心脏电交替是一种少见的心电图表现,其中单纯性 P 波电交替更属罕见。我们曾发现一例阵发性室上性心动过速(以下简称阵发室上速)伴有全部 P—QRS—T 电交替,转复后又出现单纯性 P 波电交替,报告如下。张×,女,52岁。有发作性心动过速史3 Cardiac alternans is a rare manifestation of electrocardiogram in which simpler P-wave alternation is even more rare. We have found that one case of paroxysmal supraventricular tachycardia (hereinafter referred to as paroxysmal supraventricular tachycardia) accompanied by all the P-QRS-T alternation, after the conversion appeared simple P-wave alternation, the report is as follows. Zhang ×, female, 52 years old. Have a history of episodes of tachycardia 3