Abstract

Double outlet right ventricle associated with complete atrioventricular (AV) canal is a rare malformation. Nine cases are reported. In this abnormality the anterior AV leaflet is undivided and free floating and the aortic and pulmonary orifices are in the same frontal plane. In four of the nine cases, the conus was bilateral, but it was slightly hypoplastic in two. In five cases there was no subaortic conus and there was mitral-aortic continuity through the ventricular septal defect. Pulmonary stenosis was present in eight cases. Radiograms may best demonstrate the anatomy of the ventricular septal defect; it extends far anteriorly below the aortic valve, and its inferior rim is deviated by the trabecula septomarginalis.

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