Unstable QT Interval Dynamics Precedes VT Onset in Patients with Acute Myocardial Infarction: A Novel Approach to Detect Instability in QT Interval Dynamics from Clinical ECG

摘要

BackgroundInstability in ventricular repolarization in the presence of premature activations (PA) plays an important role in arrhythmogenesis. However, such instability cannot be detected clinically. This study developed a methodology for detecting QT interval (QTI) dynamics instability from the ECG, and explored the contribution of PA and QTI instability to ventricular tachycardia (VT) onset.