患者男性,38岁,工人,困阵发性心悸、头晕一年余入院疗养.除心电图检查有心律失常外,体检、胸片、B型超声波、心机械图及有关生化检查均未发现异常.临床诊断:心律失常原因待查.附图上行为Ⅱ导联,中、下两行为V_1导联连续记录.P-P规则,频率为60次/分,QRS有两种形态,一种与P波相关的在Ⅱ导联呈Rs型,在V_1导联呈rS Male, 38 years old, worker, sleepy palpitations palpitations, dizziness more than a year admitted to hospital.In addition to ECG examination of arrhythmia, physical examination, chest X-ray, B-mode ultrasound, mechanical and mechanical biochemical examination showed no abnormalities. Clinical diagnosis: the cause of arrhythmia to be investigated.Part IIThe act of lead, in the next two lines as the V_1 lead continuous record.PPP rules, the frequency of 60 beats / min, QRS has two forms, one with P wave The Ⅱ lead was Rs type, V_1 lead was rS