Kremers M S, Levine B, Spielberger R, Passos-Coelho J
Department of Internal Medicine, University of Texas, Southwestern Medical Center, Dallas 75235.
Pacing Clin Electrophysiol. 1989 Oct;12(10):1660-6. doi: 10.1111/j.1540-8159.1989.tb01845.x.
Entrainment of ventricular tachycardia (VT) may be manifest as fixed and progressive QRS fusion with ventricular and, rarely, atrial pacing. Only a single example of spontaneous VT entrainment by another rhythm, rapid atrioventricular nodal tachycardia, has been reported. This article describes an example of fixed and progressive QRS fusion between conducted sinus rhythm and VT consistent with entrainment. In contrast to entrainment with pacing, entrainment of VT by sinus rhythm occurred with drug-mediated arrhythmia slowing and demonstrated progressive QRS fusion at a constant cycle length. However, it did not demonstrate unfused but entrained QRS complexes. The resulting short PR interval and wide QRS mimicked a preexcited rhythm.
室性心动过速（VT）的拖带可能表现为与心室起搏相关的固定性和进行性QRS波融合，很少与心房起搏相关。仅报道过1例由另一种节律（快速房室结性心动过速）自发拖带室性心动过速的病例。本文描述了1例传导性窦性心律与室性心动过速之间固定性和进行性QRS波融合的病例，符合拖带的表现。与起搏拖带不同，窦性心律对室性心动过速的拖带发生于药物介导的心律失常减慢时，并在恒定周期长度下表现为进行性QRS波融合。然而，它并未表现出未融合但被拖带的QRS波群。由此产生的短PR间期和宽QRS波类似预激节律。
