Coronary Angiography: Radiography of the vascular system of the heart muscle after injection of a contrast medium.Coronary Vessels: The veins and arteries of the HEART.Coronary Artery Disease: Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.Angiography: Radiography of blood vessels after injection of a contrast medium.Coronary Stenosis: Narrowing or constriction of a coronary artery.Coronary Circulation: The circulation of blood through the CORONARY VESSELS of the HEART.Magnetic Resonance Angiography: Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.Angioplasty, Balloon, Coronary: Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.Coronary Disease: 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.Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Coronary Artery Bypass: Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.Angiography, Digital Subtraction: A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Myocardial Infarction: NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).Coronary Vasospasm: Spasm of the large- or medium-sized coronary arteries.Coronary Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of CORONARY VESSELS. Most coronary aneurysms are due to CORONARY ATHEROSCLEROSIS, and the rest are due to inflammatory diseases, such as KAWASAKI DISEASE.Sensitivity and Specificity: 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)Predictive Value of Tests: 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.Tomography, Spiral Computed: Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.Electrocardiography: 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.Contrast Media: Substances used to allow enhanced visualization of tissues.Prospective Studies: 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.Ultrasonography, Interventional: 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.Coronary Restenosis: Recurrent narrowing or constriction of a coronary artery following surgical procedures performed to alleviate a prior obstruction.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.Coronary Occlusion: Complete blockage of blood flow through one of the CORONARY ARTERIES, usually from CORONARY ATHEROSCLEROSIS.Coronary Thrombosis: Coagulation of blood in any of the CORONARY VESSELS. The presence of a blood clot (THROMBUS) often leads to MYOCARDIAL INFARCTION.Treatment Outcome: 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.Iopamidol: A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.Risk Factors: 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.Multidetector Computed Tomography: Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.Chest Pain: Pressure, burning, or numbness in the chest.Fluorescein Angiography: Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.Myocardial Revascularization: The restoration of blood supply to the myocardium. (From Dorland, 28th ed)Follow-Up Studies: 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.Percutaneous Coronary Intervention: A family of percutaneous techniques that are used to manage CORONARY OCCLUSION, including standard balloon angioplasty (PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY), the placement of intracoronary STENTS, and atheroablative technologies (e.g., ATHERECTOMY; ENDARTERECTOMY; THROMBECTOMY; PERCUTANEOUS TRANSLUMINAL LASER ANGIOPLASTY). PTCA was the dominant form of PCI, before the widespread use of stenting.Myocardial Perfusion Imaging: The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.Myocardial Ischemia: 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).Angina Pectoris: The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.Cardiac Catheterization: Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.Severity of Illness Index: Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.Exercise Test: 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.Tomography, Emission-Computed, Single-Photon: 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.Fractional Flow Reserve, Myocardial: The ratio of maximum blood flow to the MYOCARDIUM with CORONARY STENOSIS present, to the maximum equivalent blood flow without stenosis. The measurement is commonly used to verify borderline stenosis of CORONARY ARTERIES.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Retrospective Studies: 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.Calcinosis: Pathologic deposition of calcium salts in tissues.Radial Artery: The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand.Radiographic Image Interpretation, Computer-Assisted: Computer systems or networks designed to provide radiographic interpretive information.Angina, Unstable: Precordial pain at rest, which may precede a MYOCARDIAL INFARCTION.Coronary Vessel Anomalies: Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.Iohexol: An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.Echocardiography: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Reproducibility of Results: 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.Cineangiography: Motion pictures of the passage of contrast medium through blood vessels.Dipyridamole: 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)Collateral Circulation: Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.Triiodobenzoic Acids: Triiodo-substituted derivatives of BENZOIC ACID.Vasodilator Agents: Drugs used to cause dilation of the blood vessels.Observer Variation: 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).Risk Assessment: 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)Thallium Radioisotopes: Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes.Radionuclide Angiography: The measurement of visualization by radiation of any organ after a radionuclide has been injected into its blood supply. It is used to diagnose heart, liver, lung, and other diseases and to measure the function of those organs, except renography, for which RADIOISOTOPE RENOGRAPHY is available.Myocardial Bridging: A malformation that is characterized by a muscle bridge over a segment of the CORONARY ARTERIES. Systolic contractions of the muscle bridge can lead to narrowing of coronary artery; coronary compression; MYOCARDIAL ISCHEMIA; MYOCARDIAL INFARCTION; and SUDDEN CARDIAC DEATH.Imaging, Three-Dimensional: 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.Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.Angiocardiography: Radiography of the heart and great vessels after injection of a contrast medium.Coronary Care Units: The hospital unit in which patients with acute cardiac disorders receive intensive care.Image Processing, Computer-Assisted: 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.Echocardiography, Stress: A method of recording heart motion and internal structures by combining ultrasonic imaging with exercise testing (EXERCISE TEST) or pharmacologic stress.Prognosis: 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.Angina, Stable: Persistent and reproducible chest discomfort usually precipitated by a physical exertion that dissipates upon cessation of such an activity. The symptoms are manifestations of MYOCARDIAL ISCHEMIA.Dobutamine: 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.Constriction, Pathologic: The condition of an anatomical structure's being constricted beyond normal dimensions.Radiation Dosage: The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).Technetium Tc 99m Sestamibi: A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.Platelet Aggregation Inhibitors: Drugs or agents which antagonize or impair any mechanism leading to blood platelet aggregation, whether during the phases of activation and shape change or following the dense-granule release reaction and stimulation of the prostaglandin-thromboxane system.Ergonovine: An ergot alkaloid (ERGOT ALKALOIDS) with uterine and VASCULAR SMOOTH MUSCLE contractile properties.Hemodynamics: The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.Biological Markers: Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.Graft Occlusion, Vascular: Obstruction of flow in biological or prosthetic vascular grafts.Cardiac-Gated Imaging Techniques: Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.Recurrence: The return of a sign, symptom, or disease after a remission.Heart: The hollow, muscular organ that maintains the circulation of the blood.Intracranial Aneurysm: Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.ROC Curve: 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.Cardiovascular Agents: Agents that affect the rate or intensity of cardiac contraction, blood vessel diameter, or blood volume.Adenosine: A nucleoside that is composed of ADENINE and D-RIBOSE. Adenosine or adenosine derivatives play many important biological roles in addition to being components of DNA and RNA. Adenosine itself is a neurotransmitter.Angina Pectoris, Variant: A clinical syndrome characterized by the development of CHEST PAIN at rest with concomitant transient ST segment elevation in the ELECTROCARDIOGRAM, but with preserved exercise capacity.Chi-Square Distribution: 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.Mucocutaneous Lymph Node Syndrome: An acute, febrile, mucocutaneous condition accompanied by swelling of cervical lymph nodes in infants and young children. The principal symptoms are fever, congestion of the ocular conjunctivae, reddening of the lips and oral cavity, protuberance of tongue papillae, and edema or erythema of the extremities.Nitroglycerin: A volatile vasodilator which relieves ANGINA PECTORIS by stimulating GUANYLATE CYCLASE and lowering cytosolic calcium. It is also sometimes used for TOCOLYSIS and explosives.Ioxaglic Acid: A low-osmolar, ionic contrast medium used in various radiographic procedures.Ventricular Function, Left: 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.Takotsubo Cardiomyopathy: A transient left ventricular apical dysfunction or ballooning accompanied by electrocardiographic (ECG) T wave inversions. This abnormality is associated with high levels of CATECHOLAMINES, either administered or endogenously secreted from a tumor or during extreme stress.Cardiology: The study of the heart, its physiology, and its functions.Acute Coronary Syndrome: An episode of MYOCARDIAL ISCHEMIA that generally lasts longer than a transient anginal episode that ultimately may lead to MYOCARDIAL INFARCTION.Plaque, Atherosclerotic: Lesions formed within the walls of ARTERIES.Thrombolytic Therapy: Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.Arterio-Arterial Fistula: Abnormal communication between two ARTERIES that may result from injury or occur as a congenital abnormality.Radiographic Image Enhancement: Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.Myocardial Reperfusion: Generally, restoration of blood supply to heart tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. Reperfusion can be induced to treat ischemia. Methods include chemical dissolution of an occluding thrombus, administration of vasodilator drugs, angioplasty, catheterization, and artery bypass graft surgery. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing MYOCARDIAL REPERFUSION INJURY.Cohort Studies: Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.Sinus of Valsalva: The dilatation of the aortic wall behind each of the cusps of the aortic valve.Multivariate Analysis: A set of techniques used when variation in several variables has to be studied simultaneously. In statistics, multivariate analysis is interpreted as any analytic method that allows simultaneous study of two or more dependent variables.Vasodilation: The physiological widening of BLOOD VESSELS by relaxing the underlying VASCULAR SMOOTH MUSCLE.Coronary Artery Bypass, Off-Pump: Coronary artery bypass surgery on a beating HEART without a CARDIOPULMONARY BYPASS (diverting the flow of blood from the heart and lungs through an oxygenator).Vascular Calcification: Deposition of calcium into the blood vessel structures. Excessive calcification of the vessels are associated with ATHEROSCLEROTIC PLAQUES formation particularly after MYOCARDIAL INFARCTION (see MONCKEBERG MEDIAL CALCIFIC SCLEROSIS) and chronic kidney diseases which in turn increase VASCULAR STIFFNESS.Logistic Models: Statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable. A common application is in epidemiology for estimating an individual's risk (probability of a disease) as a function of a given risk factor.Acute Disease: Disease having a short and relatively severe course.Arterial Occlusive Diseases: Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.Dogs: 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)Angioscopy: Endoscopic examination, therapy or surgery performed on the interior of blood vessels.Embolization, Therapeutic: A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.Patient Selection: Criteria and standards used for the determination of the appropriateness of the inclusion of patients with specific conditions in proposed treatment plans and the criteria used for the inclusion of subjects in various clinical trials and other research protocols.Artifacts: Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.Diabetic Angiopathies: VASCULAR DISEASES that are associated with DIABETES MELLITUS.Arteriovenous Fistula: An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE.Gadolinium DTPA: A complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid (DTPA see PENTETIC ACID), that is given to enhance the image in cranial and spinal MRIs. (From Martindale, The Extra Pharmacopoeia, 30th ed, p706)Myocardium: 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.Preoperative Care: Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Injections, Intra-Arterial: Delivery of drugs into an artery.Magnetic Resonance Imaging: 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.Cardiology Service, Hospital: The hospital department responsible for the administration and provision of diagnostic and therapeutic services for the cardiac patient.Stroke Volume: 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.Postoperative Complications: Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.Catheters: A flexible, tubular device that is used to carry fluids into or from a blood vessel, hollow organ, or body cavity.Syndrome: A characteristic symptom complex.Heart Ventricles: 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.Heart Diseases: Pathological conditions involving the HEART including its structural and functional abnormalities.Intracranial Arteriovenous Malformations: Congenital vascular anomalies in the brain characterized by direct communication between an artery and a vein without passing through the CAPILLARIES. The locations and size of the shunts determine the symptoms including HEADACHES; SEIZURES; STROKE; INTRACRANIAL HEMORRHAGES; mass effect; and vascular steal effect.Endothelium, Vascular: Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components.Arteries: The vessels carrying blood away from the heart.Fibrinolytic Agents: Fibrinolysin or agents that convert plasminogen to FIBRINOLYSIN.Dilatation, Pathologic: The condition of an anatomical structure's being dilated beyond normal dimensions.Heart Transplantation: The transference of a heart from one human or animal to another.Mammary Arteries: Arteries originating from the subclavian or axillary arteries and distributing to the anterior thoracic wall, mediastinal structures, diaphragm, pectoral muscles and mammary gland.Blood Pressure: PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.Unnecessary Procedures: Diagnostic, therapeutic, and investigative procedures prescribed and performed by health professionals, the results of which do not justify the benefits or hazards and costs to the patient.Incidence: The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.Swine: Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).Ticlopidine: An effective inhibitor of platelet aggregation commonly used in the placement of STENTS in CORONARY ARTERIES.Registries: The systems and processes involved in the establishment, support, management, and operation of registers, e.g., disease registers.Carotid Artery, Internal: Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.Aortography: Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.Microcirculation: The circulation of the BLOOD through the MICROVASCULAR NETWORK.Aspirin: The prototypical analgesic used in the treatment of mild to moderate pain. It has anti-inflammatory and antipyretic properties and acts as an inhibitor of cyclooxygenase which results in the inhibition of the biosynthesis of prostaglandins. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis. (From Martindale, The Extra Pharmacopoeia, 30th ed, p5)Aneurysm, Dissecting: Aneurysm caused by a tear in the TUNICA INTIMA of a blood vessel leading to interstitial HEMORRHAGE, and splitting (dissecting) of the vessel wall, often involving the AORTA. Dissection between the intima and media causes luminal occlusion. Dissection at the media, or between the media and the outer adventitia causes aneurismal dilation.Ulnar Artery: The larger of the two terminal branches of the brachial artery, beginning about one centimeter distal to the bend of the elbow. Like the RADIAL ARTERY, its branches may be divided into three groups corresponding to their locations in the forearm, wrist, and hand.Regression Analysis: 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.Microvascular Angina: ANGINA PECTORIS or angina-like chest pain with a normal coronary arteriogram and positive EXERCISE TEST. The cause of the syndrome is unknown. While its recognition is of clinical importance, its prognosis is excellent. (Braunwald, Heart Disease, 4th ed, p1346; Jablonski Dictionary of Syndromes & Eponymic Diseases, 2d ed). It is different from METABOLIC SYNDROME X, a syndrome characterized by INSULIN RESISTANCE and HYPERINSULINEMIA, that has increased risk for cardiovascular disease.Carotid Stenosis: Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)Ventricular Dysfunction, Left: 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.Sex Factors: Maleness or femaleness as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or effect of a circumstance. It is used with human or animal concepts but should be differentiated from SEX CHARACTERISTICS, anatomical or physiological manifestations of sex, and from SEX DISTRIBUTION, the number of males and females in given circumstances.Sirolimus: A macrolide compound obtained from Streptomyces hygroscopicus that acts by selectively blocking the transcriptional activation of cytokines thereby inhibiting cytokine production. It is bioactive only when bound to IMMUNOPHILINS. Sirolimus is a potent immunosuppressant and possesses both antifungal and antineoplastic properties.Case-Control Studies: 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.Equipment Design: Methods of creating machines and devices.Isosorbide Dinitrate: A vasodilator used in the treatment of ANGINA PECTORIS. Its actions are similar to NITROGLYCERIN but with a slower onset of action.Fistula: Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body.Diatrizoate: A commonly used x-ray contrast medium. As DIATRIZOATE MEGLUMINE and as Diatrizoate sodium, it is used for gastrointestinal studies, angiography, and urography.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Saphenous Vein: The vein which drains the foot and leg.Carotid Arteries: Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.Angioplasty, Balloon: Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.Carotid Artery Diseases: Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.Image Enhancement: 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.Echocardiography, Doppler: 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.Cardiac Imaging Techniques: Visualization of the heart structure and cardiac blood flow for diagnostic evaluation or to guide cardiac procedures via techniques including ENDOSCOPY (cardiac endoscopy, sometimes refered to as cardioscopy), RADIONUCLIDE IMAGING; MAGNETIC RESONANCE IMAGING; TOMOGRAPHY; or ULTRASONOGRAPHY.C-Reactive Protein: A plasma protein that circulates in increased amounts during inflammation and after tissue damage.Vascular Fistula: An abnormal passage between two or more BLOOD VESSELS, between ARTERIES; VEINS; or between an artery and a vein.Age Factors: Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.Internal Mammary-Coronary Artery Anastomosis: Direct myocardial revascularization in which the internal mammary artery is anastomosed to the right coronary artery, circumflex artery, or anterior descending coronary artery. The internal mammary artery is the most frequent choice, especially for a single graft, for coronary artery bypass surgery.Magnetic Resonance Imaging, Cine: 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.Hyperemia: The presence of an increased amount of blood in a body part or an organ leading to congestion or engorgement of blood vessels. Hyperemia can be due to increase of blood flow into the area (active or arterial), or due to obstruction of outflow of blood from the area (passive or venous).Angioplasty, Balloon, Laser-Assisted: Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1, laser fiber delivering the energy while the inflated balloon centers the fiber and occludes the blood flow; 2, balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that contain an internal fiber.Radiography, Interventional: Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.Myocardial Contraction: Contractile activity of the MYOCARDIUM.Radiopharmaceuticals: Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)Organotechnetium Compounds: Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.Vertebral Artery: The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.Gated Blood-Pool Imaging: Radionuclide ventriculography where scintigraphic data is acquired during repeated cardiac cycles at specific times in the cycle, using an electrocardiographic synchronizer or gating device. Analysis of right ventricular function is difficult with this technique; that is best evaluated by first-pass ventriculography (VENTRICULOGRAPHY, FIRST-PASS).Asymptomatic Diseases: Diseases that do not exhibit symptoms.Cardiotonic Agents: 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).Proportional Hazards Models: Statistical models used in survival analysis that assert that the effect of the study factors on the hazard rate in the study population is multiplicative and does not change over time.Prevalence: The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.Thrombosis: Formation and development of a thrombus or blood clot in the blood vessel.Drug-Eluting Stents: Stents that are covered with materials that are embedded with chemicals that are gradually released into the surrounding milieu.Cineradiography: Motion picture study of successive images appearing on a fluoroscopic screen.Single-Blind Method: A method in which either the observer(s) or the subject(s) is kept ignorant of the group to which the subjects are assigned.Diabetes Complications: Conditions or pathological processes associated with the disease of diabetes mellitus. Due to the impaired control of BLOOD GLUCOSE level in diabetic patients, pathological processes develop in numerous tissues and organs including the EYE, the KIDNEY, the BLOOD VESSELS, and the NERVE TISSUE.Echocardiography, Transesophageal: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.Aneurysm, Ruptured: The tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. The great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing HEMORRHAGIC SHOCK.Vasomotor System: The neural systems which act on VASCULAR SMOOTH MUSCLE to control blood vessel diameter. The major neural control is through the sympathetic nervous system.Streptokinase: Streptococcal fibrinolysin . An enzyme produced by hemolytic streptococci. It hydrolyzes amide linkages and serves as an activator of plasminogen. It is used in thrombolytic therapy and is used also in mixtures with streptodornase (STREPTODORNASE AND STREPTOKINASE). EC 3.4.-.Hypertension: Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.JapanInferior Wall Myocardial Infarction: MYOCARDIAL INFARCTION in which the inferior wall of the heart is involved. It is often caused by occlusion of the right coronary artery.

