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时间频谱标测（ＳＴＭ）心室晚电位（ＶＬＰ）在提高ＶＬＰ阳性病人的准确性上有较大的优势。本文经２２９例心肌梗塞患者的大样本临床验证，并与时域分析进行对照。其结果时域分析ＶＬＰ阳性６６例，ＳＴＭＶＬＰ阳性３７例。在ＶＬＰ阳性病例中发生室性心律失常的分别是时域分析３４例（３４／６６）占５１．５２％，ＳＴＭ３０例（３０／３７）占８１．０８％，Ｐ＜０．０１。对３８例合并室内传导阻滞者且ＶＬＰ阳性并发室性心律失常者，时域分析７例（７／１４）占５０％，ＳＴＭＩ２例（１２／１６）占７５％，Ｐ＜０．０２，利用心电图Ｗａｇｎｅｒ积分判定心肌梗塞面积，时域分析与ＳＴＭ在大面积心梗（≥１０分）组，分别是１０例（１０／６６）占１５．１５％、与１３例（１３／１７）占３５．１３％，Ｐ＜０．０２，有显著性差异。作者认为ＳＴＭ更为合理，它可使ＶＬＰ检测的准确性提高。
Time-frequency mapping (STM) ventricular late potentials (VLPs) have great advantages in improving the accuracy of VLP-positive patients. In this paper, a large sample of 229 patients with myocardial infarction clinical validation, and time-domain analysis of the control. The results of time-domain analysis of VLP-positive in 66 cases, STMVLP-positive in 37 cases. Ventricular arrhythmias in VLP-positive cases were 34.5% (34/66) in time domain analysis and 81.08% (30/30) in STM (P <0.01). Of the 38 patients with AV block and VLP positive ventricular arrhythmia, time-domain analysis of 7 cases (7/14) accounted for 50%, STMI 2 cases (12/16) accounted for 75%, P <0.02, The area of myocardial infarction was determined by Wagner integral ECG. Time domain analysis and STM in large myocardial infarction (≥10 points) group were 10.15% (10/66) and 15.15% (13/17) respectively 35.13%, P <0.02, there is a significant difference. The author believes that STM is more reasonable, it can improve the accuracy of VLP detection.