Abstract
Congenitally corrected transposition of the great arteries (CCTGA) has a high incidence of dextrocardia and complete heart block. We describe a 34 year-old male with CCTGA, dextrocardia, and third degree atrioventricular block status-post dual chamber pacemaker that presented with acute heart failure syndrome. Cardiac CT Angiography confirmed CCTGA with situs solitus and dextrocardia. EKG with standard frontal leads showed a normal P wave axis and right-sided precordial leads showed a right bundle branch block pattern. With situs solitus there is a normal P wave axis on standard frontal leads. With nonsystemic ventricular pacing in CCTGA with dextrocardia left- and right-sided precordial leads show a left bundle branch block pattern and right bundle branch block pattern respectively. This case highlights electrocardiographic patterns seen with dextrocardia and morphologic reversal of ventricles.
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