Geographic, demographic, and socioeconomic variations in the investigation and management of coronary heart disease in Scotland. (1/8209)

OBJECTIVE: To determine whether age, sex, level of deprivation, and area of residence affect the likelihood of investigation and treatment of patients with coronary heart disease. DESIGN, PATIENTS, AND INTERVENTIONS: Routine discharge data were used to identify patients admitted with acute myocardial infarction (AMI) between 1991 and 1993 inclusive. Record linkage provided the proportion undergoing angiography, percutaneous transluminal coronary angioplasty (PTCA), and coronary artery bypass grafting (CABG) over the following two years. Multiple logistic regression analysis was used to determine whether age, sex, deprivation, and area of residence were independently associated with progression to investigation and revascularisation. SETTING: Mainland Scotland 1991 to 1995 inclusive. MAIN OUTCOME MEASURES: Two year incidence of angiography, PTCA, and CABG. Results-36 838 patients were admitted with AMI. 4831 (13%) underwent angiography, 587 (2%) PTCA, and 1825 (5%) CABG. Women were significantly less likely to undergo angiography (p < 0.001) and CABG (p < 0.001) but more likely to undergo PTCA (p < 0.05). Older patients were less likely to undergo all three procedures (p < 0.001). Socioeconomic deprivation was associated with a reduced likelihood of both angiography and CABG (p < 0.001). There were significant geographic variations in all three modalities (p < 0.001). CONCLUSION: Variations in investigation and management were demonstrated by age, sex, geography, and socioeconomic deprivation. These are unlikely to be accounted for by differences in need; differences in clinical practice are, therefore, likely.  (+info)

Chronic radiodermatitis following cardiac catheterisation: a report of two cases and a brief review of the literature. (2/8209)

Cardiac angiography produces one of the highest radiation exposures of any commonly used diagnostic x ray procedure. Recently, serious radiation induced skin injuries have been reported after repeated therapeutic interventional procedures using prolonged fluoroscopic imaging. Two male patients, aged 62 and 71 years, in whom chronic radiodermatitis developed one to two years after two consecutive cardiac catheterisation procedures are reported. Both patients had undergone lengthy procedures using prolonged fluoroscopic guidance in a limited number of projections. The resulting skin lesions were preceded, in one case, by an acute erythema and took the form of a delayed pigmented telangiectatic, indurated, or ulcerated plaque in the upper back or below the axilla whose site corresponded to the location of the x ray tube during cardiac catheterisation. Cutaneous side effects of radiation exposure result from direct damage to the irradiated tissue and have known thresholds. The diagnosis of radiation induced skin injury relies essentially on clinical and histopathological findings, location of skin lesions, and careful medical history. Interventional cardiologists should be aware of this complication, because chronic radiodermatitis may result in painful and resistant ulceration and eventually in squamous cell carcinoma.  (+info)

Recurring myocardial infarction in a 35 year old woman. (3/8209)

A 35 year old woman presented with acute myocardial infarction without any of the usual risk factors: she had never smoked; she had normal blood pressure; she did not have diabetes; plasma concentrations of total cholesterol and high and low density lipoprotein cholesterol, fibrinogen, homocysteine, and Lp(a) lipoprotein were normal. She was not taking oral contraceptives or any other medication. Coronary angiography showed occlusion of the left anterior descending coronary artery but no evidence of arteriosclerosis. Medical history disclosed a previous leg vein thrombosis with pulmonary embolism. Coagulation analysis revealed protein C deficiency. The recognition of protein C deficiency as a risk factor for myocardial infarction is important as anticoagulation prevents further thrombotic events, whereas inhibitors of platelet aggregation are ineffective.  (+info)

One-year survival among patients with acute myocardial infarction complicated by cardiogenic shock, and its relation to early revascularization: results from the GUSTO-I trial. (4/8209)

BACKGROUND: Although 30-day survival is increased in patients with acute myocardial infarction complicated by cardiogenic shock who undergo coronary revascularization, the longer-term outcome in such patients and the duration of benefit from revascularization are unknown. METHODS AND RESULTS: We analyzed 30-day survivors of acute myocardial infarction in the Global Utilization of Streptokinase and Tissue-Plasminogen Activator for Occluded Coronary Arteries (GUSTO-I) trial and identified 36 333 who had not had cardiogenic shock (systolic blood pressure <90 mm Hg for >/=1 hour, group 1) and 1321 patients who had shock (group 2). Group 2 patients were older and sicker. At 1 year, 97.4% of group 1 patients were alive versus 88.0% of group 2 (P=0.0001). Among group 2 patients, 578 (44%) had undergone revascularization within 30 days (group 2A) and 728 (56%) had not (group 2B). Revascularization was not required by protocol but was selected by the attending physicians. At 1 year, 91.7% of group 2A patients were alive versus 85.3% of group 2B (P=0.0003). With the use of multivariable logistic regression analysis to adjust for differences in baseline characteristics of shock patients alive at 30 days, revascularization within 30 days was independently associated with reduced 1-year mortality (odds ratio 0.6, [95% confidence interval 0.4, 0.9], P=0.007). CONCLUSIONS: Most patients (88%) with acute myocardial infarction complicated by cardiogenic shock who are alive at 30 days survived at least 1 year. Shock patients who underwent revascularization within 30 days had improved survival at 1 year compared with shock patients who did not receive revascularization, even after adjustment for differences in baseline characteristics between the 2 groups.  (+info)

Usefulness of fractional flow reserve to predict clinical outcome after balloon angioplasty. (5/8209)

BACKGROUND: After regular coronary balloon angioplasty, it would be helpful to identify those patients who have a low cardiac event rate. Coronary angiography alone is not sensitive enough for that purpose, but it has been suggested that the combination of optimal angiographic and optimal functional results indicates a low restenosis chance. Pressure-derived myocardial fractional flow reserve (FFR) is an index of the functional severity of the residual epicardial lesion and could be useful for that purpose. METHODS AND RESULTS: In 60 consecutive patients with single-vessel disease, balloon angioplasty was performed by use of a pressure instead of a regular guide wire. Both quantitative coronary angiography (QCA) and measurement of FFR were performed 15 minutes after the procedure. A successful angioplasty result, defined as a residual diameter stenosis (DS) <50%, was achieved in 58 patients. In these patients, DS and FFR, measured 15 minutes after PTCA, were analyzed in relation to clinical outcome. In those 26 patients with both optimal angiographic (residual DS by QCA /=0.90) results, event-free survival rates at 6, 12, and 24 months were 92+/-5%, 92+/-5%, and 88+/-6%, respectively, versus 72+/-8%, 69+/-8%, and 59+/-9%, respectively, in the remaining 32 patients in whom the angiographic or functional result or both were suboptimal (P=0.047, P=0.028, and P=0.014, respectively). CONCLUSIONS: In patients with a residual DS /=0.90, clinical outcome up to 2 years is excellent. Therefore, there is a complementary value of coronary angiography and coronary pressure measurement in the evaluation of PTCA result.  (+info)

New-onset sustained ventricular tachycardia after cardiac surgery. (6/8209)

BACKGROUND: The de novo occurrence of sustained ventricular tachycardia (VT) after CABG has been described, but the incidence, mortality rate, long-term follow-up, and mechanism are not well defined. METHODS AND RESULTS: This prospective study enrolled consecutive patients undergoing CABG at a single institution. Patients were followed up for the development of sustained VT, and a detailed analysis of clinical, angiographic, and surgical variables associated with the occurrence of VT was performed. A total of 382 patients participated, and 12 patients (3.1%) experienced >/=1 episode of sustained VT 4.1+/-4.8 days after CABG. In 11 of 12 patients, no postoperative complication explained the VT; 1 patient had a perioperative myocardial infarction. The in-hospital mortality rate was 25%. Patients with VT were more likely to have prior myocardial infarction (92% versus 50%, P<0.01), severe congestive heart failure (56% versus 21%, P<0.01), and ejection fraction <0.40 (70% versus 29%, P<0.01). When all 3 factors were present, the risk of VT was 30%, a 14-fold increase. Patients with VT had more noncollateralized totally occluded vessels on angiogram (1.4+/-0.97 versus 0.54+/-0.7, P<0.01), a bypass graft across a noncollateralized occluded vessel (1.50+/-1.0 versus 0.42+/-0.62, P<0.01), and a bypass graft across a noncollateralized occluded vessel to an infarct zone (1.50+/-1.0 versus 0.17+/-0.38, P<0.01). By multivariate analysis, the number of bypass grafts across a noncollateralized occluded vessel to an infarct zone was the only independent factor predicting VT. CONCLUSIONS: The first presentation of sustained monomorphic VT in the recovery period after CABG is uncommon, but the incidence is high in specific clinical subsets. Placement of a bypass graft across a noncollateralized total occlusion in a vessel supplying an infarct zone was strongly and independently associated with the development of VT.  (+info)

Comparison of quantitative coronary angiography, intravascular ultrasound, and coronary pressure measurement to assess optimum stent deployment. (7/8209)

BACKGROUND: Although intravascular ultrasound (IVUS) is the present standard for the evaluation of optimum stent deployment, this technique is expensive and not routinely feasible in most catheterization laboratories. Coronary pressure-derived myocardial fractional flow reserve (FFRmyo) is an easy, cheap, and rapidly obtainable index that is specific for the conductance of the epicardial coronary artery. In this study, we investigated the usefulness of coronary pressure measurement to predict optimum and suboptimum stent deployment. METHODS AND RESULTS: In 30 patients, a Wiktor-i stent was implanted at different inflation pressures, starting at 6 atm and increasing step by step to 8, 10, 12, and 14 atm, if necessary. After every step, stent deployment was evaluated by quantitative coronary angiography (QCA), IVUS, and coronary pressure measurement. If any of the 3 techniques did not yield an optimum result, the next inflation was performed, and all 3 investigational modalities were repeated until optimum stent deployment was present by all of them or until the treating physician decided to accept the result. Optimum deployment according to QCA was finally achieved in 24 patients, according to IVUS in 17 patients, and also according to coronary pressure measurement in 17 patients. During the step-up, a total of 81 paired IVUS and coronary pressure measurements were performed, of which 91% yielded concordant results (ie, either an optimum or a suboptimum expansion of the stent by both techniques, P<0.00001). On the contrary, QCA showed a low concordance rate with IVUS and FFRmyo (48% and 46%, respectively). CONCLUSIONS: In this study, using a coil stent, both IVUS and coronary pressure measurement were of similar value with respect to the assessment of optimum stent deployment. Therefore, coronary pressure measurement can be used as a cheap and rapid alternative to IVUS for that purpose.  (+info)

