منابع مشابه
Resistance over compliance describes right ventricular afterload better than resistance-compliance time: a friendly amendment
In their paper on combined preand post-capillary pulmonary hypertension, Assad et al. say that ‘‘the resistance-compliance (RC) time has emerged as a measure of pulmonary vascular physiology that integrates the mean and pulsatile afterload of the right ventricle.’’ They discuss reports in the literature of changes in RC time in a variety of conditions. The findings in their study show that ‘‘th...
متن کاملEffect of aging and physical activity on left ventricular compliance.
BACKGROUND Left ventricular compliance appears to decrease with aging, which may contribute to the high incidence of heart failure in the elderly. However, whether this change is an inevitable consequence of senescence or rather secondary to reduced physical activity is unknown. METHODS AND RESULTS Twelve healthy sedentary seniors (69.8+/-3 years old; 6 women, 6 men) and 12 Masters athletes (...
متن کاملEarly increase in left ventricular compliance after myocardial infarction.
The left ventricular (LV) pressure-volume (P-V) relationship is a resultant of several determinants, including initial ventricular volume, geometry, and wall stiffness. A quantitative index of one of these determinants, LV wall stiffness, was developed from a mathematical analysis of the isolated P-V relationship. Since this relationship was exponential, stiffness (dP/dV) could be expressed by ...
متن کاملLeft ventricular hypertrophy induced by reduced aortic compliance.
AIM It was the aim of this study to investigate the long- term effects of reduced aortic compliance on cardiovascular hemodynamics and cardiac remodeling. METHOD Sixteen swine, divided into 2 groups, a control and a banding group, were instrumented for pressure and flow measurement in the ascending aorta. Teflon prosthesis was wrapped around the aortic arch in order to limit wall compliance i...
متن کاملThe coronary pressure-flow determinants left ventricular compliance in dogs.
Displacement of the left ventricular diastolic pressure-dimension relationship (change in compliance) has been observed with alterations in coronary perfusion pressure. The relative contribution of coronary (myocardial) blood flow, as compared with the perfusion pressure at which flow occurs, was studied in 10 dogs during diastolic relaxation potassium arrest during cardiopulmonary bypass. The ...
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ژورنال
عنوان ژورنال: Circulation
سال: 1978
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.57.6.1234