Ventricular Tachycardia and Early Fibrillation in Patients with Brugada Syndrome and Ischemic Cardiomyopathy Show Predictable Frequency-Phase Properties on the Precordial ECG Consistent with the Respective Arrhythmogenic Substrate

This study was supported by the National Heart, Lung and Blood Institute (P01-HL039707, P01-HL087226 R01-HL118304); the Spanish Society of Cardiology, Arrhythmia and Electrophysiology Section; the Leducq Foundation, Paris, France; Centro Nacional de Investigaciones Científicas, Madrid, Spain; Generalitat Valenciana, Valencia, Spain (PROMETEO/2012/030); VI Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica from the Ministerio de Economía y Competitividad of Spain (TIN2012- 37546-C03-01); and the European Commission (European Regional Development Funds [ERDF]-FEDER)