Exercise ECG unmasked Brugada sign: Manifestation of the risk of sports-associated sudden cardiac arrest (RCD code: V-1A.1)

Abstract

Sports-associated sudden cardiac arrest (SCA) constitutes an important problem. Causes of SCA during sport activities include Brugada syndrome (BrS) among others. We describe a 29-year-old male, without a history of cardiovascular disease, who suffered from SCA during football training and despite intensive treatment, after almost 4 weeks of hospitalization, unfortunately died. Detailed medical documentation review showed grade I atrioventricular block, intraventricular conduction abnormalities and BrS type 2 morphology of ST-segment elevation on resting 12-lead electrocardiogram (ECG). The patient had a history of syncope during physical activity. Further echocardiographic study did not reveal significant structural heart disease. Submaximal exercise testing was performed and showed ventricular extrasystoles during physical activity and type 1 BrS morphology of ST-segment elevation during recovery phase. We compared observed ECG changes to those present in a healthy football player and described noticeable similarities. Exercise ECG testing, especially in patients after syncope of probable arrhythmic etiology, may unmask BrS ECG pattern and lead to BrS diagnosis.