摘要
<正>A 67-year-old man with a history of a prior cardiac arrest with ventricular fibrillation(VF) due to myocardial infarction underwent phase I(inpatient) and Ⅱ(outpatient) cardiac rehabilitation(CR) exercise training. On the 33th CR session, 15 min after the start of exercise training, the patient had syncope with evidence of a polymorphic and wide QRS