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Mechanisms of ventricular arrhythmias in ARVC versus BS. In ARVC the predominant ventricular arrhythmia is a monomorphic ventricular tachycardia due to a scar-related macro-reentry circuit (A). The typical ventricular arrhythmia of BS is a rapid polymorphic ventricular tachycardia which results from a phase-2 reentry mechanism and may degenerate into ventricular fibrillation (see the text for further explanation)
