Complete Right Bundle Branch Block in Arrhythmogenic Cardiomyopathy: Similarities to Brugada Syndrome

Abstract

Background: In arrhythmogenic cardiomyopathy complete right bundle branch block do appear. In rare cases complete right bundle branch block with Brugada-like presentation. Method: In 24 patients with typical arrhythmogenic cardiomyopathy ECG showed complete right bundle branch block. In 17 cases atypical RBBB with low voltage were present, in 7 cases typical rSR’ RBBB occurred. Results: Brugada-like ECG could be excluded in 6 cases of typical complete rSR’ right bundle branch block, only in one case Brugada ECG with coved-type ST segment elevation, sharp upstroke and symmetrical T-wave inversion was present. Conclusion: In typical arrhythmogenic cardiomyopathy atypical low voltage and typical rSR’ right bundle branch block appear. Only in one case with typical arrhythmogenic cardiomyopathy the ECG resembles classical Brugada ECG. In right bundle branch block both-arrhythmogenic cardiomyopathy and Brugada-like syndrome-could be presented as an overlap syndrome.