Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
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.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
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 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.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
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)
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.
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.
The valve between the left atrium and left ventricle of the heart.
Backflow of blood from the RIGHT VENTRICLE into the RIGHT ATRIUM due to imperfect closure of the TRICUSPID VALVE.
Pathological conditions involving any of the various HEART VALVES and the associated structures (PAPILLARY MUSCLES and CHORDAE TENDINEAE).
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.
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.
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
The circulation of blood through the CORONARY VESSELS of the HEART.
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.
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.
Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.
Pathological conditions involving the HEART including its structural and functional abnormalities.
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.
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 short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.
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 flow of BLOOD through or around an organ or region of the body.
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.
Function of the human eye that is used in bright illumination or in daylight (at photopic intensities). Photopic vision is performed by the three types of RETINAL CONE PHOTORECEPTORS with varied peak absorption wavelengths in the color spectrum (from violet to red, 400 - 700 nm).
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.
Type of vision test used to determine COLOR VISION DEFECTS.
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)
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).
Period of contraction of the HEART, especially of the HEART VENTRICLES.
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.
Defects of color vision are mainly hereditary traits but can be secondary to acquired or developmental abnormalities in the CONES (RETINA). Severity of hereditary defects of color vision depends on the degree of mutation of the ROD OPSINS genes (on X CHROMOSOME and CHROMOSOME 3) that code the photopigments for red, green and blue.
Color of hair or fur.
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.
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 chambers of the heart, to which the BLOOD returns from the circulation.
An infant during the first month after birth.
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.
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.
Contractile activity of the MYOCARDIUM.
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 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.
Substances used to allow enhanced visualization of tissues.
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.
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.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
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.
Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (Mayo Clin Proc 1993;68:221-40)
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).
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 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 valve consisting of three cusps situated between the right atrium and right ventricle of the heart.
A device that substitutes for a heart valve. It may be composed of biological material (BIOPROSTHESIS) and/or synthetic material.
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.
The hemodynamic and electrophysiological action of the right HEART VENTRICLE.
Color of the iris.
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.
Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.
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).
Coloration or discoloration of a part by a pigment.
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.
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.
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).
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.
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.
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)
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).
Elements of limited time intervals, contributing to particular results or situations.
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.
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.
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).
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.
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.
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.
The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.
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.
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).
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.
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.
Increased VASCULAR RESISTANCE in the PULMONARY CIRCULATION, usually secondary to HEART DISEASES or LUNG DISEASES.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
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.
Surgery performed on the heart.
Examinations used to diagnose and treat heart conditions.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Ear-shaped appendage of either atrium of the heart. (Dorland, 28th ed)
Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.
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.
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.
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.
The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).
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.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
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 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.
Formation and development of a thrombus or blood clot in the blood vessel.
The hemodynamic and electrophysiological action of the HEART VENTRICLES.
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 condition in which HEART VENTRICLES exhibit impaired function.
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.
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 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.
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 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.
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.
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 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.
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 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.
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.
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 veins and arteries of the HEART.
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.
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.
A valve situated at the entrance to the pulmonary trunk from the right ventricle.
The span of viability of a tissue or an organ.
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.
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.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
The hemodynamic and electrophysiological action of the RIGHT ATRIUM.
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.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.
Motion pictures of the passage of contrast medium through blood vessels.
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.
Radiography of blood vessels after injection of a contrast medium.
The circulation of BLOOD, of both the mother and the FETUS, through the PLACENTA.
The muscular membranous segment between the PHARYNX and the STOMACH in the UPPER GASTROINTESTINAL TRACT.
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.
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)
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.
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 blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.
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.
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.
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.
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.
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)
Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.
Pathological processes involving any part of the AORTA.
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 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 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.
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.
The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
Coloring, shading, or tinting of prosthetic components, devices, and materials.
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.
Any technique by which an unknown color is evaluated in terms of standard colors. The technique may be visual, photoelectric, or indirect by means of spectrophotometry. It is used in chemistry and physics. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Backflow of blood from the PULMONARY ARTERY into the RIGHT VENTRICLE due to imperfect closure of the PULMONARY VALVE.
Heart failure caused by abnormal myocardial relaxation during DIASTOLE leading to defective cardiac filling.
The vessels carrying blood away from the heart.
The failure of a FETUS to attain its expected FETAL GROWTH at any GESTATIONAL AGE.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
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.
The period during a surgical operation.
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.
General or unspecified injuries to the heart.
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.
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.
The circulation of the BLOOD through the LUNGS.
The main trunk of the systemic arteries.
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 heart rate of the FETUS. The normal range at term is between 120 and 160 beats per minute.
The condition of an anatomical structure's being dilated beyond normal dimensions.
Blocking of a blood vessel by air bubbles that enter the circulatory system, usually after TRAUMA; surgical procedures, or changes in atmospheric pressure.
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.
Coloration of the skin.
The circulation of the BLOOD through the MICROVASCULAR NETWORK.
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.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.

QT dispersion in patients with chronic heart failure: beta blockers are associated with a reduction in QT dispersion. (1/884)

OBJECTIVE: To compare QT dispersion in patients with impaired left ventricular systolic function and in matched control patients with normal left ventricular systolic function. DESIGN: A retrospective, case-control study with controls matched 4:1 for age, sex, previous myocardial infarction, and diuretic and beta blocker treatment. SETTING: A regional cardiology centre and a university teaching hospital. PATIENTS: 25 patients with impaired left ventricular systolic function and 100 patients with normal left ventricular systolic function. MAIN OUTCOME MEASURES: QT and QTc dispersion measured by three methods: the difference between maximum and minimum QT and QTc intervals, the standard deviation of QT and QTc intervals, and the "lead adjusted" QT and QTc dispersion. RESULTS: All measures of QT/QTc dispersion were closely interrelated (r values 0.86 to 0.99; all p < 0.001). All measures of QT and QTc dispersion were significantly increased in the patients with impaired left ventricular systolic function v controls (p < 0.001): 71.9 (6.5) (mean (SEM)) v 46.9 (1.7) ms for QT dispersion, and 83.6 (7.6) v 54.3 (2.1) ms(-1-2) for QTc dispersion. All six dispersion parameters were reduced in patients taking beta blockers (p < 0.05), regardless of whether left ventricular function was normal or impaired-by 9.4 (4.6) ms for QT dispersion (p < 0.05) and by 13.8 (6. 5) ms(-1-2) for QTc dispersion (p = 0.01). CONCLUSIONS: QT and QTc dispersion are increased in patients with systolic heart failure in comparison with matched controls, regardless of the method of measurement and independently of possible confounding factors. beta Blockers are associated with a reduction in both QT and QTc dispersion, raising the possibility that a reduction in dispersion of ventricular repolarisation may be an important antiarrhythmic mechanism of beta blockade.  (+info)

Three-dimensional reconstruction of the color Doppler-imaged vena contracta for quantifying aortic regurgitation: studies in a chronic animal model. (2/884)

BACKGROUND: The purpose of this study was to investigate the use of 3-dimensional (3D) reconstruction of color Doppler flow maps to image and extract the vena contracta cross-sectional area to determine the severity of aortic regurgitation (AR) in an animal model. Evaluation of the vena contracta with 2-dimensional imaging systems may not be sufficiently robust to fully characterize this region, which may be asymmetrically shaped. METHODS AND RESULTS: In 6 sheep with surgically induced chronic AR, 18 hemodynamically different states were studied. Instantaneous regurgitant flow rates were obtained by aortic and pulmonary electromagnetic flowmeters (EMFs) as reference standards, and aortic regurgitant effective orifice areas (EOAs) were determined from EMF regurgitant flow rates divided by continuous-wave (CW) Doppler velocities. Composite video data for color Doppler imaging of the aortic regurgitant flows were transferred into a TomTec computer after computer-controlled 180 degrees rotational acquisition. After the 3D data transverse to the flow jet were sectioned, the smallest proximal jet cross section was identified for direct measurement of the vena contracta area. Peak regurgitant flow rates and regurgitant stroke volumes were calculated as the product of these areas and the CW Doppler peak velocities and velocity-time integrals, respectively. There was an excellent correlation between the 3D-derived vena contracta areas and reference EOAs (r=0.99, SEE=0.01 cm2) and between 3D and reference peak regurgitant flow rates and regurgitant stroke volumes (r=0.99, difference=0.11 L/min; r=0.99, difference=1.5 mL/beat, respectively). CONCLUSIONS: 3D-based determination of the vena contracta cross-sectional area can provide accurate quantification of the severity of AR.  (+info)

Transcatheter closure of muscular ventricular septal defects with the amplatzer ventricular septal defect occluder: initial clinical applications in children. (3/884)

OBJECTIVES: The aim of this study was to close muscular ventricular septal defects (MVSDs) in children, with a new device, the Amplatzer ventricular septal defect occluder (AVSDO). BACKGROUND: The design of previously used devices for transcatheter closure of MVSDs is not ideal for this purpose and their use has been limited by several drawbacks. METHODS: Six patients, aged 3 to 10 years, with MVSDs underwent transcatheter closure using the AVSDO. The device is a modified self-centering and repositionable Amplatzer device that consists of two low profile disks made of Nitinol wire mesh with a 7-mm connecting waist. The prosthesis size (connecting waist diameter) was chosen according to the measured balloon stretched VSD diameters. A 6-F or 7-F sheath was used for the delivery of the AVSDO. Fluoroscopy and transesophageal echocardiography were utilized for optimal guidance. RESULTS: The location of the defect was midmuscular in five patients and beneath the pulmonary valve in one. The balloon stretched MVSD diameter ranged from 6 to 11 mm. Device placement was successful in all patients, and complete occlusion occurred in all six patients (95% confidence interval 54.06% to 100%). Two patients developed transient complete left bundle branch block. No other complications were observed. CONCLUSIONS: This encouraging initial clinical success indicates that the AVSDO is a promising device for transcatheter closure of MVSDs in children. Further clinical trials and longer follow-up are needed before the widespread use of this technique can be recommended.  (+info)

