نتایج جستجو برای: left ventricular myocardium
تعداد نتایج: 381729 فیلتر نتایج به سال:
SUMMARY The findings at coronary angiography and left ventricular cineangiography were compared with clinical data in 52 cases of coronary artery disease. A semiquantitative estimation of left ventricular end-diastolic and end-systolic volumes was used, as well as the identification of local dysfunction in the left ventricular wall. The findings at ventriculography had no relation to the functi...
BACKGROUND Gap junctions are a determinant of myocardial conduction. Disturbances of gap-junctional content may account for abnormalities of impulse propagation, contributing to the arrhythmic tendency and mechanical inefficiency of ischemic and hypertrophied myocardium. The aim of this study was to characterize gap junction organization in normal human ventricular myocardium and to establish w...
We studied left ventricular minor and major axis diameters and equatorial wall thickness in eleven conscious dogs with chronically implanted pulse-transit ultrasonic dimension transducers. Left ventricular transmural pressure was measured with micromanometers. Left ventricular volume was varied by inflation of implanted vena caval or aortic occluders. The geometry of the left ventricle was repr...
To determine whether the hypertrophic response of the surviving myocardium after infarction leads to normalization of ventricular hemodynamics and wall stress, the left coronary artery was ligated in rats. One month later, the rats were killed. In infarcts affecting an average 38% of the free wall of the left ventricle (small infarcts), reactive hypertrophy in the spared myocardium bordering an...
We describe the electrical manifestations of dead left septal, left and right parietal myocardium and those of biventricular location, reviewing the electrocardiographic signs of the isolated left and right peripheral blocks. We also describe the electrical manifestations of dead myocardium accompanied by a left anterior subdivision block (LASB) and a left posterior subdivision block (LPSB). Th...
background: exercise and rehabilitation are important methods for decreasing the risk factors of coronary artery disease (cad). we aimed to evaluate the effect of the cardiac rehabilitation (cr) exercise program on the cardiac structure and physiology in patients undergoing percutaneous coronary intervention (pci). methods: in this randomized controlled study, 146 patients with cad were divided...
OBJECTIVES A nationwide survey was conducted to clarify the clinical features of isolated noncompaction of the ventricular myocardium (INVM) in Japanese children in comparison with features previously described in patients with INVM. BACKGROUND Isolated noncompaction of the ventricular myocardium is a rare disorder characterized by an excessively prominent trabecular meshwork. It is accompani...
Relations between movement of the atrioventricular ring and changes in left atrial and ventricular dimensions were studied by echocardiography and compared with apexcardiography and Doppler mitral flow velocity traces in 20 healthy controls and in patients with left ventricular hypertrophy (n = 28) or dilatation (n = 16). During left ventricular systole the atrioventricular ring, a structure co...
To determine the effects of myocardial infarction-induced left ventricular failure on the regulation of surface alpha-1 adrenoreceptors and signal transduction, large infarcts were produced in rats and the animals killed seven days later. After the documentation of impaired left ventricular pump performance, radioligand binding studies of the alpha-1 adrenoreceptor, norepinephrine-stimulated ph...
BACKGROUND Right ventricular dysplasia is a heart muscle disease of unknown cause that is often familial and is anatomically characterised by adipose or fibroadipose infiltration of the right ventricular myocardium. It is generally regarded as a selective disorder of the right ventricle. AIM To investigate the prevalence and characteristics of left ventricular involvement in two families in w...
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