A randomized placebo-controlled trial of fluvastatin for prevention of restenosis after successful coronary balloon angioplasty; final results of the fluvastatin angiographic restenosis (FLARE) trial. (8/8209)

BACKGROUND: The 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase inhibitors competitively inhibit biosynthesis of mevalonate, a precursor of non-sterol compounds involved in cell proliferation. Experimental evidence suggests that fluvastatin may, independent of any lipid lowering action, exert a greater direct inhibitory effect on proliferating vascular myocytes than other statins. The FLARE (Fluvastatin Angioplasty Restenosis) Trial was conceived to evaluate the ability of fluvastatin 40 mg twice daily to reduce restenosis after successful coronary balloon angioplasty (PTCA). METHODS: Patients were randomized to either placebo or fluvastatin 40 mg twice daily beginning 2-4 weeks prior to planned PTCA and continuing after a successful PTCA (without the use of a stent), to follow-up angiography at 26+/-2 weeks. Clinical follow-up was completed at 40 weeks. The primary end-point was angiographic restenosis, measured by quantitative coronary angiography at a core laboratory, as the loss in minimal luminal diameter during follow-up. Clinical end-points were death, myocardial infarction, coronary artery bypass graft surgery or re-intervention, up to 40 weeks after PTCA. RESULTS: Of 1054 patients randomized, 526 were allocated to fluvastatin and 528 to placebo. Among these, 409 in the fluvastatin group and 427 in the placebo group were included in the intention-to-treat analysis, having undergone a successful PTCA after a minimum of 2 weeks of pre-treatment. At the time of PTCA, fluvastatin had reduced LDL cholesterol by 37% and this was maintained at 33% at 26 weeks. There was no difference in the primary end-point between the treatment groups (fluvastatin 0.23+/-0.49 mm vs placebo 0.23+/-0.52 mm, P=0.95) or in the angiographic restenosis rate (fluvastatin 28%, placebo 31%, chi-square P=0.42), or in the incidence of the composite clinical end-point at 40 weeks (22.4% vs 23.3%; logrank P=0.74). However, a significantly lower incidence of total death and myocardial infarction was observed in six patients (1.4%) in the fluvastatin group and 17 (4.0%) in the placebo group (log rank P=0.025). CONCLUSION: Treatment with fluvastatin 80 mg daily did not affect the process of restenosis and is therefore not indicated for this purpose. However, the observed reduction in mortality and myocardial infarction 40 weeks after PTCA in the fluvastatin treated group has not been previously reported with statin therapy. Accordingly, a priori investigation of this finding is indicated and a new clinical trial with this intention is already underway.  (+info)