Mechanisms of retarded apical filling in acute ischemic left ventricular failure. (4/884)

BACKGROUND: We examined the hypothesis that retardation of apical filling as measured by color M-mode Doppler echocardiography in the diseased left ventricle (LV) reflects a decrease in the intraventricular mitral-to-apical pressure gradient. METHODS AND RESULTS: In 9 open-chest anesthetized dogs, micromanometers were placed near the mitral tip and in the apical region. From the color M-mode Doppler images, the time delay (TD) between peak velocity at the mitral tip and the apical region was determined as an index of LV flow propagation. Acute ischemic LV failure was induced by coronary microembolization. Induction of ischemia caused a marked increase in LV end-diastolic pressure and a decrease in LV ejection fraction. The time constant of LV isovolumic apical pressure decay (tau) increased from 31+/-8 to 49+/-16 ms (P<0.001). The peak early diastolic mitral-to-apical pressure gradient (DeltaPLVmitral-apex) decreased from 1.9+/-0.9 to 0.7+/-0.5 mm Hg (P<0.01), and TD increased from 5+/-3 to 57+/-26 ms (P<0.001). The slowing of flow propagation was limited to the apical portion of the LV cavity. The TD correlated with DeltaPLVmitral-apex (r=-0.94, P<0.01) and with tau (r=0.92, P<0.01). Before ischemia, the mitral-to-apical flow propagation velocity far exceeded the velocity of the individual blood cells, whereas during ischemia, flow propagation velocity approximated the blood velocity. CONCLUSIONS: Retardation of apical filling in acute ischemic failure was attributed to a decrease in the mitral-to-apical driving pressure, reflecting slowing of LV relaxation. The slowing of flow propagation appeared to represent a shift in apical filling from a pattern of column motion to a pattern dominated by convection.  (+info)

Primary right atrial angiosarcoma mimicking acute pericarditis, pulmonary embolism, and tricuspid stenosis. (5/884)

A 29 year old white man presented to the emergency room with new onset pleuritic chest pain and shortness of breath. He was initially diagnosed as having viral pericarditis and was treated with non-steroidal anti-inflammatory drugs. A few weeks later he developed recurrent chest pain with cough and haemoptysis. Chest radiography, cardiac examination, transthoracic and transoesophageal echocardiography pointed to a mass that arose from the posterior wall of the right atrium, not attached to the interatrial septum, which protruded into the lumen of the right atrium causing intermittent obstruction of inflow across the tricuspid valve. Contrast computed tomography of the chest showed a right atrial mass extending to the anterior chest wall. The lung fields were studded with numerous pulmonary nodules suggestive of metastases. A fine needle aspiration of the pulmonary nodule revealed histopathology consistent with spindle cell sarcoma thought to originate in the right atrium. Immunohistochemical stains confirmed that this was an angiosarcoma. There was no evidence of extracardiac origin of the tumour. The patient was treated with chemotherapy and radiation. This case highlights the clinical presentation, rapid and aggressive course of cardiac angiosarcomas, and the diagnostic modalities available for accurate diagnosis.  (+info)

Combined aortic and mitral stenosis in mucopolysaccharidosis type I-S (Ullrich-Scheie syndrome). (6/884)

The genetic mucopolysaccharidosis syndromes (MPS) are autosomal recessive inborn errors of metabolism. Heart valve involvement in MPS is not uncommon but only a few case reports of successful cardiac surgery are available. In particular, reports of combined aortic and mitral stenosis associated with MPS type I-S are very rare. Both type I and type VI MPS are associated with significant left sided valvar heart disease that requires surgical valve replacement because of irregular valve thickening, fibrosis, and calcification. A 35 year old man had severe mitral valve stenosis after successful surgical replacement of a stenotic aortic valve. Valvar heart disease was investigated by cardiac ultrasound and left heart catheterisation. Histomorphological characterisation of the affected mitral valve was performed. The case illustrates typically associated clinical features of cardiac and extracardiac abnormalities found in MPS type I-S.  (+info)

Clinical manifestation and survival of patients with idiopathic bilateral atrial dilatation. (7/884)

We studied the histories of eight patients who lacked clear evidence of cardiac abnormalities other than marked bilateral atrial dilatation and atrial fibrillation, which have rarely been discussed in the literature. From the time of their first visit to our hospital, the patients' chest radiographs and electrocardiograms showed markedly enlarged cardiac silhouettes and atrial fibrillation, respectively. Each patient's echocardiogram showed a marked bilateral atrial dilatation with almost normal wall motion of both ventricles. In one patient, inflammatory change was demonstrated by cardiac catheterization and endomyocardial biopsy from the right ventricle. Seven of our eight cases were elderly women. Over a long period after the diagnosis of cardiomegaly or arrhythmia, diuretics or digitalis offered good results in the treatment of edema and congestion in these patients. In view of the clinical courses included in the present study, we conclude that this disorder has a good prognosis.  (+info)

Quantitative systolic and diastolic transmyocardial velocity gradients assessed by M-mode colour Doppler tissue imaging as reliable indicators of regional left ventricular function after acute myocardial infarction. (8/884)

AIMS: The aim of this study was to determine whether myocardial velocity gradients assessed by M-mode colour Doppler tissue imaging could be of clinical relevance and represent reliable indicators of regional left ventricular function after acute myocardial infarction. METHODS AND RESULTS: Among 64 consecutive patients with a first acute myocardial infarction, in 50 who had a marked asynergy in the parasternal short-axis view at the mid-papillary muscle level, myocardial velocities and velocity gradients were assessed in the anteroseptum and posterior wall by M-mode Doppler tissue imaging. Similar measurements were obtained in 11 matched healthy volunteers who served as a control group. In patients with anterior myocardial infarction, the peak myocardial velocity gradient in the anteroseptum was significantly lower when compared with controls (mean +/- [SD] 0.0 +/- 0.5 vs 1.1 +/- 0.7 s-1 during systole, P < 0.01; and 0.3 +/- 0.6 vs 2.0 +/- 0.5 s-1 during diastole, P < 0.01). Conversely, the peak systolic myocardial velocity gradient in the posterior wall was significantly higher than in controls (2.6 +/- 1.2 vs 1.8 +/- 1.2 s-1, P < 0.05). In patients with inferior myocardial infarction, the peak velocity gradient in the posterior wall was significantly lower when compared with healthy subjects (0.9 +/- 0.6 vs 1.8 +/- 1.2 s-1 during systole and 1.4 +/- 1.4 vs 4.9 +/- 1.2 s-1 during diastole, both P < 0.01). The peak systolic tissue velocity gradient in the anteroseptum was significantly higher than in controls (2.1 +/- 1.0 vs 1.1 +/- 0.7 s-1, P < 0.01). CONCLUSION: The present study indicates that myocardial velocity gradients assessed by M-mode Doppler tissue imaging are of clinical relevance for the characterization of ischaemic myocardial dysfunction after infarction and may provide quantitative assessment of segmental left ventricular function in this clinical setting.  (+info)

