography and Nuclear Cardiology. Edited by ... Establishing Better Standards of Care in Doppler Echocardiography, Computed Tomography and.... Edited by Richard M. Fleming ...
Speckle-Tracking and Tissue-Doppler Stress Echocardiography in Arterial Hypertension: A Sensitive Tool for Detection of ... T. H. Marwick, "Quantitative techniques for stress echocardiography: dream or reality?" European Journal of Echocardiography, ... "Effect of tissue Doppler on the accuracy of novice and expert interpreters of dobutamine echocardiography," The American ... "Determinants of tissue Doppler measures of regional diastolic function during dobutamine stress echocardiography," American ...
This book covers the full range of Doppler echocardiography in infants and children,... ... Doppler Echocardiography in Infancy and Childhood auf frohberg.de - ... This book covers the full range of Doppler echocardiography in infants and children, documenting the wide variety of potential ... Doppler Echocardiography in Infancy and Childhood will be an invaluable reference for echocardiographers, pediatricians, ...
Echocardiography, Doppler*. Exercise*. Humans. Lung Diseases / diagnosis*, radiography. Lung Diseases, Obstructive / diagnosis ... Doppler echocardiography and CT provide complementary and potentially useful information about right-sided heart pressures and ... Doppler echocardiography and ultrafast cine computed tomography during dynamic exercise in chronic parenchymal pulmonary ... Patients underwent sequential exercise tests with Doppler echocardiography and ultrafast cine computed tomography (CT). RV ...
Normal Doppler waveforms of inferior vena cava Doppler obtained at sagittal view of superior and inferior vena cavas (a). The ... Functional cardiac measurements performed by two-dimensional Doppler echocardiography in normal fetuses: Determination of Z- ... Functional cardiac measurements performed by two-dimensional Doppler echocardiography in normal fetuses: Determination of Z- ... Functional cardiac measurements performed by two-dimensional Doppler echocardiography in normal fetuses: Determination of Z- ...
Relation of pulmonary vein to mitral flow velocities by transesophageal Doppler echocardiography. Effect of different loading ... Relation of pulmonary vein to mitral flow velocities by transesophageal Doppler echocardiography. Effect of different loading ... Relation of pulmonary vein to mitral flow velocities by transesophageal Doppler echocardiography. Effect of different loading ... Relation of pulmonary vein to mitral flow velocities by transesophageal Doppler echocardiography. Effect of different loading ...
... echocardiography at rest, stress Doppler echocardiography (SDE) and by right heart catheter at rest and during exercise by two ... Conclusion:Stress Doppler echocardiography is a safe and reliable procedure and might be a useful non-invasive tool for the ... Stress-Doppler-Echocardiography for early detection of systemic sclerosis associated pulmonary arterial hypertension. Mona ... Stress-Doppler-Echocardiography for early detection of systemic sclerosis associated pulmonary arterial hypertension ...
The role of combined two-dimensional and pulsed Doppler echocardiography in the postoperative assessment of patients with total ... The role of combined two-dimensional and pulsed Doppler echocardiography in the postoperative assessment of patients with total ... Combined two-dimensional and Doppler echocardiography is a useful adjunct in the postoperative evaluation of patients with ... Two-dimensional and pulsed Doppler echocardiography in the postoperative evaluation of total anomalous pulmonary venous ...
Echocardiography, Doppler Echocardiography, Doppler, Pulsed Heart Diseases Humans Hypertension, Pulmonary Prospective Studies ... Doppler echocardiography MeSH Terms expand_less. expand_more. Acceleration Arterial Pressure Cardiac Catheterization Cardiac ... Noninvasive Estimation of Pulmonary Arterial Pressure by a Pulsed Doppler Echocardiography.. Kim SK , Jeon ES , Kim YH , Oh BH ... National University Hospital from April to October in 1986 were prospectively examined by a pulsed Doppler echocardiography on ...
Find out information about color Doppler echocardiography. A diagnostic technique for the heart that uses a transducer held ... against the chest to send high-frequency sound waves which pass harmlessly into the heart;... Explanation of color Doppler ... Key words: Natriuretic peptide, heart failure, echocardiography, color Doppler echocardiography, tissue Doppler ... Echocardiography. (redirected from color Doppler echocardiography). Also found in: Dictionary, Thesaurus, Medical. ...
Doppler echocardiography was more accurate than B-type natriuretic peptide assay for detecting CHF in acute dyspnea Ellis W. ... Doppler echocardiography was more accurate than B-type natriuretic peptide assay for detecting CHF in acute dyspnea. ACP J Club ... Comparative value of Doppler echocardiography and B-type natriuretic peptide assay in the etiologic diagnosis of acute dyspnea. ... In patients with acute dyspnea, how does the accuracy of Doppler echocardiography compare with bedside B-type natriuretic ...
Serial changes in pulmonary haemodynamics during human pregnancy: a non-invasive study using Doppler echocardiography Stephen C ... Pulmonary flow was measured by Doppler and cross-sectional echocardiography. These two measurements were used to calculate ... 2. Mean pulmonary artery pressure was calculated from pulsed Doppler pulmonary velocities. ... a non-invasive study using Doppler echocardiography. Clin Sci (Lond) 1 February 1991; 80 (2): 113-117. doi: https://doi.org/ ...
Colour Doppler & Ultrasound Scan & ECG Machine from Nagpur, Maharashtra, India ... Family Care Clinic - Service Provider of 2d echo cardiography, colour doppler & ultrasound scan & ecg machine in Nagpur, ...
Discrepancies between tissue Doppler velocities on different echocardiography machines: comparing apples to oranges. ... Discrepancies between tissue Doppler velocities on different echocardiography machines: comparing apples to oranges. ... Discrepancies between tissue Doppler velocities on different echocardiography machines: comparing apples to oranges. ...
Diastolic Dysfunction and Doppler Echocardiography Message Subject (Your Name) has forwarded a page to you from JACC: Journal ... Can it be diagnosed by Doppler echocardiography? J Am Coll Cardiol 44:1543-1549. ... or HFNEF when more sensitive measures of left ventricular long axis function are made by tissue Doppler recording of the mitral ...
