Estudio electrofisiológico como método de estratificación de riesgo de muerte súbita en el Síndrome de Brugada

Abstract

Introduction: electrophysiological study has been used as a diagnostic method and predictor of sudden cardiac death in patients with Brugada syndrome, allowing stratification of the risk of developing malignant ventricular arrhythmias. However, in recent years, its usefulness has been questioned. Objective: to describe the electrophysiological study as a method for stratifying the risk of sudden death in Brugada syndrome. Methods: an electronic search was performed in databases such as: Pubmed, ScienceDirect and Scielo in a period from January 2018 to February 2023, keywords such as; Cardiac Arrhythmias, Brugada Syndrome, Electrophysiologic Techniques, Sudden Death were also used, according to bibliographic descriptors DeCS and MeSH in addition to bilean operators such as "AND, OR and NOT". Results: a total of 14 studies were identified, most of them reported the electrophysiological study as a good predictor of risk of sudden cardiac death, the main findings were: right bundle branch block and ST segment deviation in lead V1, QT prolongation, type 1 ECG pattern, presence of a prolonged Tpeak-Tend QRS interval with ventricular effective refractory period <200, and other arrhythmic events that in patients with Brugada Syndrome may increase the risk of sudden death. Conclusion: electrophysiological study in patients diagnosed with Brugada syndrome is a good marker of long-term cardiac events and may even be useful for predicting a greater association with risk of sudden death.