TY - JOUR. T1 - Automatic quantification of aortic regurgitation using 3D full volume color doppler echocardiography. T2 - a validation study with cardiac magnetic resonance imaging. AU - Choi, Jaehuk. AU - Hong, Geu Ru. AU - Kim, Minji. AU - Cho, In Jeong. AU - Shim, Chi Young. AU - Chang, Hyuk Jae. AU - Mancina, Joel. AU - Ha, Jong Won. AU - Chung, Namsik. PY - 2015/10/24. Y1 - 2015/10/24. N2 - 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. The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic regurgitation (AR). Thirty-two patients with more than a moderate degree of AR were enrolled. AR volume was measured by (1) two-dimensional-CDE, using the proximal isovelocity surface area (PISA) and (2) real-time 3D-FVCDE with (3) phase-contrast cardiac magnetic resonance imaging ...
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. ...
Recently, the PISA method, based on the conservation of mass, was validated clinically to measure the ERO area in mitral (14,16)and tricuspid (20)regurgitation. It has been used also in mitral stenosis (19), ventricular septal defect (17)and prosthetic regurgitation (39). The PISA method is particularly attractive because of its simplicity (14). Experimental studies have suggested that the PISA method may be of value in the quantitation of AR (22,40). The proximal FC region is considered technically difficult to access in AR (41), but in this study it was measurable in 90% of patients and adequate for calculation of the ERO in 83% of patients. This feasibility is slightly lower than that found in mitral regurgitation (14,16), because, in contrast to its mitral counterpart, the aortic FC may be shadowed by thickened valvular tissue.. The present study is, to our knowledge, the first to apply the PISA method in a large number of patients with AR. The ERO area calculated by the PISA method ...
Proximal Isovelocity Surface Area (PISA) method is based on the continuity equation. When a flow passes through a narrow orifice, as it approaches the narrowest region, there is a flow convergence and flow acceleration. PISA is the surface area of the hemisphere at the aliasing region of the flow convergence. PISA increases as the flow increases and also with lower aliasing velocity. To reduce errors in measurement, smaller aliasing velocity has to be set, to get higher PISA measurement with lower chance for errors.. Regurgitant flow rate can be calculated as:. 2 Pi r2 x Valiasing. Radius is measured from the orifice to point of colour change. If the flow convergence is not a true hemisphere, the angle subtended by the flow convergence at the orifice has to be measured and divided by 180 to get a correction factor. Good correlation between angiographic estimates of regurgitant flow and PISA based estimates have been reported.. ...
Previous studies have demonstrated that the size of the regurgitant jet, as it emerges from the orifice, bears a consistent relation to the size of the orifice itself (10-12). However, the regurgitant mitral orifice is often irregularly shaped, therefore making it difficult to estimate its area accurately using 1 or 2 diameter measurements. In our in vitro study, we demonstrate that the orifice shape directly affects the shape of the proximal regurgitant jet. As shown in Figure 1, the shape of the 3D-VC area clearly reflects the shape of the rigid orifice. As such, the relation between a single VC diameter and actual regurgitant severity is poor when the regurgitant orifice shape is highly irregular. This limitation is important since the regurgitant orifice is commonly asymmetric (89% of cases) as shown in this clinical study. In support of this observation, the 3D-VC area demonstrated a better relation to EROA than 2D-VC diameter over a wide range of sphericity index.. Previous studies have ...
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Insufficient data describe the relationship of hemodynamic parameters to left ventricular (LV) diastolic flow propagation velocity (Vp) measured using color M-mode Doppler echocardiography.. Go to the Article ...
The recent implementation of new Doppler echocardiographic methods for the assessment of diastolic function has improved our understanding of this complex entity. Standard indices of transmitral flow are hampered by their dependency on loading conditions and left ventricular (LV) relaxation and have therefore been unable to differentiate a patient with normal (normal relaxation and preload) versus pseudonormal (impaired relaxation and increased preload) LV filling (1). More recently, the velocity of flow propagation into the LV (Vp) has been shown to provide an estimate of LV relaxation (2,3). Takatsuji et al. (4)studied a large group of patients with normal relaxation, delayed relaxation and pseudonormal pulsed Doppler patterns of LV filling confirmed by hemodynamic findings. While pulsed Doppler indices showed the typical U-shaped distribution from normal to delayed relaxation in pseudonormal patients, color M-mode Doppler Vp was equally low between the last two groups. Furthermore, their ...
Nicolle, A P and Sampedrano, C C and Fontaine, J J and Tessier-Vetzel, D and Goumi, V and Pelligand, L and Pouchelon, J L and Chetboul, V (2005) Longitudinal left ventricular myocardial dysfunction assessed by 2D colour tissue Doppler imaging in a dog with systemic hypertension and severe arteriosclerosis. JOURNAL OF VETERINARY MEDICINE SERIES A-PHYSIOLOGY PATHOLOGY CLINICAL MEDICINE, 52 (2). pp. 83-87. Full text not available from this repository ...
This is the first multicenter study to evaluate the interobserver agreement of the quantitative parameters of VC width and PISA to differentiate severe from nonsevere MR. We found that classification of MR as severe as opposed to nonsevere using the quantitative CFD parameters of VC and PISA yielded only fair interobserver agreement (kappa: 0.28 to 0.37). The interobserver agreement for qualitative assessment for identifying severe from nonsevere MR was similar to the quantitative methods (kappa: 0.32). Our study group was composed of clinically experienced, practicing echocardiologists from 11 different academic institutions. Furthermore, we found that the interobserver agreement among echocardiologists practicing and instructing within the same institution was similar to the multicenter interobserver agreement and inferior to previously reported studies from single institutions validating the use of PISA and VC (3,6-11).. The VC width and EROA calculated by PISA are both affected by valve ...
Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The Merck Manual was first published in 1899 as a service to the community. The legacy of this great resource continues as the Merck Manual in the US and Canada and the MSD Manual outside of North America. Learn more about our commitment to Global Medical Knowledge.. ...
Introduction: Hydrodynamic theory predicts fluid approaches a point orifice with accelerating velocity in hemispheric shells, forming the basis for the proximal isovelocity surface area (PISA) method to quantify valve regurgitation. Previous CFD and in vitro work has shown that with a finite, non-point orifice, there is a small, systematic underestimation of flow that is approximately the ratio of contour velocity (va) to maximal orifice velocity (vo), e.g., roughly an 8% error if a 40 cm/s contour is used with a 5 m/s jet. The PISA method is further questioned in the setting of noncircular orifices, with concerns of further underestimation. We sought to quantify this impact with CFD.. Hypothesis: Application of standard PISA analysis to an elliptical orifice leads to further flow underestimation, but the magnitude is negligible.. Methods: Mathematical modeling of flow through a finite elliptical orifice was computed using the open-source incompressible flow solver Nalu. Forty-five permutations ...
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Chung F, Memtsoudis SG, Ramachandran SK, Nagappa M, Opperer M, Cozowicz C, Patrawala S, Lam D, Kumar A, Joshi GP, Fleetham J, Ayas N, Collop N, Doufas AG, Eikermann M, Englesakis M, Gali B, Gay P, Hernandez AV, Kaw R, Kezirian EJ, Malhotra A, Mokhlesi B, Parthasarathy S, Stierer T, Wappler F, Hillman DR, Auckley D. Society of Anesthesia and Sleep Medicine Guidelines on Preoperative Screening and Assessment of Adult Patients With Obstructive Sleep Apnea. Anesth Analg. 2016; 123(2):452-73.. Cobey FC; Ashihkmina E; Edrich T; Fox J; Shook D; Bollen B; Breeze JL; Ursprung WWS; Shernan SK; The Mechanism of Mitral Regurgitation Influences the Temporal Dynamics of the Vena Contracta Area as Measured with Color Flow Doppler. ANESTH ANALG. 2016; 122(2): 321-329 ...
In this investigation, we examined the relationship between color M-mode-derived Velprop of the main PA and downstream resistance. The goal was to obtain a noninvasive means of estimating PVR. Using mathematical modeling, we showed that pressure traces along an elastic artery exhibit a time lag and that this time lag should have theoretical limits of between 6 and 18 ms for arterial lengths between 2 and 5 cm. We also showed that pressure and center-line velocity time-traces within the elastic artery are well correlated in time, indicating that velocity traces can be used to compute a velocity propagation parameter that should be equivalent to pressure pulse propagation. The subsequent in vitro studies demonstrated that color M-mode imaging can be used to measure this Velprop, and that Velprop correlates well to downstream resistance. Finally, we obtained preliminary clinical data that showed good correlation between color M-mode-derived Velprop and PVR. To our knowledge, these studies represent ...
BACKGROUND: The American Society of Echocardiography (ASE) guidelines suggest the use of several echocardiographic methods to assess mitral regurgitation severity using an integrated approach, without guidance as to the weighting of each parameter. The purpose of this multicenter prospective study was to evaluate the recommended echocardiographic parameters against a reference modality and develop and validate a weighting for each echocardiographic measure of mitral regurgitation severity. METHODS: This study included 112 patients who underwent evaluation with echocardiography and magnetic resonance imaging (MRI). Echocardiographic parameters recommended by the ASE were included and compared with MRI-derived regurgitant volume (MRI-RV). RESULTS: Echocardiographic parameters that correlated best with MRI-RV were proximal isovelocity surface area (PISA) radius (r = 0.65, P | .0001), PISA-derived effective regurgitant orifice area (r = 0.65, P | .0001), left ventricular end-diastolic volume (r = 0.56, P |
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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. ...
