T-wave Peak-to-End Changes Quantified by Time-Warping Predicts Ventricular Fibrillation in a Porcine Myocardial Infarction Model
Background: The T-peak-to-T-end ($\mathrm{T}_{pe}$) interval has shown potential in predicting ventricular arrhythmic risk. It is an appealing index to be measured during ischemia since it is less influenced by ST-segment changes than the early part of the T wave. A time-warping-based index, derived from a spatially transformed PCA lead, $d^{{\kern0.28436pt}\text{PCA}}_{w,{\scriptscriptstyle \math