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患者男,19岁,临床拟诊为心肌炎。心电图特征图为Ⅱ导心电图,存在两种形态的P波。直立者为正常的窦性P波、P_1、P_2的P—R间期分别为0.18和0.20S,逐渐延长。第二个QRS波群后有负向的P波,R—P为0.12S,判为逆行P-波,其后有QRS波群相随,但P~-—R间期较其前的P—R间期有较明显的延长,为0.34S。第三个QRS波群后仍随以逆行P波,R—P间期同为0.12S,但其后无QRS波相随。R—R间期不规则,呈三联律。QRS形态一致。继P_2QRS脱落后,P_3又为窦性。如此周而复始。
Male patient, 19 years old, clinically diagnosed as myocarditis. Electrocardiogram characteristics of Ⅱ lead ECG, there are two forms of P wave. The upright person was the normal sinus P wave. The P-R intervals of P 1 and P 2 were 0.18 and 0.20 S, respectively, which gradually extended. After the second group of QRS complex negative P wave, R-P was 0.12S, sentenced retrograde P-wave, followed by QRS complex, but P ~ - R interval than the previous P R interval was more significant extension of 0.34S. After the third QRS wave group with retrograde P wave, R-P interval with the same 0.12S, but no accompanying QRS wave. R-R interval irregular, was triple law. QRS morphology consistent. Following P 2QRS off, P_3 is sinus. So round again.