Preload, afterload, volume loading, pressure loading.
نویسندگان
چکیده
منابع مشابه
Dynamic arterial elastance to predict arterial pressure response to volume loading in preload-dependent patients
INTRODUCTION Hemodynamic resuscitation should be aimed at achieving not only adequate cardiac output but also sufficient mean arterial pressure (MAP) to guarantee adequate tissue perfusion pressure. Since the arterial pressure response to volume expansion (VE) depends on arterial tone, knowing whether a patient is preload-dependent provides only a partial solution to the problem. The objective ...
متن کاملEffects of Chronic Right Ventricular Volume and Pressure Loading
The effects of chronic right ventricular (RV) distension on left ventricular (LV) funiction were assessed in dogs 3 weeks after pressure and volume loading of the RV lhad been produced by the emplacement of a constricting band around the pulmonary artery and the creation of tricuspid insufficiency. This resulted in ascites, RV hypertrophy and dilatation, an increase in RV end-diastolic pressure...
متن کاملAfterload Mismatch and Preload Reserve
We examined the interrelationship of afterload, preload and left ventricular (LV) performance at two levels of systolic loading in 20 patients with chronic aortic regurgitation to determine if the concept of afterload mismatch and preload reserve can be applied to this clinical entity. We identified two groups of patients at different stages in the natural history of volume overload. Patients i...
متن کاملLoad dependency of end-systolic pressure-volume relations in isolated, ejecting canine hearts.
If characteristic muscle properties such as myocardial viscosity and/or shortening deactivation influence left ventricular ejection in the whole heart, the slope of the left ventricular end-systolic pressure-volume relation should be a function of both the contractile state and the loading mode. Thus, the load dependence of the end-systolic pressure-volume relation was examined using isolated, ...
متن کاملDifferential cardiac remodeling in preload versus afterload.
BACKGROUND Hemodynamic load regulates myocardial function and gene expression. We tested the hypothesis that afterload and preload, despite similar average load, result in different phenotypes. METHODS AND RESULTS Afterload and preload were compared in mice with transverse aortic constriction (TAC) and aortocaval shunt (shunt). Compared with sham mice, 6 hours after surgery, systolic wall str...
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ژورنال
عنوان ژورنال: Circulation
سال: 1977
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circ.56.3.884807