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Arrhythmogenic right ventricular cardiomyopathy and left atrial tachycardia: a case report
Cedric Klein1, Zouheir Souissi1, François Brigadeau1
1Department of Cardiovascular Medicine, University of Lille CHU Lille, F-59000 Lille, France.
Abstract:
Little is known about atrial arrhythmias in arrhythmogenic right ventricular cardiomyopathy (ARVC). A 46-year-old man with definite ARVC presented with palpitations and exertional dyspnoea. Electrocardiogram showed a supraventricular tachycardia. Despite no prior cardiac surgery or atrial fibrillation ablation, electrophysiological study revealed a left atrial (LA) re-entrant circuit characterized by a slow fractionated potential bounded by two areas of double potentials giving a figure-of-eight pattern on activation map. Located on the LA roof within a zone of low bipolar voltages, this unusual substrate can be associated with a primitive atrial myopathy in ARVC.
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