Shimai N, Yokoyama K
Masui. 1989 May;38(5):684-7.
A 38-year-old male received internal hemorrhoidectomy under spinal anaesthesia. Subarachnoid puncture was performed between the L4-5 lumbar interspace by a 25 gauge disposable spinal needle under sitting position. Forty five mg of 5% pethidine was injected into the subarachnoid space. The level of analgesia was L3. After 15 minutes, sinus brady-dysrhythmia was observed on ECG monitor. Heart rate dropped to 37 beats.min-1 and blood pressure was 85/39 mm Hg. Following administration of atropine 0.5mg intravenously, atrioventricular block (Wenckebach type) was observed. In a short period, ECG changed to normal sinus rhythm but PQ interval remained at 0.2 msec (1st degree AV block), but blood pressure returned to normal. Thereafter no ECG change was observed during intra and postoperative periods.
一名38岁男性在脊髓麻醉下接受内痔切除术。在坐位下，用25号一次性脊髓穿刺针于L4 - 5腰椎间隙进行蛛网膜下腔穿刺。将45毫克5%的哌替啶注入蛛网膜下腔。镇痛平面为L3。15分钟后，心电图监测仪上观察到窦性心动过缓。心率降至37次/分钟，血压为85/39毫米汞柱。静脉注射0.5毫克阿托品后，观察到房室传导阻滞（文氏型）。短时间内，心电图变为正常窦性心律，但PQ间期仍为0.2毫秒（一度房室传导阻滞），但血压恢复正常。此后，术中及术后期间未观察到心电图变化。
