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例1（父）：67岁，工人。53岁时出现头晕、眼花、乏力、胸闷、心率40～50次/分。近1年心率有时达30次/分，已反复晕厥9次。查体：BP13.3/10.7kPa。无紫绀，两肺呼吸音清晰。心界不大，心率45次/分，律不齐，未闻及杂音。肝脾未触及，双下肢无水肿。心电图示窦缓、窦停，停搏时间3.86～6.8秒，结性逸搏心律；偶发频繁房早，多数未下传心室，一过性房扑呈2～4:1下传心室。胸部X线片，心脏超声，血液生化检查等均正常。阿托品及异丙肾上腺素不能提升心室率，仍有晕厥发作。诊断为病窦综合征，慢快型。1986年10月，经左颈外静脉途径安置按需型心脏起搏器（华伟YCP—Ⅰ），心室起搏心率70次/分，术后曾反复发生房扑2～4:1下传心室，1周后为稳定心室起搏心律，临床症状缓解。1989年3月因电源耗竭，又经右颈外静脉途径置入心
Example 1 (parent): 67 years old, worker. 53 years old when dizziness, vertigo, fatigue, chest tightness, heart rate 40 to 50 beats / min. Nearly 1 year heart rate sometimes up to 30 beats / min, has been repeated syncope 9 times. Physical examination: BP13.3 / 10.7kPa. No cyanosis, clear breath sounds of both lungs. Heart is not big, heart rate 45 beats / min, irregularity, no smell and noise. Liver and spleen not touched, no lower extremity edema. Electrocardiogram showed slow sinus, sinus arrest, arrest time 3.86 ~ 6.8 seconds, nocturnal discharge rhythm; occasional frequent room early, most did not download the ventricle, a sexual atrial flutter was 2 ~ 4: 1 download ventricle. Chest X-ray, cardiac ultrasound, blood biochemical tests were normal. Atropine and isoproterenol can not improve ventricular rate, there is still a syncope. Diagnosis of sick sinus syndrome, slow type. In October 1986, an on-demand pacemaker (Huawei YCP-Ⅰ) was placed in the left external jugular vein. Ventricular pacing was performed at a rate of 70 beats / min. Atrial flutter was recorded 2-4 times after surgery Ventricular, stable ventricular pacing after 1 week, clinical symptoms relieved. 1989 March due to power depletion, but also by the right external jugular vein into the heart