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患者女性,65岁,临床疑诊:冠心病。心电图(附图)为12导联同步记录:奇数心搏为窦性搏动,P、QRS 波均正常,P-R0.16s。偶数心搏提前出现,前有P′相关,P-P′间距固定为0.42s,为房早二联律。后继QRS 波在肢导联分属两类:(1)左前分支阻滞(LAH)型:Ⅰ、Ⅱ、Ⅲ导联R_(4、8、12),aVR、aVL、aVF 导联R_2宽0.08s,S_Ⅲ>S_Ⅱ,R_(aVL)>R_(I、aVR),电轴左偏达-75°,P′-R 间期为0.1 6s,QRS 呈室内差异性传导,(2)不完全
Patient female, 65 years old, clinically suspected: Coronary heart disease. ECG (with photos) 12-lead synchronization records: odd heartbeat sinus beats, P, QRS wave were normal, P-R0.16s. Even heartbeats appear in advance, before the P ’related, P-P’ spacing was fixed at 0.42s, for the room early two joint law. Subsequent QRS wave in the limb leads belong to two categories: (1) left anterior branch block (LAH) type: Ⅰ, Ⅱ, Ⅲ lead R_ (4,8,12), aVR, aVL, aVF lead R_2 width 0.08 s_Ⅲ> S_Ⅱ, R_ (aVL)> R_ (I, aVR). The left axis of the electric axis is -75 °, the interval of P’-R is 0.1 6s, QRS is indoors differential conduction, (2)