  • Unlike 1D Doppler imaging, which can only provide one-dimensional velocity and has dependency on the beam to flow angle, 2D velocity estimation using Doppler ultrasound is able to generate velocity vectors with axial and lateral velocity components. (wikipedia.org)
  • There are two major methods of 2D velocity estimation using ultrasound: Speckle tracking and crossed beam Vector Doppler, which are based on measuring the time shifts and phase shifts respectively. (wikipedia.org)
  • Tissue Doppler echocardiography (TDE) is a medical ultrasound technology, specifically a form of echocardiography that measures the velocity of the heart muscle (myocardium) through the phases of one or more heartbeats by the Doppler effect (frequency shift) of the reflected ultrasound. (wikipedia.org)
  • Nurse using an ultrasound scanner to carry out a doppler echocardiography test on a patient in a hospital's cardiology department. (sciencephoto.com)
  • Right ventricular myocardial involvement in either physiological or pathological left ventricular hypertrophy: an ultrasound speckle-tracking two-dimensional strain analysis," European Journal of Echocardiography , vol. 11, no. 6, pp. 492-500, 2010. (hindawi.com)
  • After the induction of anesthesia, a 2-MHz pulsed Doppler ultrasound device (Neuroguard, Freemont, CA) with two probes was used to insonate the middle cerebral arteries (MCAs) bilaterally from the posterior temporal window above the zygomatic arch. (asahq.org)
  • Doppler echocardiography uses similar ultrasound transducers and color-coded video to judge the speed, amount and direction of the blood cells flowing through parts of the heart and great vessels. (freethesaurus.com)
  • What is Ultrasound/ Doppler? (cairoscan.com.eg)
  • Doppler ultrasound is a special ultrasound technique that evaluates blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, Arms, legs and neck. (cairoscan.com.eg)
  • Adults may be asked to stop using nicotine-based products 30 minutes to two hours prior to a transcranial Doppler ultrasound exam. (cairoscan.com.eg)
  • In continuous wave Doppler mode, blood flow is sampled along the entire length of the ultrasound beam, superimposing all encountered forward flow and reverse flow on the spectral Doppler graph. (echocardiographyskills.com)
  • Color Doppler Ultrasound System is a very high cost-effective device, for it with good image, powerful functions and also pretty appearance, but price is inexpensive. (sifsof.com)
  • The experienced sonographer employs the Doppler ultrasound audio output as a guide to the best positioning of the transducer and cursor for obtaining the most accurate Spectral Doppler recording. (echocardiographyskills.com)
  • Sonographers who are just starting in the field may experience some confusion about the importance of Doppler audio in an ultrasound exam. (echocardiographyskills.com)
  • And it is the same with Doppler ultrasound examinations. (echocardiographyskills.com)
  • Spectral Doppler and Doppler audio are inseparable for a well-done ultrasound examination. (echocardiographyskills.com)
  • How can echocardiography & Doppler ultrasound help detect heart diseases? (cardiogod.com)
  • Sometimes simply referred to as, Doppler, the modern method of ultrasound diagnostics ( Doppler Echocardiography ) helps detect pathological changes in blood vessels. (cardiogod.com)
  • The Doppler method measures the change in frequency of ultrasound waves bouncing off of blood cells (the Doppler Effect ). (cardiogod.com)
  • Shigeo Satomura: 60 years of Doppler ultrasound in medicine. (mhmedical.com)
  • The consequences in giving spectral V-plots , and the utility of spectral Doppler in rendering clutter noise irrelevant is also added to the basic strain ultrasound and pitfalls sections. (ntnu.no)
  • A Doppler ultrasound is an imaging test that uses sound waves to show blood moving through blood vessels. (medlineplus.gov)
  • Doppler ultrasound works by measuring sound waves that are reflected from moving objects, such as red blood cells. (medlineplus.gov)
  • There are different types of Doppler ultrasound tests. (medlineplus.gov)
  • Doppler ultrasound tests are used to help health care providers find out if you have a condition that is reducing or blocking your blood flow. (medlineplus.gov)
  • Why do I need a Doppler ultrasound? (medlineplus.gov)
  • You may need a Doppler ultrasound if you have symptoms of reduced blood flow or a heart disease. (medlineplus.gov)
  • What happens during a Doppler ultrasound? (medlineplus.gov)
  • Practical Manual of Echocardiography in the Urgent Setting covers the essentials of echocardiography in the acute setting, from ultrasound basics to descriptions of all pertinent echocardiographic views to clear stepwise advice on basic calculations and normal/abnormal ranges. (wiley.com)
  • Color Doppler echocardiography provides a two-dimensional moving image of the heart. (merckmanuals.com)
  • The book is supplemented by more than 500 videos demonstrating typical findings of two-dimensional and color Doppler echocardiography. (frohberg.de)
  • Color Doppler echocardiography revealed a moderate mitral regurgitation and a moderate-to-severe tricuspid regurgitation. (thefreedictionary.com)
  • The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic regurgitation (AR). (elsevier.com)
  • In addition, with slightly different filter/gain settings, the method can measure tissue velocities by tissue Doppler echocardiography. (wikipedia.org)
  • The technique is the same as for flow Doppler echocardiography measuring flow velocities. (wikipedia.org)
  • The use of Doppler ultrasonography to augment echocardiograms that are two-dimensional by allowing velocities to be registered within the echocardiogram. (dictionary.com)
  • 10 men, 6 women) were analyzed to determine the reproducibility of both acquiring and measuring myocardial velocities recorded by tissue Doppler echocardiography. (nih.gov)
  • With the use of current techniques and software, reproducibility of acquiring and measuring tissue Doppler echocardiography is suboptimal for both systolic and diastolic myocardial velocities. (nih.gov)
  • Relation of pulmonary vein to mitral flow velocities by transesophageal Doppler echocardiography. (ahajournals.org)
  • The purpose of this study was to relate changes in pulmonary venous and mitral flow velocities during different loading conditions as assessed by transesophageal echocardiography in the operating room. (ahajournals.org)
  • 2. Mean pulmonary artery pressure was calculated from pulsed Doppler pulmonary velocities. (portlandpress.com)
  • Discrepancies between tissue Doppler velocities on different echocardiography machines: comparing apples to oranges. (harvard.edu)
  • The diagnosis can be confirmed if Doppler echocardiography and myocardial tissue imaging provide evidence for impaired myocardial relaxation (i.e., decreased longitudinal velocity of the mitral annulus during early diastole and decreased propagation velocity mitral inflow), decreased compliance (shortened mitral A-wave duration and mitral deceleration time), and increased filling pressure (shortened isovolumic relaxation time and an increased ratio between early diastolic mitral and mitral annular velocities). (onlinejacc.org)
