Fig. 2

Changes in electrocardiography (ECG) at the time of the first complete atrioventricular block. A, ECG recorded at entering the operating room showing sinus rhythm of 102 bpm. B, ECG recorded 9ย min after administration of remifentanil showing Wenckebach type II AV block, QRS rate of 60ย bpm. Arrows indicate P wave. C, ECG recorded 13ย min after remifentanil administration showing complete AV block, QRS rate of 44ย bpm. Arrows indicate P wave. D, ECG recorded 5ย min after administration of 0.5ย mg of atropine sulfate showing sinus rhythm, 140ย bpm