TY - JOUR. T1 - Discrepancy between computed tomography coronary angiography and selective coronary angiography in the pre-stenting assessment of coronary lesion length. AU - Soon, K. H.. AU - Farouque, H. M.O.. AU - Chaitowitz, I.. AU - Cox, N.. AU - Selvanayagam, J. B.. AU - Zakhem, B.. AU - Bell, K. W.. AU - Lim, Y. L.. PY - 2007/10/1. Y1 - 2007/10/1. N2 - We aimed to compare the lesion length measured on computed tomography coronary angiography (CT-CA) with the selective coronary angiography (SCA) lesion length measured on quantitative coronary angiography (QCA). Compared with SCA, CT-CA has the advantage of showing the lumen and the atherosclerotic plaque in the arterial wall. This prospective observational study involved 44 coronary lesions. Computed tomography coronary angiography was carried out with an electrocardiogram-gated 16-slice CT before percutaneous coronary intervention. A cardiologist and a radiologist measured CT lesion lengths in consensus, whereas an interventional ...
Computed tomography coronary angiography (CTCA) has evolved as a non-invasive imaging technology that can be used as an alternative first-line diagnostic test in symptomatic patients with low to intermediate likelihood of coronary artery disease (CAD).1 Nevertheless, it has not (yet) fulfilled initial expectations that it would be able to replace conventional invasive coronary angiography because CTCA tends to overestimate the severity of the coronary stenosis, resulting in a number of patients with false-positive outcomes that is too high. This is mainly caused by the blooming effect of calcified lesions in combination with the still too limited spatial resolution of CTCA as compared with invasive coronary angiography. CTCA provides, additional to luminography, comprehensive assessment of the anatomical manifestations of coronary atherosclerosis, including the distribution (proximal, mid and distal) and extent (one-, two-, three-vessel disease, left main disease) of CAD, the presence of ...
Coronary angiography is a key diagnostic tool in the management of patients with coronary artery disease. Coronary angiography is used to identify narrowing in coronary arteries and is used for decision support to ascertain the need for revascularization to minimize the risk of myocardial infarction. Various research studies have evaluated trends in the use and results of coronary angiography as key contributory factors to the variations seen in rates for coronary revascularization across the US. For example, a large study by Chan, et al. highlighted that inappropriate revascularization rates ranged from 0% to 55% in different facilities[i]. The use of diagnostic angiography has been advocated in different guidelines to ensure that the revascularization is warranted, however, this approach does not address inappropriate selection of patients for a diagnostic angiography.. According to the American Heart Association (AHA), coronary angiography is not recommended in patients who are at low risk ...
The Combined Coronary angiography and myocardial perfusion imaging using 320 detectors computed tomography (CORE-320) was designed as a prospective, multi-center, international, blinded study designed to evaluate the diagnostic accuracy of multi-detector computed tomography using 320 detectors for identifying coronary artery luminal stenosis and corresponding myocardium perfusion defects in patients with suspected coronary artery disease. The primary analysis will be a comparison of the diagnostic capability of the combination of quantitative 320-MDCT angiography and quantitative perfusion imaging to the combination of conventional coronary angiography and SPECT myocardial perfusion imaging at the patient level. A positive patient will be defined as having at least one vessel with a ≥ 50% diameter stenosis defined by quantitative coronary angiography and a corresponding positive SPECT territorial myocardial perfusion defect ...
Coronary angiography remains the gold standard for imaging coronary anatomy and defining the extent and precise location of coronary artery disease. Optimal coronary angiography is dependent on a thorough knowledge of coronary anatomy and a systematic imaging sequence protocol that enables visualization of all coronary segments, particularly areas of vessel overlap, bifurcations, or tortuous anatomy. A basic map of the coronary anatomy is delineated in Figure 69-1, and the optimal views for imaging each coronary segment are summarized in Table 69-1 (Figs. 69-2, 69-3, 69-4, 69-5). Although standard views are generally consistent from one patient to the next, the precise angulations tend to vary based on the variations in anatomic orientations. A number of coronary segment numbering systems have been established; the most commonly used is the Coronary Artery Surgery Study (CASS) numbering system derived from the Bypass Angioplasty Revascularization Investigation (BARI) study,1 which assigns a ...
INTRODUCTION. Over the past few years, multidetector computed tomography (MDCT) has been demonstrated as a feasible alternative to invasive coronary angiography (ICA), allowing noninvasive evaluation of the coronary arteries.1-4 However, contradictory results have been reported regarding the effect of coronary artery calcium score (CS) on the diagnostic accuracy of MDCT.5,6 With the first generations of MDCT scanners, severe coronary calcifications were recognized as an important factor hampering precise evaluation of coronary artery stenosis, thereby limiting diagnostic accuracy. Calcified plaques produce artifacts (blooming) which may affect the evaluation of luminal obstruction.7 At the same time, more extensive coronary calcification increases the likelihood that the patient has obstructive coronary artery disease,8,9 and ICA is usually required for definitive diagnosis and treatment. Advances in temporal and spatial resolution, especially the introduction of 64-detector rows, and growing ...
Coronary angiography (an-jee-OG-ra-fee) is a test that uses dye and special x rays to show the inside of your coronary arteries. The coronary arteries supply blood and oxygen to your heart. A material called plaque can build up on the inside walls of the coronary arteries and cause them to narrow. When this happens, its called coronary artery disease (CAD). This can prevent enough blood from flowing to your heart and can lead to angina (an-JI-nuh or AN-juh-nuh) (chest discomfort or pain) and heart attack. Coronary angiography shows if you have CAD. Most of the time, the coronary arteries cant be seen on an x ray. During coronary angiography, a special dye is injected into the bloodstream to make the coronary arteries show up on an x ray. To deliver the dye to your coronary arteries, a procedure called cardiac catheterization (KATH-e-ter-i-ZA-shun) is used. A long, thin, flexible tube called a catheter is put into a blood vessel in your arm, groin (upper thigh), or neck. The tube is then ...
A 34-year-old Coloured man had typical angina pectoris which was unresponsive to medical therapy. There was no history of factors predisposing to atherosclerosis apart from moderate cigarette smoking. A resting ECG suggested a previous nontransmural anterolateral myocardial infarction, and a submaximal effort test was strongly positive for myocardial ischaemia. Serological investigation for syphilis was positive, and initially the possibility that coronary ostial stenosis was the cause of his symptoms was strongly considered. Cardiac catheterization and selective coronary angiography showed evidence of an anterolateral myocardial infarction and that there was no coronary ostial stenosis, but total occlusion of the left anterior descending coronary artery (LAD) proximally with retrograde filling from the right coronary artery was revealed. The left circumflex coronary artery also showed some insignificant internal luminal irregularities. The patient was subjected to coronary artery bypass graft ...
TY - JOUR. T1 - Rapid disappearance of an endothelial ulceration in the left main coronary artery. AU - Bokhari, Ismail A H. AU - Bokhari, Ravia. AU - Alpert, Joseph S. PY - 2007/3. Y1 - 2007/3. N2 - A case is presented of a 65-year-old male who presented with an acute anterior wall myocardial infarction. An initial coronary angiogram demonstrated an ulcerated atherosclerotic plaque in the left main coronary artery. After 48 h of aggressive medical therapy including a 2b3a glycoprotein blocking agent, repeat angiography demonstrated resolution of the ulcerated plaque. The process of atherosclerotic plaque rupture is of dynamic nature.. AB - A case is presented of a 65-year-old male who presented with an acute anterior wall myocardial infarction. An initial coronary angiogram demonstrated an ulcerated atherosclerotic plaque in the left main coronary artery. After 48 h of aggressive medical therapy including a 2b3a glycoprotein blocking agent, repeat angiography demonstrated resolution of the ...
Learn more about Coronary Artery Angiography (Cardiac Catheterization) at Memorial Hospital function replaceEmbed(anmationName, embedContainerName) { var...
TY - JOUR. T1 - Anthropometric and bioclinical parameters in patients of coronary artery disease. AU - Venugopal, D.. AU - Vishesh, K.. AU - Shyamala, K. V.. PY - 2012/7/1. Y1 - 2012/7/1. N2 - The economic burden of CAD on any country is tremendous. It is expected that the rate of CAD will accelerate in the next decade. The obstructive impairment and number of vessels affected can interfere with the therapeutic strategy. Selective coronary angiography is the clinical diagnostic test for evaluating the coronary anatomy. Therefore, we can presume that if anthropometric values and biochemical parameters are predictive of the degree of anatomical impairment on coronary angiography, it will potentially be able to influence the decision of a strategy on invasive investigation in patients with ACS. Our project is hence an Endeavour to study the anthropometric and bioclinical profile of the patients with coronary artery disease and assessing them in relation to their angiographic severity. Methods: 100 ...
To study the role of 320-detector coronary computed tomography angiography (CTA) in assessing native coronary arteries in patients treated with coronary stents. 123 patients with coronary stenting received both CTA and conventional coronary angiography (CCA) within 1 day. The clinical parameters, coronary calcium scoring, CTA and CCA were analyzed to determine the prevalence of significant stenosis of native coronary arteries (SSNCA), the predictive value of CTA and the factors correlating with SSNCA and newly developed SSNCA after stenting (NDSSNCAS), with CCA as the standard of reference, using both vessel-based analysis (VBA) and patient-based analysis (PBA). Both the source and the reconstructed images were analyzed by CTA. All native coronary arteries were interpretable independent of cardiac motion. CTA showed a sensitivity/specificity of 93.5 %/97.3 % and 92.5 %/92.5 % in diagnosing SSNCA in VBA and PBA, respectively. The significant factors related to SSNCA were higher calcium scores (P ...
Acute coronary obstruction occurred in two patients during coronary angiography. In one case the obstruction was in the left main coronary artery; in the other it was close to the origin of the left anterior descending artery. In both cases acute cardiac ischaemia ensued, with electromechanical dissociation and collapse, which was not reversible by resuscitation. Rapid disobliteration of the occluded coronary artery was done with a guide-wire pushed through the obstruction via the coronary catheter. The recanalisation was completed by an intracoronary perfusion of streptokinase in one case. In both cases recovery was rapid and spectacular. The occurrence of acute ischaemia during coronary angiography should suggest accidental coronary occlusion. If a thromboembolic origin is suspected, transluminal disobliteration should be attempted. It is simple and can reverse a dangerous condition ...
When coronary artery disease is extensive and of relatively uniform severity, regional myocardial hypoperfusion may be balanced during stress, precluding development of spatially relative perfusion defects. Assessment of the washout of thallium-201 from myocardial regions may provide diagnostic assistance in these cases because washout analysis is spatially nonrelative and hypoperfused myocardial regions manifest a slow thallium-201 washout rate. In 1,265 consecutive patients having quantitatively analyzed stress-redistribution scintigraphy, 46 had a diffuse slow washout pattern with no or a maximum of one regional perfusion defect. Thirty-two underwent clinically indicated coronary angiography, and 23 (72%) of these were found to have three vessel or left main disease. Of 30 similar patients without a diffuse slow washout pattern and with no or a maximum of one perfusion defect, only 5 (17%) had extensive coronary disease. An independent relation between diffuse slow washout and extensive ...
Have we then found the "holy grail" of non-invasive coronary imaging?. The ability to visualise coronary arteries directly, assess cardiac function, and detect subclinical disease from a 20 second scan make MDCT more attractive than conventional stress testing. However, the significant radiation exposure makes it unattractive to screen the low risk population. Similarly, there is no justification for imaging high risk patients who clearly require coronary angiography and percutaneous intervention, without additional radiation exposure. It is unlikely that the financially constrained UK health system will adopt routine MDCT in the accident and emergency department to triage chest pain patients for "rule out" of pulmonary embolism, aortic dissection, and coronary disease.. The present niche of MDCT should be as an adjunct to coronary catheterisation in the assessment of patients and a useful gatekeeper ensuring appropriate triage of patients for catheterisation. This is especially true in the ...
Subjects in this study have recently had or are scheduled for a coronary angiography as part of their normal, routine medical care. This procedure uses x-ray imaging to see the inside of the hearts blood vessels.. This research study will evaluate the possible relationship between erectile dysfunction and vascular disease (diseases of the veins). In order to look at this possible relationship, subjects will complete a questionnaire which will ask questions regarding their sexual activity. Additionally, we will gather information from their medical records and take extra images during the coronary angiography procedure. ...
AIMS: To evaluate the diagnostic power of integrating the results of computed tomography angiography (CTA) and CT myocardial perfusion (CTP) to identify coronary artery disease (CAD) defined as a flow limiting coronary artery stenosis causing a perfusion defect by single photon emission computed tomography (SPECT). METHODS AND RESULTS: We conducted a multicentre study to evaluate the accuracy of integrated CTA-CTP for the identification of patients with flow-limiting CAD defined by ≥50% stenosis by invasive coronary angiography (ICA) with a corresponding perfusion deficit on stress single photon emission computed tomography (SPECT/MPI). Sixteen centres enroled 381 patients who underwent combined CTA-CTP and SPECT/MPI prior to conventional coronary angiography. All four image modalities were analysed in blinded independent core laboratories. The prevalence of obstructive CAD defined by combined ICA-SPECT/MPI and ICA alone was 38 and 59%, respectively. The patient-based diagnostic accuracy ...
Coronary calcium predicts the angiographic extent of CAD in symptomatic patients and provides independent and incremental information to the more conventional clinical parameters derived from SPECT or risk assessment.
Results of the ReACT Trial Presented at TCT 2016 and Published Simultaneously in JACC: Cardiovascular Interventions. WASHINGTON - November 1, 2016 - A randomized evaluation of routine follow-up coronary angiography after percutaneous coronary intervention (PCI) found that there was no long-term clinical benefit compared to clinical follow-up alone among unselected patients following PCI.. Findings from the ReACT trial were reported today at the 28th annual Transcatheter Cardiovascular Therapeutics (TCT) scientific symposium. Sponsored by the Cardiovascular Research Foundation (CRF), TCT is the worlds premier educational meeting specializing in interventional cardiovascular medicine. The study was also simultaneously published in JACC: Cardiovascular Interventions.. In this prospective, multicenter, open label, randomized study, patients who underwent successful PCI without planned staged PCI were randomly assigned to the routine angiographic follow-up (AF) group, in which they received coronary ...
Anomalous coronary arteries: Location, degree of atherosclerosis and effect on survival-a report from the Coronary Artery Surgery Study. J Am Coll Cardiol, 1989, 12, 531- 7. 27. , et al. Coronary anatomy in congenitally corrected transposition of the great arteries. Int J Cardiol, 2002, 86, 207-16. 28. B. Congenital heart defects and coronary anatomy. Tex Heart Inst J, 2002, 29, 279-89. 29. , et al. Influence of coronary anatomy on the anatomic repair of transposition of great arteries. Rev Esp Cardiol, 1996, 49, 451-6. Clinical importance of intramural blood vessels in the sino-atrial segment of the conducting system of the heart. Surg Radiol Anat, 1997, 19, 359-63. 17. , et al. A clinical angiographic study of the arterial blood supply to the sinus node. Chest, 1988, 94, 1054-7. 18. Gorlin, R. Coronary anatomy. Major Probl Intern Med, 1976, 11, 40-58. 19. , P. D. Leachman. Variations in coronary artery anatomy: Normal versus abnormal. Cardiovasc Dis, 1980, 7, 357- 70. 20. Angelini, P. Normal ...
Early identification of vulnerable plaques by remodeling index prior to rupture and development of acute event is of considerable importance especially by a reliable non-invasive method as CT coronary angiography (CTA), so we aim to evaluate coronary artery remodeling index in patients with low- to intermediate-risk stable angina by CTA. This single-center, cross-sectional, observational study included 150 patients with stable angina with normal resting ECG, negative markers, normal systolic function by 2D echocardiography (EF | 50%), and without regional wall motion abnormality at rest who were referred to MSCT evaluation of the coronary artery tree; the mean age was 56.8 ± 6.4 years, 83.3% had one-vessel disease, and 16.7% had two-vessel diseases. The mean remodeling index (RI) was 1.04 ± 0.28, 38% had significant positive remodeling, LAD was the most affected vessel (55.3), and proximal lesions were predominant in 48.5%; there was a statistically significant positive correlation between RI and