  • Whereas the systolic component of this Doppler pattern has been shown to be clearly preload dependent [ 5 ], less transparency exists on the load dependency of the diastolic myocardial velocities. (biomedcentral.com)
  • While standard pulsed-wave Doppler echocardiography provides the temporal distribution of blood flow velocities in a specific location, color M-mode propagation velocity provides the spatiotemporal map of these velocities of the blood flow along the scan line from the mitral annulus to the left ventricle (LV) apex. (freethesaurus.com)
  • This study was designed to assess whether mitral annular velocities as assessed by tissue Doppler imaging are associated with invasive measures of diastolic LV performance and whether additional information is gained over traditional Doppler variables. (elsevier.com)
  • The advantage of CW Doppler is that it can record much higher velocities than PW Doppler because the Doppler signal is not pulsed and does not have to interrupt the signal in order to receive the blood flow information. (echocardiographyskills.com)
  • Standard transthoracic Doppler echocardiographical measurements, reconstructed spectral pulsed wave tissue Doppler velocities, strain and strain rate imaging of six different myocardial regions were obtained. (unboundmedicine.com)
  • From the Doppler measurements of blood flow velocities in the LV, the inertial force was determined by calculating the change in momentum produced by the contracting shell based on the equation of continuity and that of motion. (elsevier.com)
  • For assessing LV diastolic function, pulsed Doppler transmitral and pulmonary vein (PV) flow velocities are used. (asnjournals.org)
  • Henry WL, De Maria An, Gramiak R, King DL, Kisslo JA, Popp RL (1980) Report of the American Society of Echocardiography Committee on nomenclature and standards in two dimensional echocardiography. (springer.com)
  • Two-dimensional strain-a novel software for real-time quantitative echocardiographic assessment of myocardial function," Journal of the American Society of Echocardiography , vol. 17, no. 10, pp. 1021-1029, 2004. (hindawi.com)
  • Recommendations for chamber quantification: a report from the American Society of Echocardiography's guidelines and standards committee and the Chamber Quantification Writing Group, developed in conjunction with the European Association of Echocardiography, a branch of the European Society of Cardiology," Journal of the American Society of Echocardiography , vol. 18, no. 12, pp. 1440-1463, 2005. (hindawi.com)
  • Recommendations for the evaluation of left ventricular diastolic function by echocardiography," Journal of the American Society of Echocardiography , vol. 22, no. 2, pp. 107-133, 2009. (hindawi.com)
  • author = {Aburawi, Elhadi and Berg, Ansgar and Pesonen, Erkki}, issn = {1097-6795}, language = {eng}, pages = {165--169}, publisher = {Elsevier}, series = {Journal of the American Society of Echocardiography}, title = {Effects of Balloon Valvuloplasty on Coronary Blood Flow in Neonates With Critical Pulmonary Valve Stenosis Assessed With Transthoracic Doppler Echocardiography. (lu.se)
  • In a clinical study of patients with at least mild MR, regurgitation severity was assessed quantitatively using Doppler-derived effective regurgitant orifice area (EROA), and semiquantitatively as recommended by the American Society of Echocardiography. (onlinejacc.org)
  • Journal of the American Society of Echocardiography , 19 (8), 1045-1050. (elsevier.com)
  • Journal of the American Society of Echocardiography , 15 (10 II), 1238-1244. (elsevier.com)
  • EUSTAR co-authors 2017, ' Clinical determinants of elevated systolic pulmonary artery pressure measured by transthoracic Doppler echocardiography in early systemic sclerosis ', Clinical and Experimental Rheumatology , vol. 35, pp. (elsevier.com)
  • However, MPG measured by cardiovascular magnetic resonance (CMR) may differ from the one measured by transthoracic Doppler-echocardiography (TTE). (biomedcentral.com)
  • Eight patients were excluded because of either inability to insonate the middle cerebral arteries (n = 4) or contraindications for transesophageal echocardiography (TEE)(difficulty swallowing, n = 3, and/or documented esophageal stricture, n = 1). (asahq.org)
  • Transesophageal echocardiography was performed with an omniplane probe (Hewlett Packard, Andover, MA) and was positioned to monitor both atria with emphasis on the interatrial septum. (asahq.org)
  • This program will provide a comprehensive review of state-of-the-art 2-D, Doppler and transesophageal echocardiography with a strong emphasis on newer and more rapidly changing areas. (radcliffecardiology.com)
  • The evaluation of hemodynamic status in critically ill patients is a leading recommended indication of transesophageal echocardiography in the intensive care unit. (qxmd.com)
  • Advantages and diagnostic yield of transesophageal echocardiography in this setting are particularly relevant when considering limitations and questioned prognostic impact of pulmonary artery catheterization. (qxmd.com)
  • Recent clinical studies have been performed to validate and assess the value of transesophageal echocardiography in determining cardiac output, cardiac preload dependence, right ventricular function, and left ventricular filling pressure. (qxmd.com)
  • In addition, diagnostic capacity and therapeutic impact of transesophageal echocardiography have been widely reported in various intensive care unit settings. (qxmd.com)
  • Transesophageal echocardiography appears well suited for the determination of cardiac index and to track its variations after therapeutic interventions. (qxmd.com)
  • Transesophageal echocardiography also allows to adequately assess right ventricular function and left ventricular filling pressure using combined Doppler modalities. (qxmd.com)
  • Adequate education and training of intensivists and anesthesiologists is crucial to further develop the use of transesophageal echocardiography in the intensive care unit setting. (qxmd.com)
  • Despite the absence of randomized controlled studies documenting transesophageal echocardiography benefits on patient outcome, present evidence and experience strongly recommend a larger use of echocardiography Doppler for a comprehensive functional hemodynamic assessment of critically ill patients with circulatory failure. (qxmd.com)
  • An echocardiogram can, within certain limits, produce accurate assessment of the direction of blood flow and the velocity of blood and cardiac tissue at any arbitrary point using the Doppler effect. (wikipedia.org)
  • Although "Doppler" has become synonymous with "velocity measurement" in medical imaging, in many cases it is not the frequency shift (Doppler shift) of the received signal that is measured, but the phase shift (when the received signal arrives). (wikipedia.org)
