Dependency of Exercise-Induced T-Wave Alternans Predictive Power for the Occurrence of Ventricular Arrhythmias from Heart Rate

摘要

BackgroundT-wave alternans (TWA) is a noninvasive index of risk for the occurrence of ventricular arrhythmias. It is known that TWA amplitude (TWAA) increases with heart rate (HR) but how the TWA predictive power varies with HR remains unknown. Thus, the aim of this study was to evaluate the dependency of exercise-induced TWA predictive power for the occurrence of ventricular arrhythmias from HR.