alexa Long-term prognosis of probands with Brugada-pattern ST-elevation in leads V1-V3.
Cardiology

Cardiology

Journal of Clinical & Experimental Cardiology

Author(s): Kamakura S, Ohe T, Nakazawa K, Aizawa Y, Shimizu A,

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Abstract BACKGROUND: The prognosis of patients with saddleback or noncoved type (non-type 1) ST-elevation in Brugada syndrome is unknown. The purpose of this study was to clarify the long-term prognosis of probands with non-type 1 ECG and those with coved (type 1) Brugada-pattern ECG. METHODS AND RESULTS: A total of 330 (123 symptomatic, 207 asymptomatic) probands with a coved or saddleback ST-elevation > or = 1 mm in leads V(1)-V(3) were divided into 2 ECG groups-type 1 (245 probands) and non-type 1 (85 probands)-and were prospectively followed for 48.7+/-15.0 months. The absence of type 1 ECG was confirmed by drug provocation test and multiple recordings. The ratio of individuals with a family history of sudden cardiac death (14\%) was lower than previous studies. Clinical profiles and outcomes were not notably different between the 2 groups (annual arrhythmic event rate of probands with ventricular fibrillation; type 1: 10.2\%, non-type 1: 10.6\%, probands with syncope; type 1: 0.6\%, non-type 1: 1.2\%, and asymptomatic probands; type 1: 0.5\%, non-type 1: 0\%). Family history of sudden cardiac death at age <45 years and coexistence of inferolateral early repolarization with Brugada-pattern ECG were independent predictors of fatal arrhythmic events (hazard ratio, 3.28; 95\% confidence interval, 1.42 to 7.60; P=0.005; hazard ratio, 2.66; 95\% confidence interval, 1.06 to 6.71; P=0.03, respectively, by multivariate analysis), although spontaneous type 1 ECG and ventricular fibrillation inducibility by electrophysiological study were not reliable parameters. CONCLUSIONS: The long-term prognosis of probands in non-type 1 group was similar to that of type 1 group. Family history of sudden cardiac death and the presence of early repolarization were predictors of poor outcome in this study, which included only probands with Brugada-pattern ST-elevation. This article was published in Circ Arrhythm Electrophysiol and referenced in Journal of Clinical & Experimental Cardiology

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