Tekur Venkatesh
Department of Cardiology, Apollo Hospitals, Bangalore 560076, India.
J Cardiovasc Dis Res. 2013 Dec;4(4):242-4. doi: 10.1016/j.jcdr.2014.01.007. Epub 2014 Mar 4.
Many types of cardiac arrhythmias have been noted following acute myocardial infarction. Polymorphic ventricular arrhythmias (polymorphic ventricular tachycardia and ventricular fibrillation) related to an acute myocardial infarction generally strike during the hyperacute phase, are clearly related to ischaemia and are not associated with a long QT interval time. Pause-dependent Torsade de pointes has been reported following acute myocardial infarction and this arrhythmia generally occurs 3-11 days after the onset of acute myocardial infarction and none has been reported during the hyperacute phase. Torsade de pointes - a specific ventricular tachycardia with specific characteristics has been described in hypokalemia, hypomagnesaemia, during Quinidine therapy, and while using phenothiazines and tricyclic antidepressants. It is reported following liquid protein diet, brady-arrhythmias [especially III° AV Block], sick-sinus syndromes. Torsade de pointes either pause-dependent or pause-independent occurring directly as a reperfusion arrhythmia during intravenous thrombolytic therapy has not been reported in the literature to the best of the authors knowledge. Here, an episode of Torsade de pointes as a direct consequence of reperfusion following thrombolytic therapy in a patient of acute myocardial infarction is described.
急性心肌梗死后已发现多种类型的心律失常。与急性心肌梗死相关的多形性室性心律失常(多形性室性心动过速和心室颤动)通常在超急性期发作,与缺血明显相关,且与QT间期延长无关。急性心肌梗死后曾报告过间歇依赖性尖端扭转型室速,这种心律失常一般在急性心肌梗死发病后3 - 11天出现,超急性期尚未见报告。尖端扭转型室速是一种具有特定特征的特殊室性心动过速,已在低钾血症、低镁血症、奎尼丁治疗期间以及使用吩噻嗪类和三环类抗抑郁药时被描述过。据报道,在食用流质蛋白饮食、缓慢性心律失常[尤其是三度房室传导阻滞]、病态窦房结综合征后也会出现。就作者所知,文献中尚未报道过在静脉溶栓治疗期间直接作为再灌注心律失常出现的间歇依赖性或非间歇依赖性尖端扭转型室速。在此,描述了1例急性心肌梗死患者在溶栓治疗后因再灌注直接导致尖端扭转型室速发作的病例。