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目的 :探讨 V1～ 3导联心电图对急性后壁心肌梗死 (PAMI)的诊断价值。方法 :对 2 8例 PAMI V1～ 3导联进行观察分析 ,并与 70例正常人作对照。结果 :PAMI时 ,V1 导联 r/ s≥ 1、r波时限≥ 0 .0 4s的特异性分别达98.6 %与 95 .7% ,高于 V2 导联 ;V2 导联两项指标敏感性为 82 .1%、92 .9% ,高于 V1 导联。V1～ 3导联 ST段压低敏感性 (32 .1% )低 ,但特异性 (10 0 % )高。V1～ 3不仅表现 T波高耸 ,且 Tv2 >Tv1 ,3更为多见。结论 :V1～ 2 导联 r/ s≥ 1、r波时限≥ 0 .0 4s、V1～ 3导联 ST段压低、Tv2 >Tv1 ,3对 PAMI有重要诊断价值 ,作为常规导联 ,具有特殊临床意义
Objective: To investigate the diagnostic value of V1 ~ 3 lead electrocardiogram in acute posterior wall myocardial infarction (PAMI). Methods: 28 cases of PAMI V1 ~ 3 leads were observed and analyzed, and compared with 70 normal controls. Results: The specificity of V1 lead r / s ≥ 1 and r wave duration ≥0.04 s were 98.6% and 95.7% respectively, higher than that of V2 lead in PAMI. The sensitivity of V2 lead was 82.1%, 92.9%, higher than V1 lead. ST segment depression sensitivity (32.1%) in V1 ~ 3 leads was low, but specificity (100%) was high. V1 ~ 3 not only shows the T wave towering, and Tv2> Tv1, 3 more common. CONCLUSIONS: In the V1 ~ 2 lead r / s≥1, the r wave duration≥0.04 s, ST-segment depression in V1 ~ 3 leads and Tv2> Tv1, 3 have important diagnostic value for PAMI. Clinical significance