case_images: PMC3927008_01
case_images: Preoperative electrocardiography. The calculated corrected QT interval from lead II is 455 ms.
case_images: kjae-66-80-g001.jpg
case_images: PMC3927008_01_kjae-66-80-g001.jpg
case_images: F1
case_images: ECG was performed just before surgery and showed atrial fibrillation with a normal heart rate (Fig. 1).
case_images: Changes observed in lead II by electrocardiography (ECG) during anesthesia. (A) ECG after anesthetic induction (QTc = 492 ms) showed QTc interval prolongation. (B) At 50 min after the patient's arrival, large QRS tachycardia appeared (QTc = 480-490 ms). (C) The R-on-T phenomenon and ventricular premature beats were observed during the occurrence of large QRS tachycardia. (D) During cardiac arrest, ECG demonstrated torsade de pointes. ECG: electrocardiography, QTc: corrected QT interval.
case_images: kjae-66-80-g002.jpg
case_images: PMC3927008_01_kjae-66-80-g002.jpg
case_images: F2
case_images: At that time, sudden-onset large QRS tachycardia (Fig. 2B) appeared, and the femoral and radial arterial waves became flat.
case_images: Electrocardiography on the day of patient's expiry. The measured corrected QT interval in lead II is over 500 ms.
case_images: kjae-66-80-g003.jpg
case_images: PMC3927008_01_kjae-66-80-g003.jpg
case_images: F3
case_images: ECG showed a marked prolonged QTc interval (Fig. 3).