Forty-eight patients with double-chambered right ventricle (DCRV) were prospectively studied over a 3-year period. Clinical, echocardiographic, hemodynamic, and angio graphic studies were done in all. Three patients were studied postoperatively also. Fifteen patients underwent surgery confirming the diagnosis. Echocardiography detected anomalous muscle bundles (AMBs) in 39/41 patients in whom this study was carried out. Angiographically AMBs were best demonstrated in anteroposterior views in a systolic frame. Common associated anomalies found with DCRV were ventricular septal defects (69%), pulmonary valve stenosis (38%), and double-outlet right ventricle (10%).
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