室性心动过速(以下简称室速)可分为规律型及不规律型两类。前者包括经典的阵发性期外收缩性室速、并行心律性室速及自搏心律性室速(加速性室性自搏心律);不规律型室速则包括快慢交替型室速、扭转型室速及其它。可以认为扭转型室速是介于期外收缩性室速与心室纤颤之间的一种类型。Mac Wieciaxus 氏在1923年及Wiggers 在1929年就观察到这种心律紊乱,称之为假性室颤1949～ Ventricular tachycardia (hereinafter referred to as VT) can be divided into two types of regular and irregular type. The former includes the classic paroxysmal extrasystolic ventricular tachycardia, paroxysmal rhythm of ventricular tachycardia and pacemaker ventricular tachycardia (tachycardia); irregular ventricular tachycardia, including the rate of alternating ventricular tachycardia, reverse VT and others. It can be considered that torsades de pointes is a type between the extrasystolic ventricular tachycardia and ventricular fibrillation. This disorder was observed by Mac Wieciaxus in 1923 and Wiggers in 1929 and was called pseudo-ventricular fibrillation 1949 ~