PURPOSE: To evaluate the performance of a computer aided algorithm for automated stenosis detection at coronary CT angiography (cCTA) using quantitative coronary angiography (QCA) as the reference standard.. METHODS: 59 patients (38 men, mean age 58±12y) underwent cCTA and QCA. In 29 patients cCTA was performed using dual-source CT (Definition™, Siemens, Forchheim, Germany) and in 30 patients using 64-slice CT (Sensation 64™, Siemens). All cCTA data sets were analyzed using a software algorithm (COR Analyzer™, Rcadia, Haifa, Israel) aimed at automated detection of coronary artery stenosis. The performance of the automated algorithm for detection of significant (≥50%) stenosis was compared with QCA based on a 10-segment coronary model. Performance of the automated algorithm was determined on a per-vessel and per-patient basis.. RESULTS: All cCTA data sets were successfully processed by the automated algorithm. QCA revealed a total of 40 stenoses ≥50% of which the software application ...
Measuring fractional flow reserve (FFR) during coronary angiography for diagnosis of chest pain can provide significant changes in the management of almost quarter of the patients.
Find the best coronary angiography doctors in Gurgaon. Get guidance from medical experts to select coronary angiography specialist in Gurgaon from trusted hospitals - credihealth.com
Pre-operative assessment of coronary artery disease with conventional coronary angiography has been recommended in the guidelines of the American College of Cardiology/American Heart Association for selected patients scheduled for cardiac valve surgery (15). Recently introduced multislice CT allows noninvasive coronary artery imaging and has been shown to reliably exclude significant coronary artery stenosis (8,9). The major advantage of multislice CT over conventional coronary angiography in patients with acute IE is its noninvasiveness and thus avoidance of the high embolization risk of valvular vegetations during catheter manipulation. Once spread into the systemic arterial circulation, those vegetations can cause severe complications such as cerebral or peripheral embolization (17).. In this study, multislice CT showed an excellent diagnostic performance in assessing morphologic abnormalities commonly seen in patients with IE. Accuracy of vegetation, abscess, and pseudoaneurysm detection ...
Introduction: Coronary CT angiography (CCTA) is an accurate and emerging diagnostic tool for evaluation of patients suspected of having coronary artery disease (CAD). Data on downstream testing, patient management and prognosis are important to further delineate the role of CCTA in clinical practice.. Hypothesis: We hypothesized that a normal CCTA in symptomatic patients does not lead to multiple diagnostic testing, influences patient management and indicates a favorable prognosis.. Methods: Prospective observational investigation of consecutive chest pain patients (without known CAD) having a normal 64-slice dual source CCTA study (no coronary plaques) from February 2007 to April 2009. Patient use of anitplatelet and lipid lowering therapy before and after the index CCTA, the use of additional downstream diagnostic testing (stress testing, myocardial perfusion imaging and invasive coronary angiography), and the occurrence of all-cause death or non-fatal myocardial infarction was recorded from ...
About Coronary Angiography Coronary Angiography, or Angiogram, is a minimally invasive procedure which is done to show the amount of coronary artery disease in the blood vessels that supply the heart. Coronary arteries can become clogged from a build-up of cholesterol, cells or other substances (plaque). This can reduce the flow of blood to your heart, causing chest pain,
Overall, 699 patients were randomized. The mean age was 50 years, 55% were women, mean body mass index was 28 kg/m2, and 6% had diabetes. The proportion of patients that underwent invasive coronary angiography during the index hospitalization was 6.6% with coronary CT angiography versus 6.2% with standard stress testing (p = NS).. In the coronary CT angiography group, no significant stenosis was detected in 82%, at least one severe stenosis (,70%) in 3.6%, and moderate stenosis (25-70%) in 10.2%. Stress testing was additionally required in 37 patients. Ultimately, nine percutaneous coronary intervention (PCI) and four coronary artery bypass grafting (CABG) procedures were performed. No acute coronary syndrome occurred when there was no evidence of severe obstruction ...
This thesis focus on the physiological information, on left ventricular (LV) motion in the long axis, evaluated in routine coronaty angiography sequences and based on previous knowledge from echocardiographic studies. As coronary angiography has become a very frequent examination, a method for assessment of LV function from routine coronary angiograms would probably have a significant impact on clinical work. Therefore, the motion of the left coronary artery is analysed in the studies described below.. In a pilot study of 84 patients, refetTed for coronaty and LV angiography, the systolic descent of the left coronary ostium (LCO) towards apex was measured. This simple manual measure from routine coronary angiograms showed a mean amplitude of 9.6 mm (range 3.0-15.0) and significant linear correlation to ejection fraction (EF) (r = 0.72, SEE = 10.1, p , 0.001).. In the second study, including 28 patients, coronary angiography and echoeardiography was used for measurement of circumflex artery ...
Get low cost and best cardiac angiography in India at world class accredited hospitals at your preferred locations in India. Get a QUOTE today.
CORONARY ANGIOGRAPHY/CARDIAC CATHETERISATION. Coronary angiography is performed in an X-ray lab (known as the Catheterisation Lab). A small calibre plastic tube (known as catheter) is positioned non-surgically through the skin in the groin or the wrist into an artery (figure 1). The catheter is then moved without pain to the heart and contrast injection is delivered to the arteries that supply the heart muscles. This allows the cardiologist to delineate and study the coronary arteries in great details and to determine if there are significant narrowings or blockages of the arteries (figure 2, figure 3).. ...
Li M, Zhang GM, Zhao JS, Jiang ZW, Peng ZH, Jin ZT, Sun G. Diagnostic performance of dual-source CT coronary angiography with and without heart rate control: systematic review and meta-analysis. Clinical Radiology 2014; 69(2): 163- ...
Interventional device developer Stentys has received CE Mark approval of its disconnectable and self-expanding stent platform for treatment of coronary artery bifurcations.
This TIMI classification was developed by the TIMI (Thrombolysis In Myocardial Infarction) study group to semiquantitatively assess coronary artery perfusion beyond point of occlusion on coronary angiography.
Objective: To evaluate the agreement between multislice CT (MSCT) and intravascular ultrasound (IVUS) to assess the in-stent lumen diameters and lumen areas of left main coronary artery (LMCA) stents. Design: Prospective, observational single centre study. Setting: A single tertiary referral centre. Patients: Consecutive patients with LMCA stenting excluding patients with atrial fibrillation and chronic renal failure. Interventions: MSCT and IVUS imaging at 9-12 months follow-up were performed for all patients. Main outcome measures: Agreement between MSCT and IVUS minimum luminal area (MLA) and minimum luminal diameter (MLD). A receiver operating characteristic (ROC) curve was plotted to find the MSCT cut-off point to diagnose binary restenosis equivalent to 6 mm2 by IVUS. Results: 52 patients were analysed. Passing-Bablok regression analysis obtained a β coefficient of 0.786 (0.586 to 1.071) for MLA and 1.250 (0.936 to 1.667) for MLD, ruling out proportional bias. The α coefficient was ...
Dislodgement and embolization of the new generation of coronary stents before their deployment are rare but could constitute a very serious complication. We report a case of a stent dislodgement into the left main coronary artery during the pri
Looking for Coronary Angiography? Choose from 3 clinic(s) offering Coronary Angiography treatment in 3 countries. Get quotes fast & choose the best. | Page 0
A 57-year-old homeless man presented to the emergency room after a syncopal episode. He reported a two-day history of shortness of breath and upper back pain. He was noted to be hypotensive with a blood pressure of 92/69 mmHg. An electrocardiogram showed ST-segment elevations in the inferolateral leads. Emergent coronary angiography revealed diffuse obstructive disease in the left anterior descending coronary artery, occlusion of the distal left circumflex coronary artery and complete total occlusion of the proximal right coronary artery. The left circumflex lesion was felt to be the culprit and it was treated with balloon angioplasty. Echocardiography revealed a left ventricular ejection fraction (LVEF) of 15-20% with a contained rupture and pseudoaneurysm involving the lateral wall. He was recommended coronary artery bypass graft surgery and repair of the left ventricular (LV) pseudoaneurysm, which he refused. He was discharged with medical treatment and presented with NYHA Class III heart ...
Asian Heart Institute have top cardiologist in Mumbai. As well as High-tech CT coronary angiography machines. Contact now & get treated
Objectives: To evaluate spatial plaque distribution patterns in coronary arteries based on computed tomography coronary angiography data sets and to express the learned patterns in prediction rules. An application is proposed to use these prediction rules for the detection of initially missed plaques. Material and Methods: Two hundred fifty two consecutive patients with chronic coronary artery disease underwent contrast-enhanced dual-source computed tomography coronary angiography for clinical indications. Coronary artery plaques were manually labeled on a 16-segment coronary model and their position (ie, segments and bifurcations) and composition (ie, calcified, mixed, or noncalcified) were noted. The frequent itemset mining algorithm was used to statistically search for plaque distribution patterns. The patterns were expressed as prediction rules: given plaques at certain locations as conditions, a prediction rule gave evidence-with a certain confidence value-for a plaque at another location ...
The Orthopedics PERL Channel contains hundreds of items, including full-color medical illustrations, medical animations and patient education articles. The Orthopedics Channel covers topics relevant to skeletal and muscular anatomy, orthopedic injury and repair, and general sports medicine. Health Animation channels are produced by Nucleus Medical Media, Inc.
In some cases, the diagnosis of coronary heart disease (CHD) can be assumed with a high degree of probability after a careful study of the patients complaints and his lifestyle. An electrocardiogram helps clarify the diagnosis (recorded at rest and during exertion). If the heart muscle has been damaged, then a cardiac ultrasound (echocardiograph) is of great help in diagnosing coronary heart disease along with MSCT (multi-slice computed tomography) of the coronary arteries. However, the gold standard study for diagnosing this disease is coronary angiography.
Structural simulations have been particularly useful in assessing the outcomes of kissing balloon inflation (KBI) after bifurcation stenting strategies. Previous studies have demonstrated that KBI may cause an elliptic deformation and coating damage of the proximal segment, altered strut configuration, possible arterial injury at the side branch ostium, and high wall stresses that may lead to arterial injury (36,37). Therefore, a minimal balloon overlap was suggested, which would diminish the elliptic deformation after KBI (38). In addition, a short noncompliant balloon in the proximal segment may correct local stent deformation (39). A recent study in 54 computer-simulated stent deployments compared the standard final KBI with a modified approach where the side branch balloon was inflated first and then both balloons were inflated simultaneously with unequal pressures. This study demonstrated that the modified technique for final KBI reduces the elliptical stent deformation in the proximal main ...
TY - JOUR. T1 - Feasible scan timing for 320-row coronary CT angiography generated by the time to peak in the ascending aorta. AU - Shirasaka, Takashi. AU - Nagao, Michinobu. AU - Yamasaki, Yuzo. AU - Kojima, Tsukasa. AU - Kondo, Masatoshi. AU - Shimomiya, Yamato. AU - Kamitani, Takeshi. AU - Honda, Hiroshi. PY - 2019/3/1. Y1 - 2019/3/1. N2 - Purpose: A 320-row CT scanner can briefly scan the entire heart. Therefore, the feasible scan timing is required. The aim of this study was to propose a refined method for feasible scan timing for coronary CT angiography (CCTA) using a time-density curve of the ascending aorta (AAo). Methods: One-hundred and twenty-nine patients were prospectively enrolled. All patients were performed test-bolus method. For the initial 65 patients, the scan timing was determined as a 3.0 s delay at the peak time in the AAo, which was defined as the conventional protocol (COV-P). For the next 64 patients, a scan timing of 1.0, 3.0, or 5.0 s delay was determined according to ...
This editorial refers to Changes in symptoms of anxiety and depression following diagnostic angiography: a prospective cohort study, by T.A. Hanssen et al., on page 106 ...
Average age was 57 ± 10 years and 56% of subjects were male. Patients were followed for 3-49 months (median 20). Of those randomized to CCTA, 1,778 (86%) had the study accomplished. CCTA revealed normal coronary arteries in 654 (37%), mild nonobstructive disease in 372 (21%), intermediate nonobstructive in 300 (17%), and obstructive in 452 (25%) of study subjects. At 6 weeks, CCTA was associated with a higher rate of referral for standard coronary arteriography (94 vs. 8; odds ratio [OR], 12.85; p < 0.0001). Over the total trial period, the number of standard coronary arteriograms performed did not differ between the CCTA and standard of care groups (409 vs. 401; hazard ratio [HR], 1.06; p = 0.451). Standard coronary arteriography demonstrated normal coronary arteries in 20 patients in the CCTA group versus 56 in the standard of care group (HR, 0.39; p < 0.001) and was more likely to show obstructive disease (283 vs. 30; HR, 1.29; p = 0.005) in the CCTA cohort. Compared to standard care, more ...
Three-dimensional rotational coronary angiography (3DRCA) is a new technique for imaging coronary vessels in the human body. Due to the residual cardiac motion, projections being in the same cardiac motion state are extracted from the acquired series using electrocardiogram (ECG) information. A gating window is determined at a pre-defined trigger delay relative to the R-peaks with a constant width. In order to achieve the best possible image quality, cardiac phases must be found during which the heart is nearly stationary. However, the (ECG) signal represents the electrical activity of the heart and corresponds to the heart movement only approximately. Currently, the optimum gating window positioning is based on values derived by experience. It is difficult to determine where the heart is most stable in the cycle due to a high patient variability. Furthermore, the optimal gating window position is depending on the coronary vessel segment. The purpose of this work is to introduce a simple and ...
... usually takes 30 minutes to 2 hours to be performed. The procedure is performed in the X-ray room. You will be asked to lie on the X-ray table, that has a few cameras that can move around your chest area for taking pictures. Sedatives will be given to you via the intravenous line (IV) instered in your arm. You will be asked to stay awake during the procedure so that you can do deep breathing, coughing and move your arms. Catheter will be inserted into your blood vessel via arm or groin. Catheter will be tactfully threaded to your coronary arteries. Blood pressure and oximonitor will be used your blood. Anticoagulants will be given to ensure there is no blood clotting on the catheter or coronary artery. You will feel a brief flushing when a contrast material (dye) is inserted in your body through the catheter. The dye moves through your arterties and the doctor observes the flow. X-ray images will be taken continously ...
Left heart cath, selective coronary angiography, LV gram, right femoral arteriogram, and Mynx closure device. Normal stress test.
A computerized tomography (CT) coronary angiogram is an imaging test that looks at the arteries that supply your heart with blood. Unlike traditional coronary angiograms, CT angiograms dont use a catheter threaded through your blood vessels to your heart.
An angiographic catheter includes a relatively soft, tip portion having a preformed curvature, and a resilient body portion extending therefrom having a preformed curvature in the opposite direction. A lumen extends through the catheter for the injection of angiographic dye therethrough to the right coronary artery. The part of the body portion of the catheter which it in the aortic arch of the patient during use has an amount of curvature which is less than the amount of curvature of the aortic arch, so that the body portion of the catheter is resiliently deformed where it passes through the aortic arch. The deformation results in the biassing of the tip portion of the catheter into the ostium of the right coronary artery. Upon insertion into the aorta the preformed catheter is oriented so that the curvature of the body portion of the catheter corresponds in direction to the curvature of the aortic arch, the tip portion of the catheter being disposed above the ostium of the right coronary artery with
Coronary angiography is a specialized X-ray test which gives perfect insight in the structure and functioning of the coronary arteries.
Summary: Concerning international comparison for the year 2011, Austria is situated under the top nations with 6,383 diagnostic coronary angiographies (CA), 2,407 percutaneous coronary interventions (PCI), and 47 transarterial aortic valve implantations (TAVI) per 1 million inhabitants in Europe. Although the number of TAVI increases rapidly since its first introduction in 2007 (47 TAVI per 1 million inhabitants in 2011, not including surgical cases from the transapical route), the data for CA and PCI remained constant during the past years. The rates of stent (91 %) and drug-eluting stent implantations (78 % of stents) also remained constant on a high level. Little fluctuation is also reflected in the complication data (including mortality evaluation). An increased morality is well known, especially in patients with the so-called ST-segment elevation myocardial infarction and consecutive shock (19-35 % in the past years). The application of certain special devices increased (clot catcher) or decreased
