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本文利用计算机信号平均技术及频谱估计方法对110人从体表检测心室晚电位。59个正常人中仅1例发现晚电位,阳性率为1.7％,心肌梗塞未并发室性心律失常患者24例中20.8％(5/24)有晚电位;心肌梗塞并发室性心律失常5例病人中80％(4/5)有晚电位。下壁梗塞者晚电位阳性率47.06％,高于其它部位梗塞者(8.33％)。室性早搏组及非持续性室速患者晚电位阳性率分别为30％(3/10)和38.46(5/13),而持续性室速患者阳性率高达100％(4/4)。研究结果表明:(1)心室晚电位与室性心律失常,特别是持续性室速有密切关系;(2)频阈法体表检测晚电位可能成为辨识心肌梗塞后有严重室性心律失常倾向病人的一种无创方法。
In this paper, using computer averaging techniques and spectral estimation methods to detect 110 people from the body surface ventricular late potential. Only 1 out of 59 normal subjects found late potentials, with a positive rate of 1.7%. 20.8% (5/24) of 24 patients with myocardial infarction without ventricular arrhythmia had late potentials. 5 patients with myocardial infarction complicated with ventricular arrhythmias Eighty percent (4/5) of patients have late potentials. Lower posterior wall posterior potential positive rate was 47.06%, higher than other parts of the infarct (8.33%). The positive rates of late potentials were 30% (3/10) and 38.46 (5/13) in patients with premature ventricular contractions and those with non-sustained ventricular tachycardia, respectively. The positive rate of persistent ventricular tachycardia was 100% (4/4). The results show that: (1) ventricular late potential and ventricular arrhythmias, especially the sustained ventricular tachycardia are closely related; (2) frequency threshold method of the body surface of the late potential may be identified after myocardial infarction with severe ventricular arrhythmias tend to A non-invasive method for the patient.