摘要
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 complex tachycardia on electrocardiogram(ECG)monitoring.The initiation of a polymorphic ventricular tachycardia was evidenced by the coupled premature ventricular complex observed in the ECG monitoring screen(Figure 1).
