慢性高输出量型心功能不全发展过程中心室舒、缩功能和顺应性的变化及其与心泵功能的关系

本文研究了大鼠慢性高输出量型心功能不全发展过程中心室舒,缩功能和顺应性的变化规律及其与心泵功能的关系。疾病模型采用动静脉造瘘(ACF)加单侧肾动脉缩窄(RAS)的方法建立。本实验中,全部ACF+RAS大鼠均呈现出慢性高输出量型心功能不全的特征,在静息状态下心脏指数(CI)显著升高,而心泵贮备功能(CORF)却不同程度地降低。结果表明:随心泵功能的恶化,心室的舒、缩功能进行性降低,心室的舒张顺应性显著升高,心室的舒,缩性能和顺应性在心功能不全发展的不同阶段对心泵功能所起的作用不同。

Changes of ventricular relaxation, contractility and compliance and their effects on cardiac pump function during the development of chronic high output heart failure

Changes of ventricular relaxation, contractility and compliance and their effects on cardiac pump function during the development of chronic high output heart failure were studied in the animal model produced by establishment of combined aorto-caval fistula (ACF) and unilateral renal artery stenosis (RAS) in rats.In the present study, all the rats with ACF+RAS showed the characteristics of high output hear failure of varying degree, the cardiac index rised significantly even at rest, while pump function reserving force (CORF) decreased to different extent.The resu(?)lts show that with the aggravation of cardiac pump function deterioration, ventricular relaxation and contractility decreased progressively, the ventricular diastolic compliance rised significantly. With stepwise regression analysis, the changes of ventricular relaxation, comtractility and compliance have different effects on cardiac pump function at different stage of heart failure.