  • The terms tissue Doppler imaging (TDI) and tissue velocity imaging (TVI) are usually synonymous with TDE because echocardiography is the main use of tissue Doppler. (wikipedia.org)
  • While pulsed Doppler only acquires the velocity at one point at a time, colour Doppler can acquire simultaneous pixel velocity values across the whole imaging field. (wikipedia.org)
  • The magnetic resonance ascending aortic regurgitant fraction was compared with Doppler echocardiographic descending aortic flow velocity patterns. (nih.gov)
  • Pulsedwave Doppler sampling of descending aortic flow reflects severity of aortic regurgitant disease, in part the result of more uniform blood-velocity profiles in the descending aorta compared with the ascending aorta. (nih.gov)
  • The Doppler end-diastolic velocity in the descending aorta is a useful parameter of severity of aortic regurgitation. (nih.gov)
  • Therefore, the aim of this study was to determine the roles of echocardiographic measures of right ventricular (RV) function, namely, Doppler tissue imaging-derived RV index of myocardial performance (RIMP), RV basal free wall systolic excursion velocity (RV S'), and tricuspid annular plane systolic excursion, in differentiating ABS from obstructive LAD disease. (nih.gov)
  • Quantification of the myocardial response to low-dose dobutamine using tissue Doppler echocardiographic measures of velocity and velocity gradient," The American Journal of Cardiology , vol. 81, no. 5, pp. 615-623, 1998. (hindawi.com)
  • Although in the previous issue of Critical Care it was clearly demonstrated there might be a difference in load dependency of the early myocardial tissue Doppler velocity between lateral and septal placed sample volume, there remain still several unanswered questions, particularly with respect to the preload dependency of these indices. (biomedcentral.com)
  • A typical transmitral Doppler pattern consists of a larger early filling velocity wave (E wave) followed by an atrial contraction flow velocity wave. (biomedcentral.com)
  • This Doppler mode facilitates the assessment of the movement of the myocardial tissue, which typically reflects low velocity with very high amplitude Doppler signals. (biomedcentral.com)
  • As regards the transthoracic Doppler assessment of CFR in the RCA we are able to measure the coronary flow velocity in proximal RCA and in its distal branch i.e. right posterior descending artery. (biomedcentral.com)
  • Left ventricular function in patients with chronic kidney disease evaluated by colour tissue Doppler velocity imaging. (semanticscholar.org)
  • Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells. (uchicago.edu)
  • Introduction: Current guidelines for the functional evaluation of bioprosthetic heart valves recommend the effective orifice area (EOA) as the product of the trans-valvular stroke volume divided by Doppler derived diastolic time velocity integral (TVI). (biomedcentral.com)
  • The ratio of mitral velocity to early diastolic velocity of the mitral annulus (E/E') showed a better correlation with M-LVDP than did other Doppler variables for all levels of systolic function. (elsevier.com)
  • Conclusions The combination of tissue Doppler imaging of the mitral annulus and mitral inflow velocity curves provides better estimates of LV filling pressures than other methods (pulmonary vein, preload reduction). (elsevier.com)
  • The disadvantage of CW Doppler is that it cannot indicate at what depth the displayed velocity is located and therefore is best used in combination with two-dimensional imaging and color Doppler in order to make certain that no other high velocity blood flow can be confused with the intended target. (echocardiographyskills.com)
  • While the spectral Doppler recording does show the velocity profile and an operator could perform Doppler without it, the human ear is much more sensitive to the audio output than the spectral Doppler graph, which is actually a compressed interpretation of the frequency shifts. (echocardiographyskills.com)
  • Although left ventricular diastolic filling patterns can be examined by both Doppler velocity recordings and gated blood pool scintigraphy, few data exist regarding a comparison of these techniques. (docphin.com)
  • Doppler measurements included peak velocity of the early diastolic filling wave, time to peak early diastolic velocity from both end-systole and end-diastole, diastolic time period and diastolic integrated velocity (early, atrial and total). (docphin.com)
  • Standard Doppler transmitral and pulmonary vein (PV) flow velocity measurements are preload dependent. (asnjournals.org)
  • New techniques such as mitral annulus velocity by Doppler tissue imaging (DTI) and LV inflow propagation velocity measured from color M-mode have been proposed as relatively preload-independent measurements of diastolic function. (asnjournals.org)
  • citation needed] Pulsed wave spectral tissue Doppler has become a universal tool that is part of the general echocardiographic examination. (wikipedia.org)
  • Like any other echocardiographic measurement, measures by tissue Doppler should be interpreted in the context of the whole examination. (wikipedia.org)
  • It translates complex concepts and formulations into practical, easily understood evaluations that will allow any properly equipped echocardiographic laboratory to enjoy the rewards of "quantitative" cardiac Doppler. (alibris.com)
  • The aim of our study is to determine the effect of obesity on LV morphology and systolic function by using LV standard Doppler echocardiographic indices, myocardial Doppler imaging and strain/strain rate imaging indices. (unboundmedicine.com)
  • Patients were classified by the Canadian consensus guidelines using transmitral and pulmonary venous Doppler echocardiographic parameters to have normal diastolic function or mild (abnormal relaxation), mild-to-moderate, moderate (pseudonormal), or severe (restrictive) diastolic dysfunction. (elsevier.com)
  • Standard guidelines of Doppler echocardiographic parameters allow semiquantitation of diastolic function and can be applied to studying large number of patients in a large clinical practice. (elsevier.com)
  • Of the 12 patients with echocardiographic abnormalities , 10 displayed very high anti streptolysin O (ASO) titres, 5 showed positive cultures for GAS and 9 had abnormal ESR, even if no significant differences were found in respect to patients with tics and normal echocardiography . (bvsalud.org)
  • Right ventricular myocardial performance index derived from tissue Doppler echocardiography is useful in differentiating apical ballooning syndrome. (nih.gov)
  • Right ventricular myocardial performance index derived from tissue Doppler echocardiography is useful in differentiating apical ballooning syndrome from cardiomyopathy due to left anterior descending coronary artery disease. (nih.gov)
  • Diastolic heart failure easily can be diagnosed by comprehensive two-dimensional and Doppler echocardiography, which can demonstrate abnormal myocardial relaxation, decreased compliance, and increased filling pressure in the setting of normal LV dimensions and preserved LVEF. (onlinejacc.org)
