Joana Brito, Nuno Cortez-Dias, Gustavo Lima da Silva, Afonso Nunes Ferreira, Inês Aguiar Ricardo, Nelson Cunha, Pedro Silvério António, Irina Neves, Sandra Paiva, Ana Paixão, Fernanda Gaspar, Adília Silva, Andreia Magalhães, Pedro Marques, Fausto J Pinto, João de Sousa
BACKGROUND: Brugada syndrome (BrS) is associated with abnormal electrophysiological properties at right ventricular epicardium, consisting of fragmented electrograms extending well beyond QRS termination. We aimed to evaluate the utility of signal-averaged electrocardiogram (SA-ECG) for the noninvasive assessment of late potentials (LP) and risk stratification of BrS patients. METHODS: A prospective, observational, single-center study of BrS patients is submitted to SA-ECG with the determination of the total filtered QRS duration (fQRS), root mean square voltage of the 40 ms terminal portion of the QRS (RMS40), and duration of the low-amplitude electric potential component of the terminal portion of the QRS (LAS40)...
November 15, 2023: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing