室性心律失常在心衰中十分常见,是心衰患者心性猝死的主要危险因素。文献报道,心衰时成对或多形性室性早搏发生率为71%～95%,非持续性心动过速为28%～80%。心泵功能失调的临床和实验室指标,如紫绀及肺瘀血程度,左室射血分数,左室大小及运动时间(exercise time)、以及神经内分泌和生化反应的紊乱的参数如血浆去甲肾上腺素及肾素水平、低血钠、低血钾等均是心性猝死的重要预测指标。Framingham研究显示,此类病人1年和5年存活率,男性为79%和38%;女性为86%和57%。心衰中因心律失常病死率超过40%,尤其是室性心律失常的严重程度 Ventricular arrhythmia is very common in heart failure, is the main risk factor for sudden cardiac death in patients with heart failure. Reported in the literature, heart failure, paired or pleomorphic premature ventricular contractions incidence of 71% to 95%, non-sustained tachycardia was 28% to 80%. Cardiac pump dysfunction in clinical and laboratory parameters such as cyanosis and lung blood stasis, left ventricular ejection fraction, left ventricular size and exercise time (exercise time), and neuroendocrine and biochemical reaction disorders parameters such as plasma to a Adrenaline and renin levels, hyponatremia, hypokalemia are important predictors of sudden cardiac death. The Framingham study showed one-year and five-year survival rates for such patients, 79% and 38% for males and 86% and 57% for females. Heart failure due to arrhythmia mortality more than 40%, especially the severity of ventricular arrhythmias