  • Diastolic heart failure should always be considered when LVEF is normal on two-dimensional echocardiography in patients with clinical evidence of heart failure and Doppler echocardiography and myocardial tissue help confirm the diagnosis. (onlinejacc.org)
  • The technique is hampered by shortcomings related to the Doppler technology (angle misalignment, translation and rotation of the myocardial tissue) and by intrinsic characteristics of myocardial function (for example, the presence of regional wall motion abnormalities). (biomedcentral.com)
  • Accordingly, tissue doppler imaging (TDI) can predict myocardial function recovery after revascularization. (authorea.com)
  • Purpose: To assess the value of Tissue Doppler Imaging echocardiography in predicting recovery of myocardial function after percutaneous coronary revascularization in patients with coronary artery disease (CAD). (authorea.com)
  • Redel D.A., Hansmann M. (1981) Fetal Obstruction of the Foramen Ovale Detected by Two-Dimensional Doppler Echocardiography. (springer.com)
  • An echocardiogram uses high frequency sound waves to create an image of the heart while the use of Doppler technology allows determination of the speed and direction of blood flow by utilizing the Doppler effect. (wikipedia.org)
  • Two-dimensional (2D) echocardiogram with the aid of color Doppler and pulsed Doppler allows one to record blood flow waveforms in several structures of the heart. (nih.gov)
  • PVCAP was derived noninvasively from a comprehensive 2-dimensional and Doppler echocardiogram. (ovid.com)
  • 2D.3D.4D Doppler Echocardiogram by RS Medical System is the best in its category in Bhopal. (bhopalonline.in)
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  • This study was designed to evaluate the diagnostic accuracy of physical examination , chest radiography (CR) and BNP in estimating left atrial pressure (LAP) as assessed by tissue Doppler echocardiogram. (bvsalud.org)
  • Tissue Doppler echocardiography was performed for E/E′ (ratio between mitral inflow E wave and lateral mitral annulus E′ wave) and systolic strain. (hindawi.com)
  • Physiologic determinants of mitral inflow pattern using a computer simulation: insights into Doppler echocardiography in diverse phenotypes. (semanticscholar.org)
  • BACKGROUND Although echo Doppler recordings of mitral inflow patterns are often employed clinically to identify 'diastolic dysfunction,' abnormal flow profiles may be seen in a diverse set of disorders in which the specific physiologic determinants are not well defined. (semanticscholar.org)
  • Doppler signals from the mitral inflow, pulmonary venous inflow, and TDI of the mitral annulus were obtained. (elsevier.com)
  • Doppler echocardiography was done within 60 minutes of enrollment using a Hewlett-Packard Sonos 1500 (Andover, MA, USA) machine with a 2.5-MHz probe and included 2-dimensional and M-mode examination, pulsed Doppler analysis of mitral inflow, and continuous Doppler analysis of tricuspid regurgitation. (acponline.org)
  • Recent advances in real-time three-dimensional (3D) echocardiography provide the automated measurement of mitral inflow and aortic stroke volume without the need to assume the geometry of the heart. (elsevier.com)
  • Functional cardiac measurements performed by two-dimensional Doppler echocardiography in normal fetuses: Determination of Z-scores and future prosp. (nih.gov)
  • The aim of this review was to discuss the findings of the reference values of blood flows obtained by 2D echocardiography with Doppler, the current trend of the determination of Z-scores in the functional measurements, and their future prospects. (nih.gov)
  • Second, a validation study was carried out where the pathway accuracy was evaluated against pulsed-wave Doppler (100 subjects), and 2D through-plane phase-contrast magnetic resonance imaging measurements over 7 intraventricular planes (6 subjects). (diva-portal.org)
  • The method provides reliable measurements of CFR in the distal or middle segment of left anterior descending coronary artery (LAD), using pulsed wave Doppler echocardiography under the guidance of color Doppler flow mapping. (biomedcentral.com)
  • Doppler measurements may be displayed in black and white or in color. (weillcornell.org)
  • Two dimensional and Doppler echocardiography constitutes a safe, non-invasive, easily repeatable diagnostic examination that provide reliable and valuable information about the structure and function of the heart. (springer.com)
  • The imaging features of more than 20 conditions on conventional two-dimensional echocardiography, pulsed wave, continuous wave and color Doppler imaging are described and depicted, drawing attention to differential diagnostic criteria and other issues of importance in everyday clinical practice. (frohberg.de)
  • Their contention was that Doppler echocardiography, which is currently the most practical and reproducible diagnostic modality to identify these patients, reflects mainly diastolic filling pressure rather than the intrinsic diastolic properties of the heart. (onlinejacc.org)
  • Doppler echocardiography has been utilized not only as a diagnostic tool but also as a monitoring tool, permitting follow-up of the effects of therapeutic interventions. (biomedcentral.com)
  • 3A and add diagnostic information compared to conventional Doppler. (usp.br)
  • Doppler echocardiography is a procedure that uses Doppler ultrasonography to examine the heart. (wikipedia.org)
  • Like Doppler flow, tissue Doppler can be acquired both by spectral analysis (spectral density estimation) as pulsed Doppler and by the autocorrelation technique as colour tissue Doppler (duplex ultrasonography). (wikipedia.org)
  • The objective of this study was to monitor for the presence of cerebral embolism following tourniquet release with transcranial Doppler (TCD) ultrasonography and to establish any possible correlation with echogenic material seen in the left atrium. (asahq.org)
  • Comparative value of Doppler echocardiography and B-type natriuretic peptide assay in the etiologic diagnosis of acute dyspnea. (annals.org)
  • This article reviews the value of Doppler echocardiography in evaluating patients with specific pathologic conditions. (elsevier.com)
  • They described fetal echocardiography, and contrast echocardiography. (mhmedical.com)
  • One of the main advantages of tissue Doppler is that diastolic and systolic function can be measured by the same tool. (wikipedia.org)
  • We showed some time ago that systolic function is not normal in patients with "diastolic heart failure" or HFNEF when more sensitive measures of left ventricular long axis function are made by tissue Doppler recording of the mitral valve annulus ( 2 ). (onlinejacc.org)
  • Since the introduction of Doppler Echocardiography, Nuclear Cardiology and Coronary CT imaging, clinicians and researchers have been searching for ways to improve their use of these important tools in both the diagnosis and treatment of heart disease. (intechopen.com)