With the hybrid positron emission tomography (PET) and computed tomography (CT) systems, coronary artery anatomy and physiology can be realized during the same imaging session. Whereas the coronary CT angiography provides information on the presence and extent of the luminal stenosis in coronary artery disease (CAD), PET blood flow tracers provide information on the downstream functional consequence of these lesions. Current clinical applications of these imaging studies are focused predominantly on the identification of coronary artery lesions, which can be treated by coronary interventions. With the evolving technology, CT angiography may allow interrogation of the plaque morphology beyond the assessment of the luminal stenosis and the new radio-labeled ligands may expand the application of PET to assess plaque biology and instability. This is particularly relevant in asymptomatic subjects with coronary risk factors in whom the diagnosis often remains elusive before the actual occurrence of an ...
The present analysis gives a representative overview of sex‐associated differences in PCI in Germany from 2007 until 2009. We found that 27.8% of all PCIs were performed in women despite the fact that mortality rates due to coronary heart disease in Germany are almost the same in women and men.1, 2 This rate of PCI is comparable to that in the United States.3 It is not yet completely understood why this difference in use of invasive coronary procedures between men and women exists in spite of the established benefits of PCI in reducing fatal and nonfatal ischemic complications.21. Women with PCI were older than men, and they had more comorbidity. The largest difference of about 10 years was found in STEMI patients, which has been described before.5 We did not find any evidence that primary success rate of PCI was lower in women than in men. In elective PCI and NSTE‐ACS, it was even higher in women than in men, as was the percentage of implanted stents. This finding is in line with former ...
Coronary CT angiography has become a robust imaging technique for visualization of the coronary arteries. The most common application is to use this noninvas...
... is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the arteries in your heart.
A coronary angiography is a fairly common procedure. The steps which are taken during this procedure are fairly standard, however vary greatly dependi
Get quotes fast and Choose from 1 clinic(s) offering Coronary Angiography treatment in Mexico Get quotes fast & choose the best with phone numbers, reviews, prices, maps and pictures. | Page 0
A 64-year-old woman was complicated with acute type A dissection arising from the left main trunk during percutaneous coronary angiography. As the extent of dissection was localized in the ascending aorta, a bare-metal stent was inserted into the lef
Based on the method described by Reiber et al. (20), we devised and validated a simplified approach for estimating linear vessel tapering and calculating luminal stenosis severity on CCTA. Our method showed strong correlation to IQCA; the Pearson r-coefficient of 0.82 is similar to that reported by Raff et al. (3) (r = 0.76) and higher than that reported by Leber et al. (12) (r = 0.54). In the latter study, quantification of CCTA stenosis was based on the luminal diameter ratio of the stenotic site to proximal "healthy" vessel (12). Our method may have achieved higher correlation with IQCA in part by accounting for reference points proximal and distal to the stenosis and by assessing strictly luminal stenosis rather than accounting for positive remodeling. That our quantitative correlation was nearly identical to Raff et al. (3) (p = 0.94) despite studying older patients (mean age of 66 vs. 59 years) with higher global coronary calcification (mean coronary calcium score of 752 vs. 326) ...
The appropriate use of any rapidly improving technology is difficult to define, and coronary angiography with computed tomography (CT-angio) is no exception (1). In the study by Hausleiter and colleagues, CT-angio with a 64-slice scanner had per-segment sensitivity and specificity , 90%. The improved resolution probably contributed to the low number of patients with poor images, all of whom were included in the analysis. Another strength of the study is the sample of intermediate-risk patients who are most likely to benefit from the test findings. Assuming that the results of this study can be extrapolated to regular practice, CT-angio seems to be useful as an alternative to traditional angiography in patients with an intermediate probability of CAD, particularly those concerned about having an invasive procedure. The high negative predictive value of CT-angio (99%) means that a negative result would end ischemic evaluation in , 40% of patients. CT-angio may have an even more important role as ...
Dapatkan estimasi biaya untuk CT Coronary Angiogram di Cikarang pada pilihan rumah sakit dan dokter terbaik. Tim ahli medis kami siap memandu Anda memilih tindakan CT Coronary Angiogram yang paling tepat
Coronary computed tomography angiography (CCTA) is a noninvasive method to image the coronary arteries. Applications include the following: Diagnosis of coronary artery disease (CAD) Diagnosis of in... more
Aims The aims of the Swedish Web-system for Enhancement and Development of Evidence-based care in Heart disease Evaluated According to Recommended Therapies (SWEDEHEART) are to support the improvement of care and evidence-based development of therapy of coronary artery disease (CAD). Interventions To provide users with online interactive reports monitoring the processes of care and outcomes and allowing direct comparisons over time and with other hospitals. National, regional and county-based reports are publicly presented on a yearly basis. Setting Every hospital (n=74) in Sweden providing the relevant services participates. Launched in 2009 after merging four national registries on CAD. Population Consecutive acute coronary syndrome (ACS) patients, and patients undergoing coronary angiography/angioplasty or heart surgery. Includes approximately 80 000 new cases each year. Startpoints On admission in ACS patients, at coronary angiography in patients with stable CAD. Baseline data 106 variables ...
A coronary angiogram is an X-ray of the coronary arteries (the arteries that supply blood to your heart) to see if they are narrowed or blocked. ...
A computerized tomography (CT) coronary angiogram is an imaging test that looks at the arteries that supply your heart with blood. Unlike traditional coronary angiograms, CT angiograms dont use a catheter threaded through your blood vessels to your heart.
The medium-term follow-up data from the ABSORB trial were published in the recent issue of the Lancet. (3) At 2 years after implantation the BVS stent was completely bioabsorbed with restoration of vasomotion and no need for ischaemia-driven repeat revascularisation. In the 29 out of the 30 patients for whom follow-up data were available, the clinical outcomes at 2 years included only 1 (3.6%) non Q-wave myocardial infarction but no cardiac deaths or ischaemia-driven target lesion revascularisation (TLR). In addition there were no instances of stent thrombosis. At 18 months, multislice CT confirmed a mean diameter stenosis of 19 ± 9%. At 2 year coronary angiography, the in-stent late loss and diameter stenosis were shown to be 0.48 mm (SD 0.28) and 27% respectively. These did not differ from the findings at 6 months. At OCT, 34.5% of the stent strut locations presented no discernable features confirming decreases in echogenicity and radiofrequency backscattering, with the remaining apparent ...
You will be given a mild sedative to help you relax. An area of your body, usually the arm or groin, is cleaned and numbed with a local numbing medicine (anesthetic). The cardiologist passes a thin hollow tube, or catheter, through an artery and carefully moves it up into the heart. A special dye called contrast media is then injected into the coronary arteries, and x-rays are taken to see how the dye flows through your heart. The test may last 30 to 60 minutes, but the entire procedure including pre- and post-op care can take 4 to 12 hours.. ...
Angiography is a special type of x-ray that allows your coronary arteries to be viewed and recorded on film. Your doctor can see if the blood vessels to your heart are clogged.
Modern day cardiac scientists have legally defined a significant coronary lesion as | 70 % obstruction. Unfortunately this rule is applicable more in academic forums not in cath labs. While the guidelines seem to be clear in chronic coronary syndromes , in ACS the interventional strategies based on severity of lesion is not clearly defined.…
Advanced search allows to you precisely focus your query. Search within a content type, and even narrow to one or more resources. You can also find results for a single author or contributor. ...
Coronary artery disease can be termed as New age plague afflicting the mankind ! It probably has killed ( or Killing ) as many lives as most other diseases put together. Why only a section of our population is vulnerable is not fully understood . We are familiar with coronary risk factors for…
Jonathan Frazier, PharmD Candidate 2015, Mercer University College of Pharmacy Acute coronary syndrome (ACS), more commonly known as heart attack or unstable angina, is an umbrella term for any situation in which blood flow to the heart is suddenly blocked. The sudden blockage is often due to a build up of plaque in the arteries, causing…
Coronary CT angiography (CCTA) identified plaques in acute MI patients whose coronary angiograms did not produce evidence of significant coronary stenosis.
Before a scheduled angioplasty, your doctor will review your medical history and do a physical exam. Youll also have an imaging test called a coronary angiogram to see if your blockages can be treated with angioplasty. A coronary angiogram helps doctors determine if the arteries to your heart are narrowed or blocked.. In a coronary angiogram, liquid dye is injected into the arteries of your heart through a catheter - a long, thin tube thats fed through an artery from your groin, arm or wrist to arteries in your heart. As the dye fills your arteries, they become visible on X-ray and video, so your doctor can see where your arteries are blocked. If your doctor finds a blockage during your coronary angiogram, its possible he or she may decide to perform angioplasty and stenting immediately after the angiogram while your heart is still catheterized.. Youll receive instructions about eating or drinking before angioplasty. Usually, youll need to stop eating or drinking six to eight hours before ...
Using non-invasive CT scan technology, CCTA takes a 3D picture of a beating heart in about five seconds. The digital pictures give doctors excellent image quality. They can quickly evaluate the heart and coronary arteries for plaque, a blockage or heart disease.
Bourdillon questions guidance from the National Institute for Health and Clinical Excellence (NICE) that exercise electrocardiography (ECG) has no role in diagnosing obstructive coronary disease causing angina (or in diagnosing angina, as NICE says incorrectly).1 2 Perhaps a more cogent reason for questioning this conclusion is that NICE considered only diagnosis and took no account of downstream testing or … ...
There is no indication of postprocedural cognitive impairment for patients undergoing coronary angiography (CA) or percutaneous coronary intervention (PCI), according to a study published in The American Journal of Cardiology.
My mother has small pain in below chest and back of chest, then doctor advise to go for an angiogram, Angiogram shows Findings: 1.left main: normal 2.LAD:type-III lad. proximal to mid lad shows long...
Question - Have chest pain, needed a coronary angiogram, diagnosed contrast induced nephropathy. What do I do?. Ask a Doctor about diagnosis, treatment and medication for Ischemic heart disease, Ask a Cardiologist
A prospective study found that the use of the Tryton side branch stent in patients undergoing PCI was effective in treating coronary artery bifurcations involving large side branches.
We use cookies to ensure that we give you the best experience on our website. If you click Continue we will assume that you are happy to receive all cookies and you will not see this message again. Click Find out more for information on how to change your cookie settings ...
Disclosures: Dr. Bamberg has received grants/funding from Bayer Healthcare & Siemens Healthcare. Dr. Choe has nothing to disclose. Dr. Funabashi has nothing to disclose. Dr. Schoepf is a consultant for and has received grants/funding from Bayer, Bracco, GE, Medrad, & Siemens.. ...
PPAR was a randomized, multicenter, double-blind, two-arm pilot study comparing the effects of rosiglitazone maleate (4 mg BID orally) before and after PCI in patients with obesity and hypertension, dyslipidemia, or glucose intolerance when compared to placebo. Between January 2002 and August 2003, a total of 200 patients from 10 centers were randomized from the population of patients undergoing diagnostic angiography followed by PCI and in those in whom coronary anatomy was known and PCI was planned. Written informed consent was obtained from all patients, and the protocol was approved by the institutional review board at each participating institution. The primary end point was progression rate in Doppler ultrasound-determined CIMT during the 12 month follow-up. The secondary end points included the net change in CIMT from baseline to 6 and 12 months; the composite of all-cause mortality, MI, stroke, or any coronary vessel revascularization at 12-month follow-up; the composite of all cause ...
Invasive imaging procedure, used to evaluate: presence of disease in the coronary arteries, valves or aorta, heart muscle function and determine need for treatment
Prospective data suggest cardiac MRI picks up culprit lesions frequently missed by invasive angiography, with implications for patients who ultimately undergo revascularization.
A brand new worldwide research discovered that whereas a brand new era of quicker computed tomography (CT) scanners simply and accurately recognized folks with blocked arteries, they werent correct sufficient in comparison with the standard coronary angiography. The research was led by senior investigator and heart specialist Dr João Lima, whos a professor of drugs…
Is PAD as prevalent in women as in men? Does CAD present differently in women and men? Is coronary angiography the most accurate diagnostic modality for women? Find answers and more details, here. 1
If serial stenoses are less than 3 vessel reference diameters apart, they should be scored as one lesion. However, stenoses at a greater distance from each other (more than 3 vessel reference diameters), are considered as separate lesions ...
What does an inconclusive angiogram test mean - What does an inconclusive angiogram test mean? Borderline. Not everythng is black or white. You could have a blockage in an artery which is not severe so that maybe it has nothing to do with your symptoms. The result then would be inconlusive. The test is not totally normal but the problem may not be severe enough to cause symptoms or require treatment.
Angiogram has several benefits when it comes to diagnosing certain heart conditions. However, it may have its own share of side effects too. This article elaborates on the possible side effects of an angiogram.
We provide a state-of-the-art intracoronary imaging system that helps you optimize the treatment of patients and master complex lesions. Our optics-based imagin
TY - JOUR. T1 - Metabolic syndrome and angiographic coronary artery disease prevalence in association with the framingham risk score. AU - Konstantinou, Dimitris M.. AU - Chatzizisis, Yiannis S.. AU - Louridas, George E.. AU - Giannoglou, George D.. PY - 2010/6/1. Y1 - 2010/6/1. N2 - Background: The association of metabolic syndrome with coronary artery disease (CAD) has been studied extensively. However, little is known about the effect of Framingham risk score (FRS) and metabolic syndrome components on the association of metabolic syndrome with angiographically significant CAD. Our aim was to investigate whether that relationship is influenced by individuals 10-year CAD risk profile as assessed by FRS. Furthermore, we sought to elucidate whether metabolic syndrome is associated with angiographically significant CAD independently of its individual components. Methods: We studied a consecutive sample of 150 patients undergoing coronary angiography for the evaluation of chest pain. Metabolic ...
TY - JOUR. T1 - Internal pudendal artery stenoses and erectile dysfunction. T2 - Correlation with angiographic coronary artery disease. AU - Rogers, Jason H. AU - Karimi, Houshang. AU - Kao, John. AU - Link, Daniel P. AU - Javidan, Javid. AU - Yamasaki, Dwayne S.. AU - Dolan, Mark. AU - Laird, John R.. AU - Low, Reginald. PY - 2010/11/15. Y1 - 2010/11/15. N2 - Objectives: To describe the angiographic characteristics of pelvic arterial disease in patients with erectile dysfunction (ED) nonresponsive to phosphodiesterase-5 inhibitors (PDE5i) and suspected coronary artery disease (CAD). Background: ED and CAD share common risk factors which can result in endothelial dysfunction, atherosclerosis and flow-limiting stenoses in the coronary and internal pudendal arteries. Methods: Ten patients undergoing cardiac catheterization with ED and a history of unsatisfactory response to a PDE5i were studied. ED severity was quantified using the International Index of ED scoring system. We performed angiography ...
TY - JOUR. T1 - Reimplantation of anomalous right coronary artery from left main coronary artery. T2 - A surgical option. AU - Karimi, Mohsen. AU - Murdison, Kenneth A. AU - Blackwood, Wesley. AU - Davis, Wesley. PY - 2010/4/1. Y1 - 2010/4/1. N2 - Anomalous right coronary artery (ARCA) from left sinus of Valsalva could present in several forms either being intramural or extramural, and most occurring with separate ostium from left coronary system. ARCA originating from the left main coronary artery (LMCA) is very rare and treatments proposed for this type of anomaly are pulmonary artery translocation or coronary artery bypass grafting (CABG) of the right coronary system. There has not been any report in the literature of successful reimplantation of ARCA from LMCA, to the best of our knowledge, as another surgical option for this anomaly. We are reporting a case of successful surgical reimplantation of an ARCA from LMCA.. AB - Anomalous right coronary artery (ARCA) from left sinus of Valsalva ...