Echocardiography is currently the technique of choice to assess the etiology and severity of mitral regurgitation (MR). Multiple 2D and Doppler parameters are assessed in an integrated fashion and the proximal flow convergent zone of the mitral regurgitation jet is used to calculate effective regurgitant orifice area and regurgitant volume. These measurements have been shown to have important prognostic information. In the last two years, the development of transesophageal imaging with 3D capability has allowed a better visualization of mitral leaflet pathology. Color Doppler 3D studies have shown that 2D methods generally underestimate mitral regurgitant volume. Magnetic resonance techniques have recently been developed to quantitate flow and calculate regurgitant volumes.. The purpose of this study is to evaluate newer methods of quantitating mitral regurgitation severity using real-time 3D echocardiography (RT3DE) and cardiac magnetic resonance imaging (CMR). Although RT3DE measurements have ...
Postpartum Takotsubo cardiomyopathy is mainly induced by drugs that enhance sympathetic nervous activity. We report a novel case of postpartum inverted Takotsubo cardiomyopathy triggered by intravenous atropine administration resulting in acute pulmonary edema. Cardiac troponin I and beta-type natriuretic peptide were elevated. Transthoracic color Doppler echocardiography demonstrated a nondilated left ventricle with mid-basal akinesis, a hyperdynamic apex, and moderate-to-severe mitral regurgitation likely linked to papillary muscle dysfunction. Coronary computed tomography angiography revealed normal coronary arteries. Atropine inhibits the parasympathetic nervous system, alters the autonomic system balance, and, thus, leads to increased sympathetic nervous activity, which seems to have been the cause of Takotsubo cardiomyopathy in this patient. Atropine should be listed among the drugs triggering Takotsubo cardiomyopathy. ...
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PURPOSE: To document differences in color Doppler flow and gray-scale ultrasonographic (US) features between benign and malignant axillary lymph nodes in women with primary breast cancer. MATERIALS AND METHODS: The longitudinal-transverse axis ratio and hilar status on color Doppler flow and gray-scale US images were prospectively studied for each of 145 axillary nodes in 135 women (74 palpable nodes in 69 women, 71 nonpalpable nodes in 66 women) with primary breast cancer. Intranodal flow distribution was described as peripheral, central, or central perhilar. Resistive and pulsatility indexes and peak systolic velocity were documented. For comparison of benign and malignant features, nodes were divided into three groups: palpable and nonpalpable, palpable, and nonpalpable. RESULTS: Color flow was demonstrated equally well in benign and malignant axillary lymph nodes for all three groups. For all nodes, peripheral flow was significantly higher in malignant (118 of 153 nodes [77%]) than benign ...
To certify the continuity between the normal and prolapsed mitral valves (MVP), two-dimensional and color Doppler echocardiography (2-DE and CDE) were performed for healthy 250 male subjects of 13 years old. The distance from the plane of the mitral annulus to the coaptation (c) and the grade of systolic ballooning of the anterior mitral leaflet as expressed by the maximum distance between the leaflet and the straight line connecting the anterior mitral ring with the point of coaptation (d) were measured in the long-axis 2-DE. Mitral regurgitation (MR) was evaluated by CDE. Distribution of c was between +10 and -3 mm, and d was between +5 and -3 mm (minus denotes prolapse toward the left atrium). An approximately normal distribution was found in both parameters c and d. The incidence of MVP varied from 3 to 13% according to the strictness of the criteria for MVP. Subjects with MR from the posterior commissure showed the coaptation significantly displaced toward the atrium compared with the rest of
Evolution of two-dimensional and color Doppler echocardiography identified the typical features of Endomyocardial Fibrosis (EMF) such as dense ventricular apical fibrosis, dysfunction of atrioventricular valve and sub-valvular apparatus and cavity dimensions. This is the tool used most for the diagnosis of EMF in areas where the disease is endemic in Africa. Today echocardiography is used as a screening tool to identify cases of EMF at the community level and it could be confirmed at the bed side. Background of these cases highlighted the echocardiographic features of EMF in different age groups and the oldest one reported at the age of 85 years in a female in advanced stage at this coastal district of Thoothukudi in India.
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The first section of the book addresses the basics of TEE. The topics range from the physics of ultrasound to the basic TEE examination, and to more commonly encountered anatomic variants and artifacts. The chapter that describes the controls on the ultrasound machine has many TEE images representative of how manipulation of a certain control changes the picture and is most helpful in understanding how to optimize the image acquired. The chapter entitled Quantitative Echocardiography, which includes applications of Doppler technology in the assessment of stenotic versus regurgitant lesions (specifically the proximal isovelocity surface area, or PISA, method) and equations necessary for intracardiac pressure measurements, is a detailed yet compact introduction to subsequent sections in which various pathologies are addressed individually.. ...
Department of Cardiology, JIPMER was established as an independent department on 18th April 1987. Cardiac catheterization, angiography and interventions started in October 1987 using a Mobile C arm. First Cardiac Cath Lab was established in January 1995. Colour Doppler Echocardiography and Trans Esophageal Echocardiography started in September 1995. DM (Cardiology) course was started in 2002. Cardiac Electrophysiology and Radiofrequency ablation was started in 1997. In March 2009, the department shifted to the new Super Specialty Block.. ...
Trans-thoracic colour Doppler echocardiography revealed continuous turbulence at the apex of the right ventricle, without right ventricular dilation or pulmonary hypertension.. Coronary angiography showed a severely dilated and tortuous LAD and magnetic resonance imaging confirmed the suspicion of a congenital fistula between the left anterior descending coronary artery and the right ventricle.. At surgery the presence of a severely dilated and tortuous LAD was confirmed, without evidence of dissection.. Chest pain in patients with a coronary fistula can be caused by coronary steal, coronary dissection, or myocardial infarction.. Pre-operative stress MIBI-technetium imaging in this patient did not reveal any perfusion defects.. ...
The Cardiology Department provides a broad range of services in the diagnosis and management of heart diseases. The department consists of a strong team of doctors from various cardiac sub-specialties to treat all types of heart ailments. The department is fully equipped to do emergency Angioplasty which maximises the benefit for patients admitted with heart attacks.. The range of cardiac services includes Color Doppler Echocardiography, Tread Stress Test and Holter monitoring. Our Cath Lab has the most modern equipment to helps us carry out complex diagnostic and interventional procedures like Angioplasty and Catheter ablation with greater confidence in a more intuitive way.. ...
Frontier Lifeline Hospital, situated at Mogappair, in Chennai, India a 120 bed super specialty Cardiac Care unit promoted by internationally renowned Cardiac Surgeon Dr K M Cherian, with a motto SERVICE BEFORE SELF with certification by NABH & NABL, equipped with world class Infrastructure, and a team of highly dedicated and experienced Doctors, Physician Assistants, Nurses, Paramedical Staff and Research Scientists etc to provide quality healthcare in Cardio Thoracic and Vascular Disease with State-of-Art Technology,. Coronary Care Unit- A fully equipped Coronary Care Unit with sophisticated infusion pumps, dedicated ventilators, intra-aortic balloon pumps, besides colour doppler echocardiography, defibrillators and temporary pacemakers for handling all cardiac emergencies at any given time.. Intensive Care Unit - Separate state of the art Intensive Care Unit for Adult and Paediatric patients with a very high Nurse to Patient ratio assisted by competent Cardio Thoracic Surgeons, Anesthetist ...
Introduction. Assessing left ventricular (LV) systolic function in a rapid and reliable way can be challenging in the critically ill patient. The purpose of this study was to evaluate the feasibility and reliability of, as well as the association between, commonly used LV systolic parameters, by using serial transthoracic echocardiography (TTE).. Methods. Fifty patients with shock and mechanical ventilation were included. TTE examinations were performed daily for a total of 7 days. Methods used to assess LV systolic function were visually estimated, eyeball ejection fraction (EBEF), the Simpson single-plane method, mean atrioventricular plane displacement (AVPDm), septal tissue velocity imaging (TDIs), and velocity time integral in the left ventricular outflow tract (VTI).. Results. EBEF, AVPDm, TDIs, VTI, and the Simpson were obtained in 100%, 100%, 99%, 95% and 93%, respectively, of all possible examinations. The correlations between the Simpson and EBEF showed r values for all 7 days ...
Materials Science, Commodity Research and Production Certification. E. N. Borisova, N. N. Shapochka, Zh. Yu. Koytova The Research of Deformation and Strength Properties of Thread Joints Made on a Sheepskin. In article results of investigation of deformation properties of different thread joints on a sheepskin semiproduct obtained by the created test technique are presented. the possibility to choose product processing methods and forecast the stability of product sizes under the tension diagrams is showed. Key words: sheepskin semiproduct, thread joint, shuttle and chain stitches, tension diagram, strength, lengthening, rigidity modulus, relative compliance, dimensional stability. N. I. Brusko, I. V. Andreeva, A. M. Chelyshev, A. S. Krivobokova The Research of the Mechanical and Technological Properties of the Reinforced Sewing Threads. The quality of production under the conditions of the market economy is the determining factor of competitive ability and effective development of enterprise. ...
Genetically manipulated animals like mice or rabbits play an important role in the exploration of human cardiovascular diseases. It is therefore important to identify animal models that closely mimic physiological and pathological human cardiac function. In-vivo phase contrast cardiovascular magnetic resonance (CMR) was used to measure regional three-directional left ventricular myocardial motion with high temporal resolution in mice (N=18), rabbits (N=8), and humans (N=20). Radial, long-axis, and rotational myocardial velocities were acquired in left ventricular basal, mid-ventricular, and apical short-axis locations. Regional analysis revealed different patterns of motion: 1) In humans and rabbits, the apex showed slower radial velocities compared to the base. 2) Significant differences within species were seen in the pattern of long-axis motion. Long-axis velocities during systole were fairly homogeneously distributed in mice, whereas humans showed a dominant component in the lateral wall and rabbits