  • Tissue Doppler imaging assessment of long axis left ventricular function in hypertensive patients with concentric left ventricular hypertrophy: differential diagnosis with hypertrophic cardiomyopathy. (hindawi.com)
  • Special chapters focus on the differential diagnosis of cyanotic infants and echocardiography specifically for the neonatologist. (frohberg.de)
  • Combined use of routine transmitral and pulmonary venous Doppler patterns in conjunction with tissue Doppler imaging have been claimed to allow bedside diagnosis of diastolic dysfunction. (biomedcentral.com)
  • Natriuretic Peptide and Clinical Evaluation in the Diagnosis of Heart Failure Hemodynamic Profile: Comparison with Tissue Doppler Echocardiography. (bvsalud.org)
  • Blinded comparison of BNP levels and Doppler findings with a confirmatory clinical diagnosis. (acponline.org)
  • 2 cardiologists and 1 pneumonologist, blinded to BNP assay and Doppler results, collaborated to determine the final diagnosis of CHF based on the Framingham criteria with corroborative information from other cardiac and pulmonary function tests. (acponline.org)
  • Takayasu's arteritis in an adult female from Cameroon: diagnosis via Doppler echocardiography. (edu.au)
  • Doppler echocardiography may assist in its diagnosis with good response to steroids. (edu.au)
  • In this study we compared M-Mode and Doppler echocardiography in diagnosis of PDA in children at Aliasghar Hospital in Zahedan and Children hospital in Bandar Abbas for one year. (ac.ir)
  • According to McNemar statistical analysis, there was not an obvious difference between these two methods of echocardiography in PDA diagnosis (p=0.125). (ac.ir)
  • 2D Echo/Doppler study is one of the most important non-invasive investigations used in the diagnosis of heart disease today. (cardiology.com.sg)
  • The authors document the importance of echocardiograhy (ECHO) with special respect to the pulsed Doppler technique (PDE) in the diagnosis of congenital heart diseases. (qxmd.com)
  • The authors conclude that a combination of M-mode, cross-sectional and pulsed Doppler echocardiography permits a comparatively detailed non-invasive diagnosis of the entire spectrum of congenital heart diseases. (qxmd.com)
  • Doppler echocardiography and scintigraphy compared favorably in assessment of fractional filling during early diastole (r = 0.84) and atrial systole (r = 0.85), ratio of early to atrial filling (r = 0.83), diastolic filling period (r = 0.94) and interval from end-diastole to peak early diastolic flow (r = 0.88). (docphin.com)
  • Calculating of left atrial systolic pressure by Doppler Echocardiography. (bvsalud.org)
  • In pure aortic regurgitation (67 patients) the results showed a high correlation coefficient between Doppler and angiographic estimates. (bmj.com)
  • A total of 80 patients with new extensive apical left ventricular wall motion abnormalities on echocardiography who underwent coronary angiography were identified retrospectively. (nih.gov)
  • Patients underwent sequential exercise tests with Doppler echocardiography and ultrafast cine computed tomography (CT). (biomedsearch.com)
  • Doppler echocardiography and CT provide complementary and potentially useful information about right-sided heart pressures and RV ejection fraction during exercise in patients with advanced chronic lung disease. (biomedsearch.com)
  • 76 consecutive SSc patients were assessed in this cohort study by lung function tests, electrocardiogram at rest, lab tests and biomarkers, echocardiography at rest, stress Doppler echocardiography (SDE) and by right heart catheter at rest and during exercise by two different experienced investigators. (ersjournals.com)
  • Stress Doppler echocardiography is a safe and reliable procedure and might be a useful non-invasive tool for the screening for manifest aPAH in SSc patients. (ersjournals.com)
  • The role of combined two-dimensional and pulsed Doppler echocardiography in the postoperative assessment of patients with total anomalous pulmonary venous connection was evaluated. (biomedsearch.com)
  • Combined two-dimensional and Doppler echocardiography is a useful adjunct in the postoperative evaluation of patients with total anomalous pulmonary venous connection. (biomedsearch.com)
  • Fifty nine patients who had been admitted to Seoul National University Hospital from April to October in 1986 were prospectively examined by a pulsed Doppler echocardiography on one day before cardiac catheterization. (koreamed.org)
  • In patients with acute dyspnea, how does the accuracy of Doppler echocardiography compare with bedside B-type natriuretic peptide (BNP) assay for diagnosing decompensated congestive left-heart failure (CHF)? (annals.org)
  • We sought to determine if a novel measurement of pulmonary vascular (PV) capacitance (PVCAP) by Doppler echocardiography predicts all-cause mortality in patients with primary pulmonary arterial (PA) hypertension (PPAH). (ovid.com)
  • Therefore, the purpose of this study was to determine if PVCAP from noninvasive Doppler echocardiography would be a useful measure of survival in patients with PPAH. (ovid.com)
  • The novel measure of PVCAP, as determined by Doppler echocardiography, is a strong noninvasive predictor of mortality in patients with PPAH and adds prognostic value to conventional risk markers. (ovid.com)
  • Early identification of diastolic dysfunction in asymptomatic patients by the use of echocardiography may provide an opportunity to manage the underlying etiology to prevent progression to diastolic heart failure. (onlinejacc.org)
  • Electrocardiography and echocardiography were performed in all patients in these times. (minervamedica.it)
  • Determining the phase of diastolic dysfunction for an individual patient remains difficult because of the interplay between relaxation and preload, which makes the routine pulsed wave Doppler indices useless - particularly in a setting where preloading conditions may change constantly and abruptly, as in many critically ill patients. (biomedcentral.com)
  • Background - Noninvasive assessment of diastolic filling by Doppler echocardiography provides important information about left ventricular (LV) status in selected subsets of patients. (elsevier.com)
  • Methods and Results - One hundred consecutive patients referred for cardiac catheterization underwent simultaneous Doppler interrogation. (elsevier.com)
  • A subset of those patients with E/E' 8 to 15 could be further defined by use of other Doppler data. (elsevier.com)
  • Therefore, Doppler echocardiography and scintigraphy were compared in 25 patients. (docphin.com)
  • Doppler echocardiography is a powerful technique that has great potential for evaluating patients who are acutely ill. (elsevier.com)
  • Kaul, S 1991, ' Doppler echocardiography in critically ill cardiac patients ', Cardiology Clinics , vol. 9, no. 4, pp. 711-732. (elsevier.com)
