下位法和后位法房室结改良成功部位心内电图比较

Comparison of inferior Approach with Posterior Approachon Introcardiac ECG of Successful Sites forAtrioventricular Nodal Modification

我们对比了４２例慢快型房室结折返性心动过速患者下位法（ｎ＝３６）和后位法（ｎ＝１４）慢径改良成功部位的心内电图。下位法比后位法Ａ波较宽（Ｐ＝０．０１），交接区心律的出现率高（Ｐ＝０．００６８）。Ａ波宽度≥６０ｍｓ和交接区心律出现在下位法消融时的阳性预测值分别为４８．８％和３２．６％；阴性预测值分别为９０．７％和９６．１％。

The differences of introcardiac ECG parameters for slow pathwaymodification between successful inferior approach sites (n=36) and successful posteriorapproach sites (n=14) were analysed in 42 slow-fast AVNRT cases. A wave was widerand junctional rhythm was more frequent in successful inferior approach sites (P=0. 001, 0. 0068). The positive predictive values of A Wave≥60 ms and junctionalrhythm were 48. 8% and 32. 6% respectively and their negative predictive values were90. 7% and 96.1% respectively with inferior approach.