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患儿女性,5岁.因胸闷、气短、心悸半月入院.体检:发育正常,心脏各瓣膜区无病理性杂音,四肢关节无肿痛.心脏彩色多普勒示二尖瓣前叶稍增粗.ASO<500U.附图为入院时Ⅱ导联心电图,中下行为连续记录,有如下特点:(1)下传的P波有高尖、低平两种形态,其间无渐变规律,P-R间期均为0.12s,可排除窦房结内游走心律.对照随访心电图可确认窦性P波低平,有明显不齐,P-P间距0.88—O.68s,频率68—86次/min.它们包括上行P_(1、59)、中行P_(6-9)及下行P_(1-3,6、(?))(埋藏于QRS波中).(2)房性P’
Pediatric women, age 5. Due to chest tightness, shortness of breath, palpitations half a month admitted to hospital Physical examination: normal development, the heart valve area without pathological murmur, limbs and joints without swelling and pain .Central color Doppler showed mitral valve anterior thickening .ASO <500U .Painted as Ⅱ lead electrocardiogram on admission, the middle and lower behavior continuous record, has the following characteristics: (1) the descending of the P wave has high sharp, low flat two forms, there is no gradual change between the PR room Period were 0.12s, can rule out walking within the sinoatrial node heart rate.Control follow-up electrocardiogram can confirm the sinus P wave low flat, obvious irregularity, PP spacing 0.88-O. 68s, the frequency of 68-86 times / min. Including the uplink P_ (1,59), the Bank of China P_ (6-9) and downlink P_ (1-3,6, (?)) (Buried in the QRS wave) (2) Atrial P ’