心电图常以二尖瓣型P波作为诊断左房扩大的依据,但Pv_1终末电势(Ptf-v_1)的负值与左房扩大的关系也已经为心电图及临床工作者所重视。我们通过经超声心动图检查确定为左房扩大的风心病二尖瓣病变的患者83例与心电图二尖瓣型P波及Ptf-v_1作对比分析,并与49名正常人的Ptf-v_1作对照观察,以进一步探讨二者对诊断风心病二尖瓣患者左房扩大的敏感性和Ptf-v_1的标准值。 ECG often use mitral-type P wave as a basis for diagnosis of left atrium enlargement, but the negative terminal value of Pv_1 (Ptf-v_1) and the relationship between left atrial enlargement has also been ECG and clinicians attention. We compared echocardiographic findings of 83 patients with mitral valve disease with enlarged left atrium with electrocardiographic mitral-type P wave and Ptf-v_1, and compared them with Ptf-v_1 of 49 normal subjects Observation to further explore the two for the diagnosis of rheumatic mitral valve left ventricular enlargement sensitivity and Ptf-v_1 standard value.