TY - JOUR. T1 - Algorithm to predict triple-vessel/left main coronary artery disease in patients without myocardial infarction. T2 - An international cross validation. AU - Detrano, Robert. AU - Jánosi, A.. AU - Steinbrunn, Walter. AU - Pfisterer, Matthias. AU - Schmid, Johann Jakob. AU - Maggie Meyer, M.. AU - Guppy, Kern H.. AU - Abi-Mansour, Pierre. PY - 1991. Y1 - 1991. N2 - Logistic regression was applied to the clinical, risk factor, and exercise data of consecutive angiographic referrals without prior myocardial infarction to determine an algorithm predicting the probability of triple-vessel/left main coronary artery disease. These data were obtained from a total of 1,074 such subjects from patient populations at four centers (Cleveland Clinic Foundation, Cleveland, Ohio; Hungarian Institute of Cardiology, Budapest, Hungary; the university hospitals, Zurich and Basel, Switzerland; and the Veterans Administration Medical Center, Long Beach, Calif.) and used to derive four separate ...
TY - JOUR. T1 - Percutaneous coronary intervention with drug-eluting stent implantation vs. minimally invasive direct coronary artery bypass (MIDCAB) in patients with left anterior descending coronary artery stenosis. AU - Hong, Soon Jun. AU - Lim, Do-Sun. AU - Seo, Hong Seog. AU - Kim, Young Hoon. AU - Shim, Wan Joo. AU - Park, Chang Gyu. AU - Dong, Joo Oh. AU - Young, Moo Ro. PY - 2005/1/1. Y1 - 2005/1/1. N2 - The aim of this study was to assess the effects of percutaneous coronary intervention with drug-eluting stents (DESs) versus minimally invasive direct coronary artery bypass (MIDCAB) surgery in the management of patients with proximal left anterior descending (LAD) coronary artery stenosis. Until recent years, despite the advantages of percutaneous transluminal coronary angioplasty (PTCA) with bare metal stent implantation, such as shorter hospital stays and recovery time, MIDCAB showed better results with regard to the need for repeated intervention in the target vessel than PTCA with ...
TY - JOUR. T1 - Anomalous origin of the right coronary artery from the pulmonary artery associated with tetralogy of Fallot. T2 - Description of the pre-surgical diagnosis and surgical repair. AU - Pluchinotta, Francesca R.. AU - Vida, Vladimiro. AU - Milanesi, Ornella. PY - 2011/8. Y1 - 2011/8. N2 - Anomalous origin of the right coronary artery from the pulmonary artery is a rare congenital defect. We describe the case of an infant with anomalous origin of the right coronary artery from the pulmonary artery in association with tetralogy of Fallot. This patient had a pre-operative echocardiographic diagnosis, which was confirmed by angiography, and later underwent a successful surgical repair.. AB - Anomalous origin of the right coronary artery from the pulmonary artery is a rare congenital defect. We describe the case of an infant with anomalous origin of the right coronary artery from the pulmonary artery in association with tetralogy of Fallot. This patient had a pre-operative ...
The most frequent mechanism associated with coronary obstruction after TAVI has been the displacement of the calcified native cusp over the coronary ostium, and this has also been confirmed by the present review of the published data. In fact, no cases of coronary obstruction related to the struts of the transcatheter valve frame or to the cuff/leaflets of the transcatheter valve itself have been reported to date. Although the final mechanism leading to coronary obstruction after TAVI is well understood, the risk factors that predispose a patient to its occurrence remain largely unknown. A low position of the coronary ostia with respect to the aortic annulus has been highlighted as one of the most important factors contributing to this complication, and it has been suggested that a coronary ostia height cutoff ≤10 mm increases the risk of coronary obstruction during TAVI (41,42). In a recent post-mortem study, including 51 normal hearts, the mean LCA height, as determined by the LCA distance ...
Previous reports have indicated that hypertensive patients who have angina-like chest pain and normal coronary arteriograms have reduced coronary flow velocity reserve (CFVR) levels. In addition, elevated plasma endothelin-1 (ET-1) levels have been reported to be associated with microvascular angina. The purpose of this study was to evaluate the plasma ET-1 levels and CFVR in patients with chest pain but without coronary artery disease (CAD). A total of 66 patients were included in this study. CAD was ruled out by exercise stress test or coronary angiogram. Plasma ET-1 and CFVR measurements were performed in patients with (n=35) and without (n=31) a history of angina-like chest pain. CFVR was measured using adenosine-triphosphate stress transthoracic Doppler echocardiography. The mean ET-1 level was significantly higher and the CFVR was significantly lower in patients in the symptomatic group than in those in the asymptomatic group (ET-1: 3.85±1.24 pg/ml vs. 2.98±1.27 pg/ml, CFVR: 2.26±0.48 vs. 2.77
TY - JOUR. T1 - Comparison of Six-Month Outcomes for Primary Percutaneous Revascularization for Acute Myocardial Infarction With Drug-Eluting Versus Bare Metal Stents (from the APEX-AMI Study). AU - Patel, Manesh R.. AU - Pfisterer, Matthias E.. AU - Betriu, Amadeo. AU - Widmisky, Petr. AU - Holmes, David R.. AU - ONeill, William W.. AU - Stebbins, Amanda. AU - Van de Werf, Frans. AU - Armstrong, Paul W.. AU - Granger, Christopher B.. PY - 2009/1/15. Y1 - 2009/1/15. N2 - We evaluated the use and outcomes of drug-eluting stents (DESs) and bare metal stents (BMSs) in a large primary percutaneous coronary intervention (PCI) acute ST-elevation myocardial infarction (MI) trial. Recently concerns have been raised with "off-label" use of DESs for short- and long-term clinical outcomes. Limited randomized data exist evaluating DESs versus BMSs in ST-elevation MI. Patients (n = 5,745) in the Assessment of Pexelizumab in Acute Myocardial Infarction (APEX-AMI) trial were categorized by stent type used. ...
TY - JOUR. T1 - Correlation of cold pressor and flow-mediated brachial artery diameter responses with the presence of coronary artery disease. AU - Corretti, Mary C.. AU - Plotnick, Gary D.. AU - Vogel, Robert A.. PY - 1995/4/15. Y1 - 1995/4/15. N2 - Flow-mediated brachial and coronary artery vasoactivity are abnormal in patients with coronary artery disease (CAD) and cardiac risk factors. Cold pressor coronary artery vasoactivity is abnormal in patients with CAD, but brachial artery responses have not been studied. This study assesses whether cold pressor and flow-mediated brachial artery vasoactivity correlate independently with the presence of CAD. We studied 50 men (27 who were clinically normal, 23 with angiographically proven CAD) aged 23 to 59 years. With use of 7.5 MHz ultrasound, we measured brachial artery diameter and Doppler flow velocity at baseline, during contralateral ice water hand immersion (cold pressor), after 5 minutes of ipsilateral blood pressure cuff occlusion ...
Coronary angiography is used to determine the patency and configuration of the coronary artery lumens. ... "Assessment of Agatston Coronary Artery Calcium Score Using Contrast-Enhanced CT Coronary Angiography". American Journal of ... Coronary CT calcium scanEdit. A coronary CT calcium scan is a computed tomography (CT) scan of the heart for the assessment of ... "Heart scan (coronary calcium scan)". Mayo Clinic. Retrieved 9 August 2015.. *^ a b Neves, Priscilla Ornellas; Andrade, Joalbo; ...
Lopid Coronary Angiography Trial". Atherosclerosis. 139 (1): 49-56. doi:10.1016/S0021-9150(98)00053-7. PMID 9699891. de Maat MP ... such as progressive coronary atherosclerosis. The -1171 5A/6A variant has also been associated with congenital anomalies such ... "Progression of coronary atherosclerosis is associated with a common genetic variant of the human stromelysin-1 promoter which ... "Effect of the stromelysin-1 promoter on efficacy of pravastatin in coronary atherosclerosis and restenosis". The American ...
... such as coronary angiography and left ventricle angiography. Once the catheter is in place, it can be used to perform a number ... coronary angiography is a diagnostic procedure that allows the interventional cardiologist to visualize the coronary vessels. ... Diagnostic Cardiac Catheterization and Coronary Angiography. In: Kasper D, Fauci A, Hauser S, Longo D, Jameson J, Loscalzo J. ... It is important to note that the coronary arteries are not accessed during a right heart catheterization. Main page: Coronary ...
A comparison with thallium-201 and coronary angiography". Giornale italiano di cardiologia. 22 (7): 795-805. PMID 1473653. ... Gorlin R, Brachfeld N, MacLeod C. and Bopp P. Effect of nitroglycerin on the coronary circulation in patients with coronary ... If one is to evaluate ischemia (reductions in coronary blood flow resulting from coronary artery disease) then individuals must ... coronary aneurysm, wall motion abnormalities). Assessment of viable myocardium in particular coronary artery territory ...
"Transvenous Coronary Angiography in Humans using Synchrotron Radiation". Proc Natl Acad Sci USA. 83:9724: 9724-9728. doi: ... including intravenous coronary arteriography. They devised a synchrotron radiation based imaging system which has been used ...
... such as coronary angiography and left ventricle angiography. Once the catheter is in place, it can be used to perform a number ... Coronary catheterizationEdit. Main page: Coronary catheterization. Indications for diagnostic use of coronary catheterization ... coronary angiography is a diagnostic procedure that allows the interventional cardiologist to visualize the coronary vessels. ... Diagnostic Cardiac Catheterization and Coronary Angiography. In: Kasper D, Fauci A, Hauser S, Longo D, Jameson J, Loscalzo J. ...
Cardiology for diagnostic angiography, percutaneous coronary interventions, (pacemakers, implantable cardioverter ...
ISBN 978-0-7817-4524-6. Chassin MR, Kosecoff J, Solomon DH, Brook RH (1987). "How Coronary Angiography Is Used: Clinical ...
Campeau L. Percutaneous radial artery approach for coronary angiography. Cathet Cardiovasc Diagn 1989;16:3-7. Kiemeneij F, ... Bleeding and blood transfusion issues in patients with non-ST-segment elevation acute coronary syndromes Eur Heart J 2007;28: ... In past few years, transradial access for coronary intervention has become increasingly popular. The most advantageous aspect ... Studies show a lower rate of complications with transradial than with transfemoral catheterization in non-coronary ...
Chassin, M.R.; Kosecoff J.; Solomon D.H.; Brook R.H. (1987). "How Coronary Angiography Is Used: Clinical Determinants of ...
... such as coronary angiography, intravascular ultrasound or CT coronary angiography. For example, FFR takes into account ... The decision to perform a percutaneous coronary intervention (PCI) is usually based on angiographic results alone. Angiography ... January 2009). "Fractional flow reserve versus angiography for guiding percutaneous coronary intervention". N. Engl. J. Med. ... Fractional flow reserve (FFR) is a technique used in coronary catheterization to measure pressure differences across a coronary ...
Visipaque is commonly used as a contrast agent during coronary angiography. It is the only iso-osmolar contrast agent, with an ...
"How Coronary Angiography Is Used: Clinical Determinants of Appropriateness". JAMA. 258 (18): 2543-47. doi:10.1001/jama.258.18. ...
Developed Metro Coronary Screening for patients who have been phobic of conventional coronary angiography. It consists of ... coronary angiography through the elbow, echo and blood studies. It takes 5 minutes and patients go home within one hour. It has ... Society of Cardiac Angiography and Interventions, USA Fellow, Indian College of Cardiology Member, British Cardiovascular ...
Coronary angiography is used to determine the patency and configuration of the coronary artery lumens. Transthoracic ... "Assessment of Agatston Coronary Artery Calcium Score Using Contrast-Enhanced CT Coronary Angiography". American Journal of ... A coronary CT calcium scan is a computed tomography (CT) scan of the heart for the assessment of severity of coronary artery ... such as in coronary CT angiography. Magnetic resonance imaging (originally called nuclear magnetic resonance imaging), an ...
Also, ST elevation on EKG (see below) is more common in those patients with a cTnI > 1.5 µg/L. Coronary angiography in those ... The preferred NSAID is ibuprofen because of rare side effects, better effect on coronary flow, and larger dose range. Depending ...
Cardiac catheterization and coronary angiography are often performed to exclude ischemic heart disease. Genetic testing can be ... Coronary artery disease and high blood pressure may play a role, but are not the primary cause. In many cases the cause remains ...
According to Bokeria, the necessary medical procedures (coronary angiography and stenting) were "elementary". Bokeria said he ... Milošević should have been considered for a coronary bypass or angioplasty; while these operations might be rendered impossible ...
"NT-ProBNP Independently Predicts Long-Term Mortality in Patients Admitted for Coronary Angiography". Angiology. 65: 31-36. doi: ... "Incremental prognostic value of C-reactive protein and N-terminal proB-type natriuretic peptide in acute coronary syndrome". ... typically increased in patients with asymptomatic or symptomatic left ventricular dysfunction and is associated with coronary ...
... in people undergoing coronary angiography/percutaneous interventions. The effect was found to be stronger among those with ... "Statins for the Prevention of Contrast-Induced Nephropathy After Coronary Angiography/Percutaneous Interventions: A Meta- ... Low-density lipoprotein (LDL) carriers of cholesterol play a key role in the development of atherosclerosis and coronary heart ... Moreover, if a risk decision was uncertain, factors such as family history, coronary calcium score, ankle-brachial index, and ...
"Coronary Computed Tomography Angiography as a Screening Tool for the Detection of Occult Coronary Artery Disease in ... Coronary computed tomography angiography should not be used to screen people who are asymptomatic. Additionally, this test ... Coronary artery calcium scoring is a diagnosic test in the field of cardiovascular x-ray computed tomography. It is used to ... Asymptomatic people who have low risk, including a lack of family history of premature coronary artery disease, should not be ...
He died on 20 September 2015 after he had also undergone a coronary angiography. The cause of death was reported to be ...
... range independently predicts mortality in patients undergoing coronary angiography". Heart. 93 (4): 491-494. doi:10.1136/hrt. ... Coronary bypass surgery: If an enlarged heart is related to coronary artery disease, one may opt to have coronary artery bypass ... Cardiomegaly is not a disease but rather a condition that can result from a host of other diseases such as obesity or coronary ... Many times this condition results from high blood pressure (hypertension) or coronary artery disease. An enlarged heart may not ...
... range independently predicts mortality in patients undergoing coronary angiography". Heart. 93 (4): 491-494. doi:10.1136/hrt. ...
Coronary Angiography, Interventional Cardiology and Cardiac surgery amongst other facilities are on the horizon. Encouraged by ...
A Clinical Study of Gadoteric Acid in Non-Coronary Magnetic Resonance (MR) Angiography Knör, S; Modlinger, A; Poethko, T; ...
CT angiography. *Abdominal and pelvic CT *Virtual colonoscopy. *CT angiography *Coronary CT ...
Coronary CT angiography (CTA): the use of CT to assess the coronary arteries of the heart. The subject receives an intravenous ... "Assessment of Agatston Coronary Artery Calcium Score Using Contrast-Enhanced CT Coronary Angiography". American Journal of ... Coronary CT calcium scan: also used for the assessment of severity of coronary artery disease. Specifically, it looks for ... Main article: Computed tomography angiography. Computed tomography angiography (CTA) is contrast CT to visualize arterial and ...
Coronary computed tomography angiography (c-CTA) is more valuable in the diagnosis of coronary artery and cardiac anomalies, ... Keywords: Computed tomography angiography, coronary artery, anomaly. Ali Mahir G nd z. Coronary Artery Anomalies and Variations ... Coronary Artery Anomalies and Variations Detected in Computed Tomography Angiography. Ali Mahir G nd z. Department of Radiology ... There are studies indicating that c-CTA is superior to catheter angiography in the diagnosis of coronary artery anomalies. ...
TABLE 13-1 INDICATIONS FOR CARDIAC CATHETERIZATION AND CORONARY ANGIOGRAPHY Coronary Artery Disease. ... TABLE 13-1INDICATIONS FOR CARDIAC CATHETERIZATION AND CORONARY ANGIOGRAPHY. View Table,Favorite Table,Download (.pdf). ... "DIAGNOSTIC CARDIAC CATHETERIZATION AND CORONARY ANGIOGRAPHY." Harrisons Cardiovascular Medicine, 3e Loscalzo J. Loscalzo J Ed ... Leopold J.A., Faxon D.P. Leopold, Jane A., and David P. Faxon.DIAGNOSTIC CARDIAC CATHETERIZATION AND CORONARY ANGIOGRAPHY. In: ...
coronary-pulmonary artery fistula. *CT coronary angiography. *congenital anomalies of coronary arteries ... Coronary-pulmonary artery fistula is an uncommon cardiac anomaly, usually congenital. Most coronary-pulmonary artery fistulas ... This report describes a case of complex coronary-pulmonary artery fistula with two feeding vessels of separate origins: one ...
Coronary angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Cardiac angiography; Angiography - heart; Angiogram - coronary; Coronary artery disease - angiography; CAD - angiography; ... Coronary angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Coronary angiography is often done along with cardiac catheterization. This is a procedure which measures pressures in the ...
... coronary Coronary angiography is an X-ray of the heart and blood vessels of a living patient. The X-ray is taken with a moving ... camera, which produces a very detailed and accurate picture of the condition of the coronary arteries. ... Angiography, Coronary Medical Discoveries COPYRIGHT 1997 Thomson Gale. Angiography, coronary. Coronary angiography is an X-ray ... coronary angiography (ko-rŏn-er-i) n. see angiography. Cite this article Pick a style below, and copy the text for your ...
Coronary angiography is performed to detect obstruction in the coronary arteries of the heart. During the procedure a catheter ... Coronary angiography is performed to detect obstruction in the coronary arteries of the heart. During the procedure a catheter ...
Interventional X-ray coronary angiography is a primary tool to guide catheter-based coronary interventions. High-quality images ... Interventional X-ray coronary angiography is a primary tool to guide catheter-based coronary interventions. High-quality images ... Committee on Coronary Angiography). Developed in collaboration with the Society for Cardiac Angiography and Interventions. J Am ... ACC/AHA guidelines for coronary angiography. A report of the American College of Cardiology/American Heart Association Task ...