Aims The aims of the study were to explore the effects of long-term endurance exercise on atrial and ventricular size and function in adolescents and to examine whether these changes are related to maximal oxygen uptake (VO2max). Methods and results Twenty-seven long-term endurance-trained adolescents aged 13-19 years were individually matched by age and gender with 27 controls. All participants, 22 girls and 32 boys, underwent an echocardiographic examination at rest, including standard and colour tissue Doppler investigation. VO2max was assessed during treadmill exercise. All heart dimensions indexed for body size were larger in the physically active group compared with controls: left ventricular end-diastolic volume 60 vs. 50 mL/m(2) (P amp;lt; 0.001), left atrial volume 27 vs. 19 mL/m(2) (P amp;lt; 0.001), and right ventricular (RV) and right atrial area 15 vs. 13 and 9 vs. 7 cm(2)/m(2), respectively (P amp;lt; 0.001 for both). There were strong associations between the size of the cardiac ...
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How is short-axis views of two-dimensional echocardiograms abbreviated? SA-2DE stands for short-axis views of two-dimensional echocardiograms. SA-2DE is defined as short-axis views of two-dimensional echocardiograms rarely.
This study was performed to evaluate left ventricle (LV) function using pulsed tissue Doppler imaging (TDI) in healthy dogs and to determine the normal values of TDI parameters. Longitudinal myocardial motion at the septal mitral annulus was evaluate
The American Association for the Advancement of Science was told of the British developed tool x-CSI, which is described as low-dose, high-resolution, non-invasive and specific
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This second volume of PISA 2012 results defines and measures equity in education and analyses how equity in education has evolved across countries between PISA
Definition: This organism produces this material or substance, either during its life or after death. A produces B if some process that occurs in A has output B ...
Despite the UK not taking part, we are enthusiastic and supportive of the objectives of the financial education PISA tests - however....
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Rapinesi C, Kotzalidis GD, Scatena P, Del Casale A, Janiri D, Callovini G, Piacentino D, Serata D, Raccah RN, Brugnoli R, Digiacomantonio V, Mascioli F, Ferri VR, Ferracuti S, Pompili M, De Pisa E, Di Pietro S, Zangen A, Angeletti G & Girardi P ...
TY - JOUR. T1 - Quantification of flow volume with a new digital three-dimensional color Doppler flow approach. T2 - An in vitro study. AU - Li, J.. AU - Li, X.. AU - Mori, Y.. AU - Rusk, R. A.. AU - Lee, J. S.. AU - Davies, C. H.. AU - Hashimoto, I.. AU - El-Sedfy, G. O.M.. AU - Li, X. N.. AU - Sahn, D. J.. N1 - Copyright: Copyright 2017 Elsevier B.V., All rights reserved.. PY - 2001. Y1 - 2001. N2 - Objective. The quantification of flow stroke volume is important for evaluation of patients with cardiac dysfunction and cardiovascular disease. Three-dimensional digital color Doppler flow imaging allows the acquisition of flow data in an orientation approximately parallel to flow and analysis of the Doppler flow velocities perpendicular to flow (cross-sectional flow calculation). This in vitro study assessed the applicability of this method for quantifying cardiac output in a funnel-shaped tube model similar to mitral inflow or the left ventricular outflow tract. Methods. A new digital ...
TY - JOUR. T1 - Dynamic change in mitral regurgitant orifice area. T2 - comparison of color doppler echocardiographic and electromagnetic flowmeter-based methods in a chronic animal model. AU - Shiota, Takahiro. AU - Jones, Michael. AU - Teien, Dag E.. AU - Yamada, Izumi. AU - Passafini, Arnaldo. AU - Ge, Shuping. AU - Sahn, David J.. N1 - Funding Information: Doppler echocardiographie quantitative evaluation of valvular regurgitant lesions has been attempted using a number of methods, none of which has achieved general clinical utilization (1-5). Imaging of the proximo! flow convergence region in the left ventricle for flow accelerating retrograde across the mitral valve has been reported (6-8) to 4-useful for identifying the site of regurgitation and for grading its severity. The flow convergence phenomenon has been used experimentally and clinically for quantifying the regurgitant flow volume and flow rate using a variety of assumptions, most commonly that of a hemispheric isovelocity flow ...
Echocardiography is the method of choice to establish a diagnosis and determine a treatment plan for patients with noncompaction of ventricular myocardium (NVM). The 2-dimentional echocardiography, 3-dimentional echocardiography, color Doppler echocardiography and contrast-enhanced echocardiography are of critical importance for diagnosis and family screening of NVM.
China Sonoscape S20 Ultrasonic Diagnostic Equipment 4D, Pragnancy 4D Color Doppler Machine, Find details about China Ultrasonic Diagnostic Equipment 4D, Pragnancy 4D Machine from Sonoscape S20 Ultrasonic Diagnostic Equipment 4D, Pragnancy 4D Color Doppler Machine - Guangzhou Med Equipment Co., Ltd.
TY - JOUR. T1 - Automated quantification of mitral regurgitation by three dimensional real time full volume color doppler transthoracic echocardiography. T2 - A validation with cardiac magnetic resonance imaging and comparison with two dimensional quantitative methods. AU - Son, Jang Won. AU - Chang, Hyuk Jae. AU - Lee, Jin Kyung. AU - Chung, Hee Jung. AU - Song, Ran Young. AU - Kim, Young Jin. AU - Datta, Saurabh. AU - Heo, Ran. AU - Shin, Sang Hoon. AU - Cho, In Jeong. AU - Shim, Chi Young. AU - Hong, Geu Ru. AU - Chung, Namsik. PY - 2013. Y1 - 2013. N2 - Background: Accurate assessment of mitral regurgitation (MR) severity is crucial for clinical decision-making and optimizing patient outcomes. Recent advances in real-time three dimensional (3D) echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it practical to quantify MR by subtracting aortic stroke volume from the volume of mitral inflow in an automated manner. ...
In the early phase of embryogenesis, the heart consists of a loose network of muscle fibers that normally condense gradually, and it becomes compacted with the disappearance of large intertrabecular spaces. It is thought that ventricular noncompaction represents an arrest in this process. Sengupta et al.[5] demonstrated that the myocardium was essentially 2-layered in the areas of noncompaction, with the noncompacted endocardiumto-epicardium ratio of ≥2. They measured the thickness during end-systole for better visualization of LVNC.[5] In our case, the ratio of left ventricular noncompacted/ compacted myocardial layers was 4.2.. Ventricular noncompaction may occur in isolation (isolated ventricular noncompaction) or may be associated with other congenital cardiac malformations.[6],[7] Echocardiography, magnetic resonance imaging, and angiography are the main imaging tools to diagnose ventricular noncompaction, but two-dimensional color Doppler echocardiography is the standard and first-line ...
Pulmonary venous aneurysm is rare and its etiology is still debated. Some studies have shown that acquired aneurysms are caused by an increase in left atrial pressure and mitral regurgitation. However, few reports have provided direct evidence of this pathology. We present a case of pulmonary venous aneurysm diagnosed using a combination of echocardiography and contrast-enhanced computed tomography with strong evidence for an etiology of severe mitral valve regurgitation. A 24-year-old Chinese man was diagnosed with mitral valve perforation with severe mitral regurgitation caused by infectious endocarditis. A right inferior pulmonary venous aneurysm was diagnosed by contrast-enhanced computed tomography. Color Doppler echocardiography revealed a mitral regurgitation jet filling the giant aneurysm. Three-dimensional echocardiography provided a clear stereoscopic view of the aneurysm. These imaging modalities provided direct evidence for the etiology of the pulmonary venous aneurysm.
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Degenerative mitral stenosis (DMS) is characterized by decreased mitral valve (MV) orifice area and increased transmitral pressure gradient due to chronic noninflammatory degeneration and subsequent calcification of the fibrous mitral annulus and the MV leaflets. The true prevalence of DMS in the general population is unknown. DMS predominantly affects elderly individuals, many of whom have multiple other comorbidities. Transcatheter MV replacement techniques, although their long-term outcomes are yet to be tested, have been gaining popularity and may emerge as more effective and relatively safer treatment option for patients with DMS. Echocardiography is the primary imaging modality for evaluation of DMS and related hemodynamic abnormalities such as increased transmitral pressure gradient and pulmonary arterial pressure. Classic echocardiographic techniques used for evaluation of mitral stenosis (pressure half time, proximal isovelocity surface area, continuity equation, and MV area ...
This thesis deals with the estimation of blood flow in the heart and larger vessels where control-volume methods are applied using ultrasound Doppler technique. In particular two control-volume techniques were investigated: The proximal isovelocity surface area method, (PISA) and the Surface Integration of Velocity Vectors method, (SIVV).. For PISA, computational fluid dynamics, (CFD) was used for non-stationary flow and non-planar circular geometries where special emphasis was given to the influence from the angle of the valvular leaflets on the proximal surface area. The CFD results were compared with ultrasound measurements, in an in-vitro model with controlled geometry and flow characteristics. Three different valvular geometries were used: planar, reversed cone and funnel. In these idealised CFD and experimental models it was found that there is support to use the hemispherical PISA approach for the geometries investigated provided that the flow is not to high in the reversed cone and ...
The aim of the present study was to measure regional ventricular function at rest and during stress in order to assess if patients with Type II diabetes have subclinical myocardial dysfunction and if it is related to risk factors. Seventy subjects (35 patients with Type II diabetes with no symptoms, signs or history of heart disease, and 35 age- and sex-matched healthy controls) had echocardiography at rest and during dobutamine stress. Myocardial velocities were measured off-line from digital loops of colour tissue Doppler. Subendocardial function was assessed from the mean longitudinal velocities of four basal segments (apical views) and radial function from the velocities of the basal posterior wall (parasternal view). Systolic functional reserve was calculated as the increase in velocity from baseline. Longitudinal peak systolic velocity was lower in patients with diabetes, at rest (5.6±1.4 compared with 6.5±1.1 cm/s) and at peak stress (10.9±2.8 compared with 14.3±2.1 cm/s) (both ...
