患者,男性,23岁,因阵发性心悸3年加重2天于1994年1月入院。曾于1993年6月因感冒后心悸、胸闷,按“病毒性心肌炎、频发室性早搏、房性早搏”住进当地医院,予心律平0.1g,3次/日,安搏律定0.05g,3次/日,利多卡因0.4g溶于5％葡萄糖液500ml中静滴后,患者出现憋气,心电图(ECG)示窦性停搏2秒,Ⅱ度窦房传导阻滞,停药后好转,住院20余天出院。出院后多次出现漏跳,未查ECG而自服上述两种药物(量及用法同上),连服3个月余,漏跳时多时少,后又间断服用,1994年初感冒后加重,遂来北京某医院门诊就医,心率最慢达38次/分,夜间尤甚.动态心电图示:窦性心动过缓,交界性逸搏,频发“室性早搏”(实际上是交界性逸搏—窦性夺获伴室内差异性传导),曾内服安他心0.1g,3次/口,2天后漏跳更多,但无晕厥史,遂来我院住院。查体:T 36.3℃,P 48次/分,R 18次/分,BP 14/8kPa,一般情况可,肺部无罗音,心率48次/分,律不齐,可闻长间歇(3～4次/分),无杂音;超声心动图(UCG)示:右 Patient, male, 23 years old, 3 years exacerbated by paroxysmal palpitations 2 days admitted to hospital in January 1994. Had in June 1993 after a cold due to palpitations, chest tightness, according to “viral myocarditis, frequent ventricular premature beats, atrial premature beats,” admitted to the local hospital, to heart rhythm 0.1g, 3 times / day, ambroxidine 0.05 g, 3 times / day, lidocaine 0.4g dissolved in 500ml of 5% glucose solution intravenous infusion, the patient appeared suffocated, electrocardiogram (ECG) showed sinus arrest for 2 seconds, Ⅱ degree sinoatrial block, withdrawal After improvement, more than 20 days hospital discharge. After discharge from the hospital many times missed jump, did not check ECG and self-service of the above two drugs (amount and usage ibid.), And even served more than 3 months, missed skip more than less time, and then take it intermittently, increased in early 1994 after a cold, then To a Beijing hospital outpatient medical treatment, the heart rate of the slowest rate of 38 beats / min, especially at night. Holter: sinus bradycardia, junctional escape, frequent “premature ventricular contractions” (in fact, - sinus seizures with intra-ventricular differential conduction), had taken orally Ataxin 0.1g, 3 times / mouth, 2 days after jumping more, but no history of syncope, then came to our hospital. Physical examination: T 36.3 ℃, P 48 beats / min, R 18 beats / min, BP 14 / 8kPa, the general situation may be, no lung sound, heart rate 48 beats / ~ 4 times / min), no noise; echocardiography (UCG) shows: right