心室晚电位的频谱分析

Frequent Spectrum Analysis of Ventricular Late Potential(VLP)

用体表叠加平均心电图(SAECG)记录分析系统对115例正常人和116例冠心病心肌梗塞(MI)患者作SAECG 记录并进行心室晚电位(VLP)及频谱分析,发现 MI 患者 VLP 阳性率为37.30%;正常人 SAECG 频谱的高频成份(20—150Hz)明显低于 MI 患者(P<0.01),低频成份(0—20Hz)明显高于 MI 患者(P<0.01)。提示 MI 患者可能发生 VLP,其频率结构中高频成份明显增多。

Surface averaged ECG(SAECG)was recorded and VLP as well as the frequent spectrum of SAECG was detected and analysed in normal subjects(n=115)and MI patients(n=116)with ART-system.The incidence of VLP in MI patients was 37.30%;the high frequent component(20—150Hz)of the frequent spectrum of SAECG in the normal subjects was significantly lower than in the MI patients(P<0.01),and the low frequent component(0—20Hz)was significantly higher than in the MI patients(P<0.01).It was suggested that VLP might occur in MI patients and the high frequent component of their frequent spec- trum of SAECG might be a lot higher.