NICE guideline 95 proposes using CT coronary angiography (CTCA) in patients at low predicted risk of coronary artery disease ... CT coronary angiography leads to more accurate detection of coronary artery disease, fewer second-line investigations and more ... CT coronary angiography (CTCA) is a highly effective first-line investigation in those patients assessed to be at low- ... CT coronary angiography (CTCA) outperformed exercise tolerance testing (ETT) for each of the comparative measures described ...
... is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Cardiac angiography; Angiography - heart; Angiogram - coronary; Coronary artery disease - angiography; CAD - angiography; ... Angina - angiography; Heart disease - angiography. How the Test is Performed. Coronary angiography is often done along with ... Coronary angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ...
CORONARY ANGIOGRAPHY venothini My mother has small pain in below chest and back of chest, then doctor advise to go for an ... CORONARY ANGIOGRAPHY. My mother has small pain in below chest and back of chest, then doctor advise to go for an angiogram, ...
Coronary angiography shows if you have CAD. Most of the time, the coronary arteries cant be seen on an x ray. During coronary ... Coronary angiography (an-jee-OG-ra-fee) is a test that uses dye and special x rays to show the inside of your coronary arteries ... The coronary arteries supply blood and oxygen to your heart. A material called plaque can build up on the inside walls of the ... angiography, a special dye is injected into the bloodstream to make the coronary arteries show up on an x ray. ...
Coronary Angiography. Its Role in the Management of the Patient with Angina Pectoris. HAROLD A. BALTAXE, DAVID C. LEVIN ... The history, technic, and complications of coronary angiography have been discussed. Myocardial infarction caused by the ...
coronary angiography Also called coronary angiogram, coronary angiography is an X-ray test to diagnose diseases of the arteries ... Coronary angiography can detect weakened blood vessel walls and narrowed or blocked vessels. X-rays are taken after a special ...
... Coronary CT Angiography Dobutamine Echocardiogram Doppler Ultrasound Echocardiogram in Congestive Heart ... These images are a random sampling from a Bing search on the term "Coronary Angiography." Click on the image (or right click) ... Diastolic Heart Failure Kawasaki Disease Coronary CT Angiography Cardiac Imaging Cancer Risk due to Diagnostic Radiology Post- ... Angioplasty Aortic Angiography Apical Four Chamber Echocardiogram View Cardiac CT Calcium Scoring Cardiac Imaging Cardiac MRI ...
RCA: right coronary artery.. b: Conventional selective coronary angiography of the same patient, in the LAO orientation, ... 2 Dill T, Dix WR, Hamm CW, Jung M, Kupper W, Lohman M, Reime B, and Ventura R 1998 Intravenous coronary angiography with ... 8 Ohtsuka S, Sugishita Y, Takeda T, Itai Y, Tada J, and Hyodo K, 1999 Dynamic intravenous coronary angiography using 2D ... 11 Thomlinson W 1995 Transvenous Coronary Angiography in Humans Biomedical Applications of Synchrotron Radiation (E Burattini ...
An imaging test called coronary computed tomography angiography, or coronary CTA, may be preferred over coronary angiography to ... Coronary Angiography Coronary angiography is a procedure that uses contrast dye, usually containing iodine, and x ray pictures ... After coronary angiography, your doctor will remove the catheter, possibly use a closure device to close the blood vessel, and ... Often, coronary angiography is done with a cardiac catheterization procedure. For this, your doctor will clean and numb an area ...
... compared favorably with conventional angiography in predicting probable coronary disease -- but its accuracy varied widely ... CT coronary angiography (CTCA) compared favorably with conventional angiography in predicting probable coronary disease -- but ... stenosis by conventional coronary angiography.. As compared with conventional angiography, CTCA had a PPV of 91.6% and NPV of ... Source Reference: Diamond GA, Kaul S "Gone fishing! On the real-world accuracy of computed tomography coronary angiography" ...
Coronary Computed Tomographic Angiography: A Rapid Alternative to Usual Care. Coronary computed tomographic (CT) angiography ( ... Coronary artery disease detected by coronary CT angiography is associated with intensification of preventive medical therapy ... Coronary computed tomographic angiography (CTA) demonstrating nonobstructive coronary artery disease. Top row, Three- ... Prognostic value of nonobstructive and obstructive coronary artery disease detected by coronary computed tomography angiography ...
... , CT Coronary Angiogram, CT Angiography of Coronary Vessels, Coronary CT Angiogram, CCTA, Computed ... Tomographic Angiography of Coronary Arteries, CT Angiography of Coronary Arteries. ... Coronary CT Angiography. Aka: Coronary CT Angiography, CT Coronary Angiogram, CT Angiography of Coronary Vessels, Coronary CT ... Coronary CT Angiography (CCTA) Image quality compared with Angiography. *Standard angiography (gold standard). *Temporal ...
118 Repeat Coronary Angiography in Patients with Previously Normal Coronary Arteries Vitaliy Androshchuk, Majd Protty, Phillip ... 28 Complication rate of coronary angiography in patients with prior coronary artery bypass grafting Perin Celebi, Mohamad Fahed ... 133 Although CT Coronary Angiography in the West of Scotland is Used in a Higher Risk Population than Recommended by Nice, The ... Coronary angiography in worsening heart failure: determinants, findings and prognostic implications João Pedro Ferreira, ...
... is a noninvasive method to image the coronary arteries. Applications include the following: Diagnosis of coronary artery ... Gorenoi V, Schönermark MP, Hagen A. CT coronary angiography vs. invasive coronary angiography in CHD. GMS Health Technol Assess ... Coronary CT Angiography Q&A What are the applications of coronary computed tomography angiography (CCTA)?. Updated: Dec 21, ... Assessment by Coronary Computed Tomographic Angiography of Individuals Undergoing Invasive Coronary Angiography) trial. J Am ...
Gorenoi V, Schönermark MP, Hagen A. CT coronary angiography vs. invasive coronary angiography in CHD. GMS Health Technol Assess ... Coronary CT Angiography Q&A How are patients prepared for coronary computed tomography angiography (CCTA)?. Updated: Dec 21, ... Assessment by Coronary Computed Tomographic Angiography of Individuals Undergoing Invasive Coronary Angiography) trial. J Am ... Next generation coronary CT angiography: in vitro evaluation of 27 coronary stents. Eur Radiol. 2014 Nov. 24(11):2953-61. [ ...
Intravascular Contrast-Enhanced Coronary MR Angiography: Relationship Between Coronary Artery Delineation and Blood T1, J. ... Evaluation of 3D Magnetic Resonance Coronary Angiography with Clariscan in Humans: Correlation with X-Ray Angiography, R.M. ... Coronary MR Angiography. Hall C. Thursday: 13:30 15:30. 1624. A Computationally Efficient Algorithm for Accurate Detection of ... Spiral Coronary Angiography Using the Intravascular Contrast Agent NC100150 Injection, E.M. Pedersen, M. Pedersen, J. Rickers, ...
Left heart cath or Coronary angiography only?. By rap55 in forum Cardiology ... Left heart catheterization with coronary angiography, left ventriculography, angioplasty, carotid arch and four vessels, ... LT Heart Cat and Coronary LT Angiography. By Trendale in forum Cardiology ... L heart cath w/ r coronary angio???. By sholland1 in forum Cardiology ...
  • Diagnostic cardiac catheterization and coronary angiography are considered the gold standard in the assessment of the anatomy and physiology of the heart and its associated vasculature. (mhmedical.com)
  • Coronary angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the arteries in your heart. (medlineplus.gov)
  • But the procedure is very expensive (one 1995 analysis priced angiography at $5,500 per procedure). (encyclopedia.com)
  • Other studies reveal that physicians are not as likely to recommend angiography for their female patients, even when they exhibit the same symptoms as male patients who receive the procedure. (encyclopedia.com)
  • Coronary angiography is a procedure that uses contrast dye, usually containing iodine, and x ray pictures to detect blockages in the coronary arteries that are caused by plaque buildup. (nih.gov)
  • Coronary angiography is a common procedure that rarely causes serious problems. (nih.gov)
  • traditional procedure called coronary angiography . (everydayhealth.com)
  • In 10 chapters the authors focus on subjects such as the technique of selective coronary angiography, anatomy of the normal and abnormal coronary artery tree, congenital anomalies of the coronary vessels, as well as indications, contraindications, complications, and side effects of the procedure. (annals.org)
  • A coronary angiography is a fairly common procedure. (zocdoc.com)
  • Learn percutaneous coronary intervention advantages and disadvantage and view an animation of the procedure. (films.com)
  • Invasive, catheter-based coronary angiography is the clinical standard tool for assessment of the coronary arteries, but it has several shortcomings: First of all, it is an invasive procedure and, as such, is associated with a certain morbidity and mortality, which in most cases is a consequence of the required arterial access. (appliedradiology.com)
  • This volume contains a literature review of coronary angiography, a comprehensive set of indications for performing this procedure, ratings of the appropriateness for each indication, and a medical record abstraction form and guidelines for its use. (worldcat.org)
  • By gaining a better understanding of angiography, we are better able to reduce contrast load per case, reduce radiation exposure times, and reduce procedure times. (cathlabdigest.com)
  • Coronary angiography is now, arguably, the last invasive procedure to be performed with primarily diagnostic intent on this scale. (bjcardio.co.uk)
  • you'll probably have to undergo coronary angiography , in which. (everydayhealth.com)
  • ROCHESTER, Minn. -- Mayo Clinic researchers discovered it is safe -- and much more convenient and less costly -- for many patients to undergo coronary angiography and elective valve surgery on the same day, it is reported in the current issue of Mayo Clinic Proceedings. (eurekalert.org)
  • When patients had positive result in either study, they will undergo coronary angiography for confirmation. (clinicaltrials.gov)
  • A new study presented at the EuroPCR 2013 reveals that measuring fractional flow reserve (FFR) with the help of pressure wire assessment during coronary angiography for diagnosis of chest pain can provide significant changes in the management of almost quarter of the patients. (medindia.net)
  • The RIPCORD (Does routine pressure wire assessment influence management strategy at coronary angiography for diagnosis of chest pain) study was designed to assess whether routine assessment of FFR in all the main coronary branches would significantly change the management strategy derived from diagnostic angiography alone. (medindia.net)
  • 23 May 2013, Paris, France: Routinely measuring fractional flow reserve (FFR) using pressure wire assessment during coronary angiography for diagnosis of chest pain leads to significant changes in the management of one in four patients, according to results from a study reported at EuroPCR 2013. (bio-medicine.org)
  • In any event, the American College of Cardiology (ACC) and the American Heart Association (AHA) have joined to create specifications on how angiography should be used. (encyclopedia.com)
  • A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee on Coronary Angiography). (springer.com)
  • The American College of Cardiology (ACC) and the American Heart Association (AHA) have updated their guidelines for coronary angiography. (aafp.org)
  • I am a resident of cardiology and want to know a special knowledge about coronary angiography and report of it.Would you please help me? (discoveriesinmedicine.com)
  • This is mainly caused by the blooming effect of calcified lesions in combination with the still too limited spatial resolution of CTCA as compared with invasive coronary angiography. (bmj.com)
  • The program addresses the fundamental concerns associated with conventional angiography, which requires the injection of a contrast agent directely into the coronary arteries by the mean of arterial cathetherization. (esrf.eu)
  • The x-ray energies and intensity are those required for the dual-energy digital subtraction technique to enhance the image contrast of the coronary arteries following venous injection of an iodinated contrast agent. (esrf.eu)
  • The dilution of the contrast agent prior to arrival in the coronary arteries, the background in the ventricles and the pulmonary veins, and the motion of the heart all present problems which are effectively solved by this technique. (esrf.eu)
  • Contrast-media induced nephropathy in patients undergoing coronary angiography. (nih.gov)
  • The heart was cooled, and contrast medium (CM) consisting of distilled water heated to 40 °C was injected in a coronary vessel, while thermal images were captured. (springer.com)
  • To make it possible to do angiography and surgery on the same day and largely diminish the possibility of renal failure, Mayo physicians use other contrast agents. (eurekalert.org)
  • The programme addresses the fundamental concerns associated with conventional angiography, which requires the injection of a contrast agent directly into the coronary arteries by means of arterial catheterisation. (esrf.eu)
  • Following CT angiography all patients will have a repeat measurement of serum creatinine to screen for contrast induced nephropathy. (clinicaltrials.gov)
  • Furthermore, its cross-sectional nature permits visualization not only of the contrast-enhanced coronary artery lumen, but also of the vessel wall (if image quality is adequate). (appliedradiology.com)
  • Patients undergoing a Coronary CTA scan receive an iodine-containing contrast dye as an intravenous solution to ensure the best images possible. (bumrungrad.com)
  • During the commissioning phase of the ESRF angiography program, the opportunity presented itself to image adult pigs in vivo with Gd contrast agent. (spie.org)
  • So HR, gender, TCD and weight can be used to adjust flow rate and dosage of contrast media before administration of contrast media during coronary CT angiography. (biomedsearch.com)
  • A set of mask images of a coronary region is received, and a sequence of contrast images for the coronary region is received. (google.com)
  • The estimated background layer is subtracted from the contrast image to extract a coronary vessel layer for the contrast image. (google.com)
  • The article focuses on the randomized controlled trial (RCT) investigating if prophylactic hemodialysis after coronary angiography prevents contrast-induced nephropathy (CIN) in patients with advanced renal failure. (ebscohost.com)
  • Trimetazidine in the prevention of contrast-induced nephropathy after coronary procedures. (ebscohost.com)
  • Contrast angiography is a standard method for the detection of RAS that is readily performed in combination with coronary angiography [ 8 ]. (pubmedcentralcanada.ca)
  • After coronary angiography, your doctor will remove the catheter, possibly use a closure device to close the blood vessel, and close and bandage the opening on your arm, groin, or neck. (nih.gov)
  • The overall accuracy of coronary CTA depended on the vessel. (appliedradiology.com)
  • Furthermore, the optimal gating window position is depending on the coronary vessel segment. (spie.org)
  • In addition to reviewing the previous guidelines, the 12-member ACC/AHA Committee on Coronary Angiography also conducted a search of the pertinent literature for the previous 10 years. (aafp.org)
  • Interventional X-ray coronary angiography is a primary tool to guide catheter-based coronary interventions. (springer.com)
  • For smooth and safe conduct of coronary interventions, mastery of all steps of image acquisition and interpretation is mandatory. (springer.com)
  • Cardiologists, or doctors who specialize in the heart, will perform coronary angiography in a hospital or specialized laboratory. (nih.gov)
  • In patients with newly diagnosed cardiomyopathy it is the standard of care to perform coronary angiography. (clinicaltrials.gov)
  • Visualization techniques in computed tomographic coronary angiography. (medscape.com)
  • One of the primary programs is the development of dual-energy transvenous coronary angiography for in vivo human research protocols. (spie.org)
  • QCA(quantitative coronary angiography) guided BVS implantation and all patients are treated with dual antiplatelet therapy (aspirin 100mg/day and clopidogrel 75mg per day[or ticagrelor 90mg po bid]) for 12 months after BVS implantation, and randomized to either aspirin alone (aspirin 100mg/day) or clopidogrel alone (clopidogrel 75mg /day) for the next 4 years. (clinicaltrials.gov)
  • Quantitative Coronary Angiography (QCA) was chosen to define %DS in a repetitive manner. (termedia.pl)
  • He suggested that RIPCORD has provided proof of principle and that a large-scale randomised trial comparing angiographic- with FFR-guided assessment and management of patients with stable angina undergoing diagnostic angiography is now warranted. (medindia.net)
  • Commenting on the implications of the study findings, Kari Niemela, Medical Director and founder of the Heart Center Co., Tampere University Hospital, Tampere, Finland, said, "The RIPCORD trial demonstrated that routine measurement of FFR in patients with stable angina pectoris changes treatment plan in one out of four patients as compared to visual evaluation with coronary angiography alone. (medindia.net)
  • 1998) are promising, but despite an active research in these domains, the conventional coronary angiography remains the gold standard technique. (esrf.eu)
  • Point out that in this study across four centers attempting a real-world evaluation, CTCA appeared to have good accuracy when compared with conventional angiography. (medpagetoday.com)
  • The popularity of CTCA as a less invasive alternative to conventional angiography has grown rapidly in recent years. (medpagetoday.com)
  • In an effort to help clarify the potential diagnostic role of CTCA in "real-world" practice, investigators at four Canadian centers participated in a multivendor field evaluation of 64-slice CTCA and comparison with conventional coronary angiography. (medpagetoday.com)
  • As compared with conventional angiography, CTCA had a PPV of 91.6% and NPV of 84.7%, in addition to the 81.3% sensitivity and 93.3% specificity. (medpagetoday.com)
  • The history, technic, and complications of coronary angiography have been discussed. (ahajournals.org)
  • It poses some risk for complications, e.g. dissection, because the catheter has to be inserted into an artery from a patient's groin or arm or wrist to be carefully threaded to coronary arteries. (bumrungrad.com)