نتایج جستجو برای: myocardial contraction
تعداد نتایج: 210304 فیلتر نتایج به سال:
BACKGROUND Obesity and diabetes mellitus are independently associated with the development of heart failure. In this study, we determined the respective effects of obesity, insulin resistance, and diabetes mellitus on the intrinsic contraction and mitochondrial function of the human myocardium before the onset of cardiomyopathy. METHODS AND RESULTS Right atrial myocardium was obtained from 14...
background: heart disease is the main cause of mortality and morbidity in patients with beta thalassemia, rendering its early diagnosis vital. we studied and compared echocardiographic findings in patients with beta thalassemia major, patients with beta thalassemia intermedia, and a control group. methods: eighty asymptomatic patients with thalassemia major and 22 asymptomatic cases with thalas...
SINCE Bowditch's classic description of the effect of stimulation frequency on the force of contraction of the frog ventricle,' the relations between contractile force and heart rate have been studied in many animal species.2 7 Indeed, Kruta8 has suggested that "the basic mechanism of inotropic effects of all changes of frequency (or even of one single interval) exists in all vertebrate myocard...
Echocardiography was used to study left ventricular size and contraction in 90 patients with isolated mitral valve disease 47 patients with mitral stenosis, 26 with mixed mitral valve disease and 89 with mitral regurgitation. Left ventricular measurements included the end-diastolic internal dimension (LVIDd), mural thickness (PWTd), an index of circumferential myocardial contraction fractional ...
Objectives In order to provide a pharmacological profile for some newly synthesized dihydropyridines, we investigated their effects on the isolated rat colon segments and the isolated rat atrium contractility. The tested compounds include alkyl ester analogues of nifedipine, in which the ortho-nitrophenyl group at position 4 is replaced by 2-alkylthio-1-benzyl-5-imidazolyl substituent, and nif...
Echocardiography was used to study left ventricular size and contraction in 90 patients with isolated mitral valve disease 47 patients with mitral stenosis, 26 with mixed mitral valve disease and 89 with mitral regurgitation. Left ventricular measurements included the end-diastolic internal dimension (LVIDd), mural thickness (PWTd), an index of circumferential myocardial contraction fractional ...
We have previously described a subpopulation of patients with septic shock who had a reversible depression of radionuclidedetermined left ventricular ejection fraction (EF). To investigate the mechanism of this myocardial depression, an in vitro model of mammalian myocardial cell performance was established employing primary spontaneously beating rat myocardial cells. The contraction of a singl...
We have previously described a subpopulation of patients with septic shock who had a reversible depression of radionuclide-determined left ventricular ejection fraction (EF). To investigate the mechanism of this myocardial depression, an in vitro model of mammalian myocardial cell performance was established employing primary spontaneously beating rat myocardial cells. The contraction of a sing...
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