期刊
CARDIOVASCULAR DIGITAL HEALTH JOURNAL
卷 4, 期 1, 页码 1-8出版社
ELSEVIER
DOI: 10.1016/j.cvdhj.2022.10.006
关键词
Electrocardiography; ECG; QTc interval; QT interval; Nu-merical techniques
The article introduces a new QT correction method, AccuQT, which computes QTc by minimizing the information transfer from R-R to QT intervals. The results show that AccuQT outperforms other commonly used correction methods and has the potential to become the method of choice in clinical studies and drug development.
BACKGROUND The QT interval in the electrocardiogram (ECG) is a fundamental risk measure for arrhythmic adverse cardiac events. However, the QT interval depends on the heart rate and must be cor-rected accordingly. The present QT correction (QTc) methods are either simple models leading to under-or overcorrection, or imprac-tical in requiring long-term empirical data. In general, there is no consensus on the best QTc method. OBJECTIVE We introduce a model-free QTc method-AccuQT- that computes QTc by minimizing the information transfer from R-R to QT intervals. The objective is to establish and validate a QTc method that provides superior stability and reliability without models or empirical data. METHODS We tested AccuQT against the most commonly used QT correction methods by using long-term ECG recordings of more than 200 healthy subjects from PhysioNet and THEW databases. RESULTS AccuQT overperforms the previously reported correction methods: the proportion of false-positives is reduced from 16% (Ba-zett) to 3% (AccuQT) for the PhysioNet data. In particular, the QTc variance is significantly reduced and thus the RR-QT stability is increased. CONCLUSION AccuQT has significant potential to become the QTc method of choice in clinical studies and drug development. The method can be implemented in any device recording R-R and QT in-tervals.
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