  • In our study, CFR was assessed by transthoracic Doppler echocardiography (TDE) in 44 patients after the successful percutaneous coronary intervention during the acute AMI phase. (biomedcentral.com)
  • In patients with acute dyspnea, Doppler echocardiography was more accurate than B-type natriuretic peptide assay for diagnosing decompensated congestive left-heart failure. (acponline.org)
  • BNP values were examined along with Doppler analysis of transmitral flow in patients presenting with severe dyspnea. (acponline.org)
  • Routine epicardial two-dimensional echocardiography, Doppler, and Doppler color flow imaging studies were performed before and after cardiopulmonary bypass in 328 patients undergoing operations for congenital heart disease. (duke.edu)
  • After bypass, echo-Doppler color flow imaging disclosed unsuspected residual defects in 22 patients (7%) who were doing well clinically and enabled an attempt at immediate revision of the procedure. (duke.edu)
  • We evaluated diastolic filling patterns using Doppler echocardiography in 520 consecutive patients referred to our laboratory for transthoracic echocardiograms retrospectively and applied the standard guidelines used to characterize left ventricular (LV) diastolic function. (elsevier.com)
  • A study from Nanjing University School of Medicine tested Doppler echocardiography in patients with interstitial lung disease and found that the technique is feasible. (pulmonaryhypertensionnews.com)
  • In the future, clinicians may be able to use B-line quantification via Doppler echocardiography in patients who do not show regurgitation to detect pulmonary hypertension. (pulmonaryhypertensionnews.com)
  • Before echocardiography, physical examination, CXR and ECG were done for the patients. (ac.ir)
  • Fifty-eight patients with a Björk-Shiley (B-S) mitral valve were examined to study applicability of Doppler echocardiography in diagnosing and predicting the severity of prosthetic valve dysfunction. (elsevier.com)
  • To understand the complex relationship between streptococcal infections and neuropsychiatric disorders in children the present study was done on colour Doppler echocardiography of patients with possible post-streptococcal tic disorders . (bvsalud.org)
  • Ten patients (seven with LV hypertrophy) underwent Doppler echocardiography 1 h before, 1 h after, and 1 d after HD. (asnjournals.org)
  • This book provides essential information for using quantitative Doppler echocardiography in routine clinical cardiological practice. (alibris.com)
  • Objectives Our goal was to prospectively compare the accuracy of real-time three-dimensional (3D) color Doppler vena contracta (VC) area and two-dimensional (2D) VC diameter in an in vitro model and in the clinical assessment of mitral regurgitation (MR) severity. (onlinejacc.org)
  • access not the such ebook Basic Concepts in Doppler Echocardiography: Methods of clinical applications based on a multi modality Doppler approach, which is, in Kant, the issue of a response Permissions of way that do requirement and something, and current dead, language of the cosmopolitiques of the owner, as they 're a process. (vintagecarconnection.com)
  • Their ebook Basic Concepts in Doppler Echocardiography: Methods of clinical applications based on a multi modality came been truthfully Too by the seconds they knew but right the return of odds, flaws, and expert because of the scholar. (vintagecarconnection.com)
  • This review focuses on transthoracic Doppler echocardiography as noninvasive method used to assess coronary flow reserve (CFR) in a wide spectrum of clinical settings. (biomedcentral.com)
  • However, these methods are either invasive (intracoronary Doppler flow wire), highly expensive and scarcely available (Positron Emission Tomography) or semi-invasive and scarcely feasible (transesophageal Doppler), thus their clinical use is limited. (biomedcentral.com)
  • Recently the usefulness of transthoracic Doppler echocardiography to assess CFR has been reported in various clinical settings in a large general referral population. (biomedcentral.com)
  • A report from the American Society of Echocardiography's Nomenclature and Standards Committee and The Task Force on Valvular Regurgitation, developed in conjunction with the American College of Cardiology Echocardiography Committee, The Cardiac Imaging Committee Council on Clinical Cardiology, the American Heart Association, and the European Society of Cardiology Working Group on Echocardiography. (ecocardio.com)
  • Transthoracic Doppler-echocardiography (TTE) is the primary method utilized in clinical practice to assess and grade AS severity. (biomedcentral.com)
  • When ultimate clinical outcome was compared to postbypass findings of echo-Doppler color flow imaging, the presence of a residual defect, right or left ventricular dysfunction, or any concern with the heart by echo-Doppler color flow imaging appeared to serve as a predictor of unfavorable outcome (p less than 0.001 for each when compared with absence of these difficulties). (duke.edu)
  • This session develops basic 2D transthoracic echocardiography practice by describing Doppler theory and its clinical applications. (wcea.education)
  • In this chapter we will discuss the usefulness of two dimensional echocardiography and Doppler to evaluate right ventricular function in ischemic heart disease and to diagnose right ventricular infarction and associated complications. (springer.com)
  • 1980) Assessment of asynergy in right ventricular infarction with real time two dimensional echocardiography. (springer.com)
  • Doppler echocardiography of fetal ductus arteriosus constriction versus increased right ventricular output. (freethesaurus.com)
  • Transthoracic echocardiography was performed to assess valve and cardiac function. (hindawi.com)
  • This study was undertaken to assess the contribution of Doppler echocardiography to the quantification of aortic valve regurgitation. (bmj.com)
  • Transthoracic echocardiography at rest and SDE were compared with hemodynamic measurement to assess the value and reliability of SDE in the noninvasive detection of PAH in SSc. (ersjournals.com)
  • Phase contrast CMR may offer an alternative imaging modality to assess bioprosthetic valve EOA when Doppler methods are technically limited or unreliable. (biomedcentral.com)
  • Two-dimensional and pulsed Doppler echocardiography in the postoperative evaluation of total anomalous pulmonary venous connection. (biomedsearch.com)
  • LV filling and pulmonary venous Doppler patterns have been utilized to estimate LV diastolic function, comprising variables as such stiffness, relaxation and even LV filling pressures. (biomedcentral.com)
  • Concomitantly, the pulmonary venous Doppler pattern will change accordingly. (biomedcentral.com)
  • Doppler flow and Echocardiography in Functional cardiac Insufficiency: Assessment of Nisoldipine Therapy II. (thefreedictionary.com)
  • In this study, a head-to-head comparison between M-mode echocardiography and color-coded TDI was performed for assessment of LV dyssynchrony and prediction of response to CRT. (eur.nl)
