Evans T R, Curry P V, Fitchett D H, Krikler D M
J Electrocardiol. 1976;9(3):255-8. doi: 10.1016/s0022-0736(76)80053-2.
Four cases are described in which electrical stimulation of the right ventricle produced the ventricular arrhythmia known as "torsade de pointes". This arrhythmia has previously been described as classically occurring in the context of the chronic bradycardias, particularly when there is also hypokalemia and a long QT interval, being most frequently initiated by a ventricular extrasystole occurring relatively late during ventricular repolarization. One patient had suffered a recent anterior myocardial infarction and developed the arrhythmia during rapid pacing for atrial flutter, when the electrode catheter had inadvertently entered the right ventricle. In the other three patients the arrhythmia was produced during the ventricular extrastimulus test performed during routine diagnostic electrophysiological investigation.
本文描述了4例通过电刺激右心室产生名为“尖端扭转型室性心动过速”的室性心律失常的病例。此前曾描述这种心律失常典型地发生在慢性心动过缓的情况下，尤其是当同时存在低钾血症和QT间期延长时，最常由心室复极相对晚期出现的室性期前收缩引发。1例患者近期发生前壁心肌梗死，在为心房扑动进行快速起搏时，电极导管意外进入右心室，从而发生了心律失常。在另外3例患者中，心律失常是在常规诊断性电生理检查期间进行的心室额外刺激试验中诱发的。
