患儿女性,12岁,临床诊断:病毒性心肌炎。入院前心电图Ⅱ导联连续描记(附图):上行P_(1、2、4、12、13),中行P_(1—711—13),下行P_(1、3、4、6-15)为窦性P,频率79次/分,P-R0.12秒。另可见一系列提前出现的P′—QRS—T,上行P′_(3、5—11)、中行P′_(3-10)、下行P′_(2、5),P′负正双向,P′-R0.12秒,QRS形态正常。P连续出现呈长、短间距交替发生。每个长、短间距之和是0.49秒的3倍,提示有文氏型传出阻滞。异位频率为125次/分。联律间期不等,如上行 Children with children, 12 years old, clinical diagnosis: viral myocarditis. Pre-admission ECG Ⅱ lead continuous tracing (with photos): the uplink P_ (1,2,4,12,13), the Bank of P_ (1-711-13), downlink P_ (1,3,4,6-15) For sinus P, the frequency of 79 beats / min, P-R0.12 seconds. In addition, a series of pre-existing P’-QRS-T, P’_ (3,5-11), P’_ (3-10), P’_ (2,5) Two-way, P’-R0.12 seconds, QRS morphology is normal. P appeared in a row was continuous, short pitch alternately. The sum of each long and short pitch is three times 0.49 seconds, suggesting a Wen’s type block. Ectopic frequency of 125 beats / min. Undertakings between the law, such as the uplink