An 82-year-old man with ischemic cardiomyopathy, heart failure with reduced ejection fraction and Medtronic biventricular ICD presented with shortness of breath. His ECG is presented with shortness of breath. ECG shows atrial sensed, electronic ventricular pacing. At the end of each QRS complex there is another pacemaker stimulus. This represents typical case of cardiac contractility modulation therapy and not pacemaker malfunction,

中文翻译：

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QRS波群末端的电子心室起搏：是否异常？

一名 82 岁男性患有缺血性心肌病、射血分数降低的心力衰竭和美敦力双心室 ICD，出现呼吸短促。他的心电图显示呼吸急促。心电图显示心房感应的电子心室起搏。在每个 QRS 波群的末尾，还有另一个起搏器刺激。这代表了心肌收缩力调节治疗的典型案例，而不是起搏器故障，