抗心律失常的钠通道阻滞剂对传导延缓的病变心肌具有优先作用,并使慢传导组织进一步延长传导时间从而减慢心动过速。在持续性室速患者中,应用信号平均心图可检测到来自传导缓慢的心室肌的晚电位。本研究检验下述假设,即钠通道阻滞剂选择性延长晚电位即信号平均QRS波终末部的低振幅信号,以及晚电位的延长可能与室性心动过速的减慢有关。 Anti-arrhythmic sodium channel blockers have a preferential role in the conduction delay of diseased myocardium and slow the conduction of tissue by slow conduction to slow down the tachycardia. In patients with persistent VT, the late potentials from slow-acting ventricular muscles can be detected using the signal-averaged heart map. This study examined the hypothesis that sodium channel blockers selectively prolong the late potentials, ie, the low-amplitude signals at the terminal of the signal-averaged QRS wave, and the prolongation of the late potentials may be related to the slowing down of ventricular tachycardia.