These results demonstrate that regional left ventricular contraction can be quantitatively assessed by the myocardial velocity gradient derived from two-dimensional tissue Doppler imaging. We suggest that myocardial velocity gradient has potential for the quantitative assessment of regional left ven …
0163]As described herein, mechanical mapping includes acquiring motion information, which may stem from cardiac motion, respiratory motion or other types of motion. With respect to cardiac mechanics, mechanical coordination between the RV and LV, and more importantly across regions of the LV, is a major determinant of overall pump function. Preoperative echocardiography, including Tissue Doppler Imaging (TDI) (see Ansalone G, Giannantoni P, Ricci R, et al.: Doppler myocardial imaging to evaluate the effectiveness of pacing sites in patients receiving biventricular pacing. J Am Coll Cardiol 2002; 39:489-499) and its derivatives like Tissue Tracking Imaging (TTI) (see Pan C, Hoffmann R, Kuhl H, et al.: Tissue tracking allows rapid and accurate visual evaluation of left ventricular function. Eur J Echocardiogr 2001; 2:197-202) and Tissue Synchronization Imaging (TSI) (see Murphy R T, Sigurdsson G, Mulamalla S, et al.: Tissue synchronization imaging and optimal left ventricular pacing site in ...
Doppler Echocardiography in Infancy and Childhood auf frohberg.de - This book covers the full range of Doppler echocardiography in infants and children,...
Liste de publication , ECHOCARDIOGRAPHIC DIAGNOSIS OF DISSECTING ANEURYSM OF THE ASCENDING AORTA BY M MODE AND BIDIMENSIONAL ECHOCARDIOGRAPHY ...
A theory and graphical presentation for the analysis of helix structure and deformations in oligonucleotides is presented. The parameters persistence and flexibility as defined in the configurational statistics of polymers of infinite length are reformulated at the oligonucleotide level in an extension of J. A. Schellmans method [(1974) Biopolymers, Vol. 17, pp. 217-226], and used as a basis for a systematic Persistence Analysis of the helix deformation properties for all possible subsequences in the structure. The basis for the analysis is a set of link vectors referenced to individual base pairs, and is limited to sequences exhibiting only perturbed rod-like behavior, i.e., below the threshold for supercoiling. The present application of the method is concerned with a physical model for the angular component of bending, so the link vectors are defined as the unit components of a global helix axis obtained by the procedure Curves of R. Lavery and H. Sklenar [(1988) J. Biomol. Struct. ...
ISO 1798 method determines the tensile and deformation properties of flexible cellular materials when extended at a constant rate of displacement until failure.
SVAV 0.785 x LVOT x VTIlvdt im pw, SVmv 0.785 x Dmv 2 x YWntbypin Regurgitation Severity by RV mL beat Moderate 30 -59 mL beat Severe gt 60 mL beat Moderate
Notice for Anesthesia Workstation from Rourkela Government Hospital, Rourkela (PDF 645 KB) Battery Operated transporting Vehicle(PDF 315 KB) Oxygen Manifold System(PDF 490 KB) HIGH PRESSURE LIQUID CHROMATOGRAPHY & AUTOMATED IMMUNOLOGY ANALYZER(PDF 2 MB) Ultrasound Machine (USG 3D-4D Colour Doppler)(PDF 1 MB) Public Address System(PDF 491 KB) Intercom Cum EPABX(PDF 454 KB) CCTV Camera(PDF 458 KB) […]
Battini L (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Lacaria E (University of Pisa, Department of Endocrinology and Metabolism, Pisa, Italy), Trojano G (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Bottone P (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Fulceri M A (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Carmignani A (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Cattani R (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Morini P (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Salerno M G (Department Obstretics-Gynaecology 2 Unit, University-Health Care System, Pisa, Italy), Del Prato S (University of Pisa, Department of Endocrinology and Metabolism, Pisa, Italy), Di Cianni G (Hospital of Livorno ASL6, ...
The equation you wrote is for the velocity, not the velocity gradient. What do you get if you differentiate your equation for u with respect to y ...
Correlation between aortic velocity time integral (AoVTI) at Adaptive CRT and echo-optimized device settings (AoVTI is an echocardiographic representative of stroke volume and cardiac performance ...
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Contact: Prof. Paolo Ferragina, Professore Ordinario di Algoritmi, Università di Pisa Scientific Committee: Paolo Ferragina, Università di Pisa; Fosca Giannotti, Consiglio Nazionale delle Ricerche di Pisa; Fabrizio Lillo, Scuola Normale Superiore di Pisa e Università di Bologna; Dino Pedreschi, Università di Pisa;
This 3D color map surface and bottom contour projection graph shows the emission of Ne IX ions from a very hot and dense plasma in a Z-pinch device ...
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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 ... Later, there are typically episodes of bluish color to the skin known as cyanosis. When affected babies cry or have a bowel ... Congenital heart defects are now diagnosed with echocardiography, which is quick, involves no radiation, is very specific, and ...
... 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 ...
Two-dimensional echocardiography with color-flow imaging and pulsed Doppler ultrasound was used to evaluate one fetus and five ... Color-flow imaging and pulsed Doppler ultrasonography provided anatomical and pathophysiological information regarding cardiac ... The vein of Galen can be visualized using ultrasound or Doppler. A malformed Great Cerebral Vein will be noticeably enlarged. ...
... echocardiography and color doppler. Oncology- the hospital's cancer centre provides medical and surgical treatment to patients ...
Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler 54 ... Circulation 1997;95:151-5 Color M-mode and Doppler-derived tau (τ) as practical advances in clinical diastology - the TauCoMM ... 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. ...
The first use in the United States of color doppler echocardiography for visualizing internal cardiac structures was introduced ...
Echocardiography Spiral Computed Tomography, Color Doppler and Ultrasonography Renal Transplantation and Renal Hemodialysis ...
Central 24Hr Pharmacy Computer Assisted Joint Transplantation C Arm X-ray Ultrasound Scan Echo Cardiography T M T Color Doppler ...
Tesla MRI Sleep lab with polysomnography Pain clinic Fibreoptic intubation scope TMT M mode 2D color Doppler Echocardiography ...
... doppler, color MeSH E01.370.350.850.850.850.850.220 - echocardiography, doppler, color MeSH E01.370.350.850.850.860 - ... echocardiography, doppler MeSH E01.370.350.850.220.220.220 - echocardiography, doppler, color MeSH E01.370.350.850.220.220.225 ... echocardiography, doppler MeSH E01.370.350.850.850.220.220 - echocardiography, doppler, color MeSH E01.370.350.850.850.220.225 ... echocardiography, doppler MeSH E01.370.370.380.220.220.220 - echocardiography, doppler, color MeSH E01.370.370.380.220.220.225 ...
... transthoracic or transesophageal echocardiography, color flow mapping, and Doppler imaging. Use of the various test can help to ... A color flow and doppler imaging is used to help confirm the presence as well as evaluate the severity of ASD and MS. A chest x ... Transthoracic or Transesophageal echocardiography two dimensional images that can be made of the heart. They can be used to ... change in skin color at site of initial catheterization in groin, or pain in the groin. If any of the above symptoms occur, it ...
An AI color jet width > 65 % of the left ventricular outflow tract diameter Doppler vena contracta width > 0.6 cm The pressure ... Part 1: aortic and pulmonary regurgitation (native valve disease)" (PDF). European Journal of Echocardiography. 11 (3): 223-244 ... "The Emerging Role of Exercise Testing and Stress Echocardiography in Valvular Heart Disease". Journal of the American College ... "European Association of Echocardiography recommendations for the assessment of valvular regurgitation. ...
Color Doppler or color flow Doppler is the presentation of the velocity by color scale. Color Doppler images are generally ... Doppler echocardiography is the use of Doppler ultrasonography to examine the heart. An echocardiogram can, within certain ... or as an image using color Doppler (directional Doppler) or power Doppler (non directional Doppler). This Doppler shift falls ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ...
Scalia, G.M.; Burstow, D.J. (1999). "Color M-mode and Doppler-derived tau (?) as practical advances in clinical diastology - ... Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler Oh ... Echocardiography uses ultrasound to create real-time anatomic images of the heart and its structures. Doppler echocardiography ... Echocardiography Textbook by Bonita Anderson Echocardiography (Ultrasound of the heart) Doppler Examination - Introduction The ...
Color doppler flow on the transthoracic echocardiogram (TTE) will reveal a jet of blood flowing from the left ventricle into ... Methods that have been used to assess the regurgitant fraction in mitral regurgitation include echocardiography, cardiac ... The quantification of MR usually employs imaging studies such as echocardiography or magnetic resonance angiography of the ...
CD = Color Flow Doppler. *CF = Cinefluorography (retired). *CP = Colposcopy. *CR = Computed Radiography ... EC = Echocardiography. *ES = Endoscopy. *FA = Fluorescein Angiography. *FS = Fundoscopy. *HC = Hard Copy ...
Color doppler can also show blood flow in abnormal locations such as with septal defects (ASD or VSD). Color doppler can also ... "Clinical utility of Doppler echocardiography and tissue Doppler imaging in the estimation of left ventricular filling pressures ... It can be used to watch the movement of structures with time Color doppler is a form of 2D echo in which the doppler shift of ... and aortic root sizes Color doppler of all four valves Spectral doppler of tricuspid and pulmonary valves This view is obtained ...
3] Two-dimensional parasternal and color Doppler images at the level of both ventricles that show the noncompacted:compacted ... Echocardiography is the reference standard for diagnosing NCC, although it can be well defined by computer tomography scan, ... 1] Transthoracic two-dimensional study with color and continuous wave Doppler shows left ventricular noncompaction associated ... "Identification of a rare congenital anomaly of the myocardium by two-dimensional echocardiography: persistence of isolated ...
Diagnosis is made by colour doppler echocardiography scanning by a specialist veterinarian. Disorders of the skin of a ... The usual black color of affected puppies will start to appear diluted and turn liverish, due to a zinc deficiency which ...
