Fig. 1.

Electrocardiography (ECG) of a patient with prominent QTc prolongation. The patient complained of intermittent palpitation and diaphoresis with syncope for 4 years. A: her ECG on admission showed normal sinus rhythm with a prolonged QTc interval (596 msec). B: two days after admission, a sudden onset of chest pain and syncope with loss of consciousness occurred abruptly, and ECG monitoring indicated torsades de pointes. C: after right adrenal gland removal, her electrocardiography returned to normal.