维司力农是一种新的口服有效的正性肌力药物。实验证明，本品能增加心肌收缩力，而对心率或心肌耗氧量影响不大。本文旨在研究本品是否能降低有症状心力衰竭病人的发病率和病死率，以及是否能改善这些病人的生活质量。本研究为随机、双盲、多中心、安慰剂对照试验。研究对象为 Vernilone is a new orally active inotropic agent. Experiments show that this product can increase myocardial contractility, but little effect on heart rate or myocardial oxygen consumption. This article aims to investigate whether this product can reduce morbidity and mortality in symptomatic patients with heart failure, and whether they can improve the quality of life of these patients. This study was a randomized, double-blind, multicenter, placebo-controlled trial. The research object is