In transthoracic echocardiography, an atrial septal defect may be seen on color flow imaging as a jet of blood from the left ... 1995). "Transcranial doppler monitoring. (letter to editor)". South Pacific Underwater Medicine Society Journal. 25 (2). ISSN ... On echocardiography, shunting of blood may not be noted except when the patient coughs.[citation needed] PFO is linked to ... This may result in the clinical finding of cyanosis, the presence of bluish-colored skin, especially of the lips and under the ...
Vierendeels, J. A., E. Dick, and P. R. Verdonck, Hydrodynamics of color M-mode Doppler flow wave propagation velocity V(p): A ... 110 volunteers from 5 to 85 years old had their hearts imaged with transthoracic echocardiography without having any prior ... This phenomenon was initially observed in vitro and subsequently strengthened by analyses based on color Doppler mapping and ... This mechanism is commonly seen, for example, when a drop of colored liquid falls into a cup of water. It is also often seen at ...
The following tests are routinely done: Ultrasound / Color Doppler General Radiography Special Radiography Interventional ... The following diagnostic facilities are available: Transthoracic echocardiography Transoesophageal echocardiography Exercise ... The Institute also has facilities of Cardiac CT-scan, Nuclear Cardiology, Exercise Tolerance Testing and Echocardiography. The ...
... was made possible with the developments of Doppler and color Doppler. Doppler measurements using Doppler effect can show the ... As with heart ultrasound (echocardiography) studies, venous ultrasonography requires an understanding of hemodynamics in order ... Alongside the improving imaging technology, acoustic Doppler velocimetry and medical ultrasonography color Doppler were ... The overlay of color onto the Doppler information lets these images be seen more clearly. The choice of a probe will depend on ...
Color Doppler is the measurement of velocity by color scale. Color Doppler images are generally combined with gray scale (B- ... Uses include: Doppler echocardiography, the use of Doppler ultrasonography to examine the heart. An echocardiogram can, within ... Doppler mode: This mode makes use of the Doppler effect in measuring and visualizing blood flow Color Doppler: Velocity ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ...
EEG TMT X-ray CT Scan ECG PFT ECHO Mammogram Color Doppler Ultrasound Endoscopy Rates for Hospital Wards at Maharaja Agrasen ... "Echocardiography", Wikipedia, 27 August 2020, retrieved 16 September 2020 "Maharaja Agrasen Hospital in Bangalore". www.medifee ...
"Tricuspid and mitral regurgitation detected by color flow Doppler in the acute phase of Kawasaki disease". The American Journal ... Coronary arteritis may be present, but aneurysms are generally not yet visible by echocardiography. The subacute phase begins ... March 1981). "[Two-dimensional echocardiography of coronary artery in Kawasaki disease (MCLS): detection, changes in acute ... Echocardiography in Pediatric and Congenital Heart Disease: From Fetus to Adult (2 ed.). John Wiley & Sons. p. 739. ISBN ...
Their skin is the color that their fur would be, and all the usual cat markings (solid, point, van, tabby, tortie, etc.) may be ... 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 uses standard two-dimensional, three-dimensional, and Doppler ultrasound to create images of the heart. ... depending on whether the child has the potential to turn bluish in color. The problems may involve the interior walls of the ... 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 ...
... (TCD) and transcranial color Doppler (TCCD) are types of Doppler ultrasonography that measure the velocity ... 3 Implantable transcranial Doppler. *4 Functional transcranial Doppler (fTCD) *4.1 Functional transcranial Doppler spectroscopy ... Functional transcranial Doppler (fTCD)[edit]. Functional transcranial Doppler sonography (fTCD) is a neuroimaging tool for ... Njemanze, PC; Gomez, CR; Horenstein, S (1992). "Cerebral lateralization and color perception: A transcranial Doppler study". ...
Computer representation of false-color image of a cross section of human brain, based on scintillography in Positron-Emission ... Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Color Doppler is the measurement of velocity by color scale. Color Doppler images are generally combined with grayscale (B-mode ... Doppler echocardiography, the use of Doppler ultrasonography to examine the heart.[28] An echocardiogram can, within certain ... Doppler mode: This mode makes use of the Doppler effect in measuring and visualizing blood flow *Color Doppler: Velocity ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ...
The resulting brain activation can be graphically represented by color-coding the strength of activation across the brain or ... Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Computer representation of false-color image of a cross section of human brain, based on scintillography in Positron-Emission ... Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ...
Still, the epitomes of volume rendering models feature a mix of for example coloring[82] and shading[83] in order to create ... Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ... In volume rendering, transparency, colors and shading are used to allow a better representation of the volume to be shown in a ... Multiple models can be constructed from various thresholds, allowing different colors to represent each anatomical component ...
Their skin is the color that their fur would be, and all the usual cat markings (solid, point, van, tabby, tortie, etc.) may be ... 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 ... However, whereas the pointed pattern is entirely colorless everywhere else on the body, the mink coloration has some color ...
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 ... depending on whether the child has the potential to turn bluish in color.[86] The problems may involve the interior walls of ... 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 ...
displaystyle {\bar {D}}={\begin{vmatrix}D_{\color {red}xx}&D_{xy}&D_{xz}\\D_{xy}&D_{\color {red}yy}&D_{yz}\\D_{xz}&D_{yz}&D_{\ ... Echocardiography. *Doppler ultrasonography *Doppler echocardiography *TTE. *TEE. *Transcranial Doppler. *Intravascular. * ... This vector can be color-coded, yielding a cartography of the tracts' position and direction (red for left-right, blue for ... color {red}zz}\end{vmatrix}}}. The same matrix of numbers can have a simultaneous second use to describe the shape and ...
Diagnosis is made by colour doppler echocardiography scanning by a specialist veterinarian. ... The usual black color of affected puppies will start to appear diluted and turn liverish, due to a zinc deficiency which result ...
Color Doppler echocardiography provides a two-dimensional moving image of the heart. Near the upper left, the heart can be seen ... Color is used to show the direction and speed of blood flow through the atria and ventricles. ...
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 ... Color Doppler echocardiography , Article about color Doppler echocardiography by The Free Dictionary https://encyclopedia2. ...
Three-Dimensional Color Doppler Echocardiography for Direct Measurement of Vena Contracta Area in Mitral Regurgitation: In ... Three-Dimensional Color Doppler Echocardiography for Direct Measurement of Vena Contracta Area in Mitral Regurgitation ... Three-Dimensional Color Doppler Echocardiography for Direct Measurement of Vena Contracta Area in Mitral Regurgitation ... Three-Dimensional Color Doppler Echocardiography for Direct Measurement of Vena Contracta Area in Mitral Regurgitation ...
TCT-104 Initial Pre-clinical and Clinical Use of Mechanical Intracardiac Echocardiography System with 3D Viewing, Color Doppler ... TCT-104 Initial Pre-clinical and Clinical Use of Mechanical Intracardiac Echocardiography System with 3D Viewing, Color Doppler ... TCT-104 Initial Pre-clinical and Clinical Use of Mechanical Intracardiac Echocardiography System with 3D Viewing, Color Doppler ... and is capable of generating 2D side-viewing cross-sectional images and 3D volume renderings as well as 2D color doppler. The ...
EARLY FIRST TRIMESTER FETAL ECHOCARDIOGRAPHY: IDENTIFICATION OF CARDIAC STRUCTURES BY 2D IMAGING AND COLOR DOPPLER FROM SIX ... EARLY FIRST TRIMESTER FETAL ECHOCARDIOGRAPHY: IDENTIFICATION OF CARDIAC STRUCTURES BY 2D IMAGING AND COLOR DOPPLER FROM SIX ... EARLY FIRST TRIMESTER FETAL ECHOCARDIOGRAPHY: IDENTIFICATION OF CARDIAC STRUCTURES BY 2D IMAGING AND COLOR DOPPLER FROM SIX ... All had 2 dimensional cardiac imaging combined with color Doppler (CD) assessment. Transabdominal scanning was used in all ...
Doppler echography, duplex ultrasonography, Color-coded Doppler sonography, Echocardiography, Doppler (en); اکودوپلر (fa); ... Velocitometría doppler color, Ecodoppler, Velocitometria doppler color, Ecografia doppler (es) ... 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 ...
Two-dimensional (2D) echocardiogram with the aid of color Doppler and pulsed Doppler allows one to record blood flow waveforms ... The color Doppler filter was adjusted to lower pulse repetition frequency (b) and the pulsed Doppler sample located in the ... Normal Doppler waveforms of inferior vena cava Doppler obtained at sagittal view of superior and inferior vena cavas (a). ... Functional cardiac measurements performed by two-dimensional Doppler echocardiography in normal fetuses: Determination of Z- ...
H&H is an ISO certified healthcare service platform that ensures your best treatment by getting you in touch with top-quality medical experts and services. All our partner hospitals are NABL, NABH, JCI, ISO certified so that you never compromise on quality. ...
Get the best portable laptop Echocardiography color doppler ultrasound machine. Visit to multiple studies have demonstrated ... SIFULTRAS-6.2 Laptop Echocardiography Color Doppler Ultrasound Scanner. Color Doppler Ultrasound System is a very high cost- ... Color Doppler (CFM). -Power Doppler (PDI). -Directional Power Doppler (DPDI). -Pulsed Wave Doppler (PWD). -B+PWD (Duplex). -B+ ... Doppler frequency selection. -color frame averaging. -Transparent Color Mapping (TCM). 4. Pulsed Wave Doppler:. -PRF variable: ...
Two dimensional and Doppler echocardiography constitutes a safe, non-invasive, easily repeatable diagnostic examination that ... García-Fernandez MA (1989) Etxebeste Doppler Color en Cardiologia. Madrid: Mc Graw Hill Inter.Google Scholar ... 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 ...
Echocardiography with Color Doppler Package in India start from $44 Package includes admission charges, surgery, charges for ... Echocardiography with Color Doppler Package in India. Home > Echocardiography with Color Doppler Package in India ...
Routine use of intraoperative epicardial echocardiography and Doppler color flow imaging to guide and evaluate repair of ... Routine epicardial two-dimensional echocardiography, Doppler, and Doppler color flow imaging studies were performed before and ... Routine use of intraoperative epicardial echocardiography and Doppler color flow imaging to guide and evaluate repair of ... After bypass, echo-Doppler color flow imaging disclosed unsuspected residual defects in 22 patients (7%) who were doing well ...
