心功能不全与心律失常密切相关。某些心律失常由于其对血流动力学的影响可加重心功能不全和心肌缺血,进一步降低心肌收缩力,使心脏传导延缓,甚至可致心源性猝死。反之,心功能不全也可引发或加重心律失常。在判断预后方面,室性心律失常往往不如左室泵功能受损程度重要,但无症状性复 Cardiac insufficiency and arrhythmia are closely related. Some of the arrhythmia due to its hemodynamic effects can increase cardiac insufficiency and myocardial ischemia, further reduce myocardial contractility, delayed cardiac conduction, and even cause sudden cardiac death. Conversely, cardiac insufficiency can also cause or worsen arrhythmias. In determining the prognosis, ventricular arrhythmias are often not as important as the degree of impairment of LV function, but asymptomatic