QRS波时限延长在心力衰竭(简称心衰)患者中较常见。自然状态下,QRS波时限延长与心功能不全密切相关,往往QRS波时限越长纽约心脏病协会心功能分级越高,左室射血分数越低,起搏状态下亦是如此;QRS波时限延长在终末期心衰患者心脏再同步化治疗中具有重要的作用;QRS波时限进行性延长与心功能不全也密切相关。 The prolongation of QRS wave duration is more common in patients with heart failure (HF). Under natural conditions, prolongation of QRS wave length is closely related to cardiac insufficiency, and the longer the QRS wave duration, the higher the New York Heart Association class of cardiac function, the lower the left ventricular ejection fraction and the pacing state. The QRS wave duration Prolongation in cardiac resynchronization therapy in patients with end-stage heart failure plays an important role; prolonged QRS wave duration and heart failure are also closely related.