Japanese Journal of Electrocardiology
Online ISSN : 1884-2437
Print ISSN : 0285-1660
ISSN-L : 0285-1660
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Volume 36, Issue 2
Displaying 1-15 of 15 articles from this issue
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  • Assessment of Criteria of Ventricular Late Potential Measurement Using 187-channel Signal-averaged Vector-projected High-resolution Electrocardiograph
    Yoshihiro Obara, Koichi Takeuchi, Natsuko Ohsawa, Masako Hiruta, Atsus ...
    2016 Volume 36 Issue 2 Pages 107-117
    Published: 2016
    Released on J-STAGE: April 03, 2017
    DOIhttps://doi.org/10.5105/jse.36.107
    JOURNAL FREE ACCESS
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    Purpose : We developed a novel 187-channel signal-averaged vector-projected high-resolution electrocardiograph (SAVP-ECG) for detecting abnormalities in the spatial location of ventricular late potentials (VLP). The Predictor (Corazonix) is a standard system for detecting VLP with a high predictive accuracy in patients with ischemic heart disease. This study was conducted to verify the validity of the criteria for measuring ventricular VLP by SAVP-ECG. Object and method : We consecutively evaluated 615 patients with cardiovascular disease. We examined the VLP index (filtered QRS [f-QRS], RMS40, LAS) determined by the Predictor and SAVP-ECG. We evaluated the correlation of the VLP index with the prior development of lethal ventricular arrhythmia in 135 patients with ischemic heart disease. Result : The VLP index of the two models showed a significant correlation. The positive standard values of the VLP index by SAVP-ECG were f-QRS≥127msec, RMS40<16μV and LAS >44msec. The predictive values for lethal ventricular arrhythmia by the Predictor and SAVP-ECG were 84.6% and 69.2% for sensitivity, 71.3% and 67.2% for specificity, 23.9% and 18.0% for positive-predictive value, 97.8% and 96.5% for negative-predictive value, and 72.6% and 67.4% for predictive accuracy, respectively. Conclusion : Our study showed that there were significant correlations between the indexes (f-QRS, RMS and LAS) using SAVP-ECG and those using Predictor.
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