[左心动脉负荷过重。心电-超声心动图相关性]

[Left arterial overload. Electro-echocardiographic correlations].

作者信息

Koehler N R, Velho F J, Collar I C, Zouvi J P, Behr P B

机构信息

Hospital São Lucas, Porto Alegre, RS.

出版信息

Arq Bras Cardiol. 1993 Apr;60(4):247-51.

PMID:8311733

Abstract

PURPOSE

To compare the accuracy of left atrial enlargement (LAE) diagnosis made by electrocardiographic criteria with those obtained using M-mode echocardiography.

METHODS

We studied 273 patients age 17 to 87 (mean 49) years, 115 men, white 95.5%, black 3.5% mulattos 1%, with or without heart disease of different etiologies. The ECG criteria studied were: a) P terminal force in V1 > or = 0.04 mmx s; b) Pt force in V1 duration > 0.04s; c) Pt force in V1 depth > or = 1 mm; d) P wave notching in D2 with interpeak distance > or = 40ms; f) presence of atrial fibrillation. The gold-standard for LAE was left atrial dimension > 40 mm obtained by echocardiography.

RESULTS

The percentage of correct diagnosis were: atrial fibrillation (88%), Morris index (75%), PtfV1 negativity > or = 1 mm (74%), notched P wave in D2 with interpeak distance > or = 0.04 s (70%), PtfV1 with duration > 0.04 s (64%) and P wave duration in D2 > 0.11s (46%).

CONCLUSION

Conventional ECG has limited value for detecting LAE. A higher correlation was found between atrial fibrillation and changes in P wave in V1 and the echocardiographic LAE.

摘要

目的

比较心电图标准诊断左心房扩大（LAE）与M型超声心动图诊断的准确性。

方法

我们研究了273例年龄在17至87岁（平均49岁）的患者，其中男性115例，白人占95.5%，黑人占3.5%，混血儿占1%，患有或未患有不同病因的心脏病。研究的心电图标准为：a）V1导联P波终末电势≥0.04 mm×s；b）V1导联Pt波时限>0.04s；c）V1导联Pt波深度≥1 mm；d）Ⅱ导联P波有切迹且峰间距≥40ms；f）存在心房颤动。LAE的金标准是超声心动图测得的左心房内径>40 mm。