一、血管扩张剂治疗心力衰竭的机理心力衰竭的症状是一系列循环系统充血和低心排出量的综合表现。心脏的泵功能正常时,心室的搏出量随心室充盈压升高而增加,二者的关系显现一条 Starling 曲线,心力衰竭时这条曲线下降、低平。心室充盈压增高,不会使心室搏出量有显著增加(图1)。心脏的 First, the mechanism of vasodilator treatment of heart failure The symptoms of heart failure is a comprehensive series of circulatory system congestion and low cardiac output. Cardiac pump function is normal, the ventricular stroke volume increases with ventricular filling pressure increases, the relationship between the two shows a Starling curve, heart failure, this curve down, low flat. Ventricular filling pressure increased, will not make a significant increase in ventricular stroke volume (Figure 1). of heart