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分析６６例急性心肌梗塞（ＡＭＩ）的临床左心功能与心电图Ｖ_１导联Ｐ波终末电势（Ｐｔｆｖ_１）的关系，探讨Ｐｔｆｖ_１不同标准诊断ＡＭＩ左心功能不全的敏感性及特异性。结果提示，Ｐｔｆｖ_１＜－０．０４ｍｍ·Ｓ对于ＡＭＩ左心功能不全的诊断是一个较好的指标，过感性７７．４％、特异性９７．１％。相关分析示ＡＭＩＰｔｆｖ_１与左房内径（ＬＡ）呈负相关（ｒ＝－０．５９．Ｐ＜０．０１），直线回归方程为：Ｐｔｆｖ_１＝－０．００２０ＬＡ＋０．０４０，并对ＡＭＩＰｔｆｖ_１异常的机理进行了探讨。
To analyze the relationship between the clinical left ventricular function and the P wave terminal potential (Ptfv_1) in 66 patients with acute myocardial infarction (AMI) and to investigate the sensitivity and specificity of Ptfv_1 criteria for diagnosing left ventricular dysfunction in AMI. The results suggest that, Ptfv_1 <-0.04mm · S for AMI diagnosis of left ventricular dysfunction is a good indicator of sensitivity 77.4%, specificity 97.1%. Correlation analysis revealed a negative correlation between AMIPtfv_1 and left atrial diameter (r = -0.59.P <0.01). The linear regression equation was: Ptfv_1 = -0.0020LA + 0.040, and the mechanism of AMIPtfv_1 abnormality Exploring.