Bepridil was administered to all patients at an initial dose of 100 mg/day within 1 month before CA and continued for at least 2 months after CA. The maximum dose of bepridil was 200 mg/day. If the QTc interval exceeded 500 ms, bepridil was either discontinued or the dosage was reduced. All patients were recommended to discontinue bepridil 2 to 3 months after CA. However, continuation was allowed upon the patient’s request, and subsequent discontinuation was determined based on mutual agreement between the attending physician and the patient.