左心房扩大心电图诊断标准的临床应用价值

目的　探讨体表心电图诊断左心房扩大的各项指标的临床价值。方法　观察、测量 97例经超声心动图确诊有左房扩大患者和 10 6例无心血管疾病经证实无左房扩大的正常对照组的体表心电图的P波宽度 ,切迹峰距 ,PV1负向波深度与宽度 ,P/PR指数。将两组进行对比分析。结果　各项指标中有四项指标病例组与对照组之间差异有显著性 (P <0 .0 1) ,其中最敏感的指标是PV1负向波增宽 (>0 .0 4s) ,敏感性 83% ;最特异性指标是P波增宽有切迹 ,峰距 >0 .0 4s,特异性 93%。结论　心电图出现PV1负向波增宽、加深 ,P波增宽且有切迹等多项指标异常时 ,不失为判断左房扩大的有效方法之一

Clinical Value of ECG Diagnosis Criteria for Left Atrial Amplification

Objective To evaluate the clinical value of body surface ECG diagnosis criteria for left atrial amplification.Methods The P-wave width, peak spacing, PV_1 negative component depth and width, P/PR exponent were measured in 97 patients with left atrial amplification, and compared with that of 106 patients without left atrial amplification.Results Significant difference existed between the two groups in four criteria(P<0.01). The most sensitive criterion was that the negative component widened(>0.04 s), its sensitivity was 83%. The most specific criterion was that the P-wave widened with incisure, peak spacing>0.04 s, its specificity was 93%. Conclusion All ECG diagnosis criteria for left atrial amplification are effectual.