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患者男性,72岁,冠脉搭桥术后约一月自发地发生Ⅲ度房室传导阻滞。未曾服用引起房室传导阻滞的药物。因患者既往有心肌梗塞而致的显著左心功能不全史,而置入DDD起搏器,起搏频率程控至下限75bpm,上限125bpm。房室延时150ms,心房不应期为325ms。术后无症状,体格检查:血压110/80mmHg,脉律整齐,90bpm。有颈静脉扑动波,心脏检查无明显异常。以常规心电图评价起搏器功能,并应用磁铁试验使起搏器转变为DOO型,分别见图:A、B。
Male, 72 years old, had a third-degree atrioventricular block spontaneously about January after coronary bypass surgery. Have not taken drugs that cause atrioventricular block. Due to previous history of patients with myocardial infarction caused significant left ventricular dysfunction, and into the DDD pacemaker, pacing frequency programmed to the lower limit of 75bpm, the upper limit of 125bpm. Atrioventricular delay 150ms, atrial refractory period of 325ms. Postoperative asymptomatic, physical examination: blood pressure 110 / 80mmHg, pulse law and order, 90bpm. A jugular vein flutter wave, cardiac examination no obvious abnormalities. Evaluation of pacemaker function with conventional ECG, and the application of magnet test to pacemaker into DOO type, respectively, see: A, B.