  • CONCLUSION: The TDI should be utilized to complement conventional echocardiography in the assessment of cardiotoxicity. (minervamedica.it)
  • Real-time three-dimensional (3D) color Doppler allows direct measurement of vena contracta (VC) area and may be more accurate for assessment of mitral regurgitation (MR) than the conventional two-dimensional (2D)-VC diameter measurement. (onlinejacc.org)
  • Assessment of left ventricular diastolic function: comparison of Doppler echocardiography and gated blood pool scintigraphy. (docphin.com)
  • Thus routine intraoperative echo-Doppler color flow imaging is useful in aiding the planning, conduct, and assessment of results in operations for congenital heart disease. (duke.edu)
  • Utility of Doppler echocardiography and tissue Doppler imaging in the estimation of diastolic function in heart failure with normal ejection fraction: a comparative Doppler-conductance catheterization study. (semanticscholar.org)
  • METHODS: Transthoracic Doppler echocardiography was used to register coronary flow in 10 age-matched healthy controls and 7 neonates before and 1 day after BV. (lu.se)
  • Your ebook Basic Concepts in Doppler Echocardiography: Methods visited a killer that this box could just avoid. (vintagecarconnection.com)
  • Contact The ebook Basic Concepts in Doppler Echocardiography: Methods to game, the frontier for origin, and the including history trying us down towards the tourism is plasmalemma of what is a Vigil code not new. (vintagecarconnection.com)
  • CMR-derived EOA may be an important parameter of prosthetic valve function when Doppler methods are unobtainable or unreliable. (biomedcentral.com)
  • Effects of Balloon Valvuloplasty on Coronary Blood Flow in Neonates With Critical Pulmonary Valve Stenosis Assessed With Transthoracic Doppler Echocardiography. (lu.se)
  • Transthoracic Doppler echocardiography is rapidly gaining appreciation as popular tool to measure CFR both in stenosed and normal epicardial coronary arteries (predominantly in left anterior descending coronary artery). (biomedcentral.com)
  • In these diseases, noninvasive transthoracic Doppler echocardiography allows for serial CFR evaluations to explore the effect of various pharmacological therapies. (biomedcentral.com)
  • Using a noninvasive and readily available tool, transthoracic Doppler echocardiography , aortic stiffness and coronary flow reserve can easily be simultaneous evaluated. (freethesaurus.com)
  • As the gold standard, right heart catheterization has been the primary mode of detecting an increase in pulmonary artery pressure, but other less invasive techniques such as transthoracic Doppler echocardiography may be useful to detect high pressure as well. (pulmonaryhypertensionnews.com)
  • Tagged Interstitial Lung Disease , Non-invasive Doppler Echocardiography , transthoracic Doppler echocardiography . (pulmonaryhypertensionnews.com)
  • Non-invasive quantification of aortic regurgitation by Doppler echocardiography. (bmj.com)
  • IMSEAR at SEARO: Detection and quantification of mitral regurgitation by pulsed Doppler echocardiography. (who.int)
  • Arora R, Manoharan S, Mulloth R, Sethi KK, Khalilullah M. Detection and quantification of mitral regurgitation by pulsed Doppler echocardiography. (who.int)
  • TDI can be obtained by either spectral or colour Doppler techniques. (biomedcentral.com)
  • Doppler signals can be colour-coded to enhance visualisation of blood flow (termed Doppler colour-flow mapping) and is the best way to determine the degree of narrowing, calcification or leakage of a valve. (cardiology.com.sg)
  • Colour Doppler echocardiography in children with group A streptococcal infection related tic disorders. (bvsalud.org)
  • Conclusions Measurement of VC area is feasible with real-time 3D color Doppler and provides a simple parameter that accurately reflects MR severity, particularly in eccentric and clinically significant MR where geometric assumptions may be challenging. (onlinejacc.org)
  • We conclude the high pressure gradient group is considered to be a reserved cohort of reoperation and periodical measurement of the pressure gradient via Doppler echocardiography can predict prosthetic valve dysfunction before it deteriorates significantly. (elsevier.com)
  • TTE and CPET data were used (1) to determine agreement between V̇o 2 and Doppler-derived LV function indices (eg, stroke volume index [SVI] and cardiac index [CI]) and (2) to determine agreement between temporal changes in peak V̇o 2 and LV function indices. (ovid.com)
  • Doppler derived EOA was determined by dividing the stroke volume by the continuous wave Doppler TVI. (biomedcentral.com)
  • The aim of this study was to identify, through conventional echocardiography and TDI, parameters to use as early "signs" of cardiotoxicity. (minervamedica.it)
  • Normal blood flow in the vessels may be broken due to various reasons, but by means of the Doppler method a whole set of parameters can be analyzed, and that helps diagnose cardiovascular diseases such as ischemic heart disease , aortic aneurysm, portal hypertension, and atherosclerotic vascular disease) with maximum accuracy in their early stages. (cardiogod.com)
  • They used Doppler echocardiography to see if the presence of B-lines and the distance between the lines related to an increased pulmonary artery pressure. (pulmonaryhypertensionnews.com)
  • This technique is used for recording left ventricular filling (E wave) and e' (mitral annular tissue Doppler) simultaneously. (johnsonfrancis.org)
  • The authors report the development of a quantitative method to noninvasively evaluate left ventricular (LV) regional pumping ability by duplex Doppler echocardiography. (elsevier.com)
  • The present paper presents a novel pathway for patient-specific CFD modelling of the left ventricle (LV), using 4D transthoracic echocardiography (TTE) as input modality. (diva-portal.org)
  • This same hemodynamic information to calculate PVCAP can be derived from Doppler echocardiography. (ovid.com)
  • In those with normal cardiac function by Doppler echocardiography , 32% had enlarged hearts. (freethesaurus.com)
  • It explains the role of Doppler in the comprehensive evaluation of cardiac function, valve pathology, and basic haemodynamics. (wcea.education)
  • Practical Echocardiography for Cardiac Sonographers Shindler DM, Shindler OI, Wright A. Shindler D.M., & Shindler O.I., & Wright A(Eds. (mhmedical.com)
  • A - C ) Color Doppler imaging and continuous wave (CW) Doppler echocardiography. (nature.com)
  • An advantage of Doppler echocardiography is that it can be used to measure blood flow within the heart without invasive procedures such as cardiac catheterization. (wikipedia.org)
  • We compared haemodynamics, Doppler echocardiography (DE), oxygenation, dyspnoea and quality of life indices, and 6 min walk distance (6MWD) before and 12 weeks after parenteral treprostinil. (bmj.com)
  • Pulsed Doppler echocardiography was performed using an apical four chamber view with the sample volume at the level of the mitral anulus. (docphin.com)