The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic ... The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic ... The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic ... The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic ...
Echocardiography with Color Doppler treatment in India. within your budget. Contact Us at Vaidam for the right guidance ... Looking for the list of best Echocardiography with Color Doppler Hospital in India. ... Best Echocardiography With Color Doppler Hospitals in New Delhi. *Best Echocardiography With Color Doppler Hospitals in Mumbai ... Best Echocardiography With Color Doppler Hospitals in New Delhi. *Best Echocardiography With Color Doppler Hospitals in Mumbai ...
Find details about China High Class 4D Color Doppler, Ultrasound from Med-Du-S8exp Portable Echocardiography Color Doppler ... China Med-Du-S8exp Portable Echocardiography Color Doppler Ultrasound Machine, ... Med-Du-S8exp Portable Echocardiography Color Doppler Ultrasound Machine Med-Du-S8exp Portable Echocardiography Color Doppler ... Color Doppler Ultrasound manufacturer / supplier in China, offering Med-Du-S8exp Portable Echocardiography Color Doppler ...
Scalia, G.M.; Burstow, D.J. (1999). "Color M-mode and Doppler-derived tau (?) as practical advances in clinical diastology - ... Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler Oh ... Echocardiography uses ultrasound to create real-time anatomic images of the heart and its structures. Doppler echocardiography ... Echocardiography Textbook by Bonita Anderson Echocardiography (Ultrasound of the heart) Doppler Examination - Introduction The ...
... and color flow; abdominal aortography; contrast arteriography; magnetic resonance imaging (i.e., MRI); and echocardiography. ... These include: computed tomography; magnetic resonance angiography; computed angiography; sonography including Doppler, ...
... uses echocardiography to assess how well the heart works. During the procedure, a transducer (like a microphone) sends out ... Color Doppler. Color Doppler is an enhanced form of Doppler echocardiography. With color Doppler, different colors are used to ... Doppler echocardiography. This Doppler technique is used to assess blood flow through the hearts chambers and valves. The ... M-mode echocardiography. This is the simplest type of echocardiography. It makes an image that is similar to a tracing rather ...
To evaluate the performance of color and bidirectional power Doppler ultrasound combined with Fetal Intelligent Navigation ... Echocardiography (FINE) in examining the fetal heart.A prospective cohort stu... ...
Role of Preoperative Femoral Artery Color Doppler Echocardiography in Minimally Invasive Cardiac Surgery. Ceresa, Fabrizio; ... Role of Preoperative Femoral Artery Color Doppler Echocardiography in Minimally Invasive Cardiac Surgery. Ceresa, Fabrizio; ... Role of Preoperative Femoral Artery Color Doppler Echocardiography in Minimally Invasive Cardiac Surgery. Ceresa, Fabrizio; ...
Color Doppler. Color Doppler is an enhanced form of Doppler echocardiography. With color Doppler, different colors are used to ... and color Doppler) may be used. You will not be aware of the different techniques except that during the Doppler or color ... Doppler echocardiography. This Doppler technique is used to measure and assess the flow of blood through the hearts chambers ... M-mode echocardiography. This is the simplest type of echocardiography. It produces an image similar to a tracing rather than ...
... echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it ... echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it ... echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it ... echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it ...
... in vitro studies using color m-mode doppler echocardiography. Insufficient data describe the relationship of hemodynamic ... measured using color M-mode Doppler echocardiography. ...
Atlas Of Transesophageal Color Doppler Echocardiography And Intraoperative Imaging by Raffaele De Simone. , Hardcover , PDF, ... Atlas Of Transesophageal Color Doppler Echocardiography And Intraoperative Imaging Raffaele De Simone. ISBN: 9780387579382. ... This manual introduces the extraordinary diagnostic possibilities of Transesophageal Color Doppler Echocardiography and ... ofMoreThis manual introduces the extraordinary diagnostic possibilities of Transesophageal Color Doppler Echocardiography and ...
CONCLUSIONS: MVA assessment using PISA by single-beat real-time 3D color Doppler echocardiography is feasible in the clinical ... Proximal flow convergence method by three-dimensional color Doppler echocardiography for mitral valve area assessment in ... Direct measurement of proximal isovelocity surface area by single-beat three-dimensional color Doppler echocardiography in ... In vitro validation of real-time three-dimensional color Doppler echocardiography for direct measurement of proximal ...
Color Doppler M-mode echocardiography provides a spatiotemporal map of blood distribution (v(s,t)) within the heart, with a ... N2 - Color Doppler M-mode echocardiography provides a spatiotemporal map of blood distribution (v(s,t)) within the heart, with ... AB - Color Doppler M-mode echocardiography provides a spatiotemporal map of blood distribution (v(s,t)) within the heart, with ... abstract = "Color Doppler M-mode echocardiography provides a spatiotemporal map of blood distribution (v(s,t)) within the heart ...
Keywords: Aortic stiffness and distensibility, impaired glucose tolerance, tissue Doppler echocardiography. How to cite this ... In our study we aimed to evaluate the elastic properties of the aorta with conventional and color Doppler tissue imaging (CDTI ... Properties of Aorta in Patients with Impaired Glucose Tolerance by Conventional and Color-Doppler Tissue Echocardiography. Y. ... Properties of Aorta in Patients with Impaired Glucose Tolerance by Conventional and Color-Doppler Tissue Echocardiography. Turk ...
Methods: A total of 123 healthy patients (age range: 22 to 89 years) underwent echocardiography including color Doppler tissue ... Objective: Quantitative 2-dimensional color Doppler tissue imaging is a new method to reveal impairment of left ventricular (LV ... normal values of atrioventricular annular and myocardial velocities measured with quantitative two-dimensional color Doppler ...
We offer the newest technology for a full spectrum of imaging, Doppler, transesophageal, exercise, and dobutamine stress ... Our state-of-the-art echocardiography laboratory, accredited under strict IAC standards, is located in beautiful, patient- ... Doppler measurements may be displayed in black and white or in color. ... Doppler echocardiogram. This test is used to look at how blood flows through the heart chambers, heart valves, and blood ...
1. Quantifying aortic valve insufficiency using color Doppler echocardiography. Incorrect.Correct.. * Incorrect.Correct.. ...
  • This 1-hour Virtual Speaker-Led Training course is designed to provide customers the knowledge to recognize and analyze the anatomy and physiology of the normal and abnormal major venous structures seen during fetal echocardiography. (philips.com)
  • Normal and abnormal Doppler patterns encountered in performing a fetal echocardiogram will also be discussed. (philips.com)
  • In bergs series, about 58% were isolated cases, with the phenomenon is called limbus (on the same age group in which cases fetal echocardiography 93 the survival of 77. (au.edu)
  • As for the mitral valve (MV), intraoperative transesophageal echocardiography (TEE) is of paramount value to appreciate the feasibility of the repair. (annalscts.com)
  • This increase in caseload is due to significant improvement in survival of these patients and perhaps in part to the widespread use of perioperative transesophageal echocardiography (TEE). (psychiatryadvisor.com)
  • This course will review the comprehensive and systematic 2D, color Doppler, 3D, and 3D color Doppler TEE assessment of mitral valve structure and function. (philips.com)
  • Figure 1 Transesophageal echocardiographic midesophageal aortic valve long-axis (TEE ME AV LAX) view with color Doppler performed after aortic valve reimplantation surgery, showing mild aortic insufficiency (AI) immediately after release of the aortic cross-clamp. (annalscts.com)
  • This up to 2 hour Philips Clinical Education VILT course for noninvasive vascular diagnostic specialists is developed to meet the climbing need to standardize protocols and diagnostic approach for the performance of an arterial abdominal Doppler ultrasound examination and for the assessment of. (philips.com)
  • To evaluate the heart murmur and blood flow patterns, a color Doppler ultrasound will be performed. (faythclinic.com)
  • Dr. Manju Whig Singh is working as a Radiologist, Ultrasonologist, Vascular Ultrasound with Doppler Specialist In Greater Noida, and She holds experience of 24 years as a Radiologist. (3d4dultrasoundgreaternoida.com)
  • This Philips Clinical Education VILT course for noninvasive vascular diagnostic specialists is developed to meet the climbing need to standardize performance protocols and diagnostic criteria for Doppler assessment of the abdominal venous vasculature. (philips.com)
  • Echocardiography comprises a group of non-invasive techniques based on ultrasonic emission in the range of 2 to 10 MHz. (mapeisport.it)
  • The test comprises of Doppler as well as colour evaluation of the heart. (faythclinic.com)
  • They are well equipped with bedside color doppler, echocardiography system, continuous oxygen supply, infusion pumps, defibrillator, ventilators, invasive as well as non-invasive pressure monitoring systems, temporary pace maker (transdermal as well as transvenous), intra aortic balloon pump, ABG (Blood Gas machine) and electrolytes analysis machines. (nshospital.org)
  • This module teaches you how to how to set up and perform echocardiography assessment of endocarditis and pericarditis. (simtics.com)
  • We are just changing out a persons head from another design, using the outline and facial features from the new one we provided, but with the color scheme black with white highlights and coloration style of the original. (tcenter.co)
  • By echocardiography, the heart is shown in its entirety, this allowing to understand shapes and movement of the cardiac structures. (mapeisport.it)
  • This educational activity will review the importance of understanding the use of Doppler echocardiography to measure pressures within the heart noninvasively. (philips.com)
  • Post cardiopulmonary bypass intraoperative echocardiography evaluates the quality of the repair and has a predictive value on its durability ( 9 ). (annalscts.com)
  • You can also submit buying request for the abs sensor and specify your requirement on okchem.com, and we will help you find the quality 4d color doppler suppliers. (okchem.com)
  • 1. The Role of AI in Streamlining Echocardiography Quantification White Paper, Kristin McLeod - JB80498XX Final product configuration and features may differ from the ones represented here and may not be available in every country. (gevividultraedition.com)