Anomalous right ventricle muscle bands and apical ventricular septal defect are two anomalies sometimes associated. We report a fetal diagnosis of a large apical ventricular septal defect, right intraventricular obstruction caused by anomalous muscle bands; consequently, the high right intraventricular pressure resulted in a right-to-left bulging of ventricular septum and moderate tricuspid regurgitation. Postnatal echocardiogram confirmed the fetal diagnosis and defined accurately the right ventricular anatomy through the three-dimensional echocardiographic assessment.
Keywords: 3D echocardiography; anomalous right ventricle muscle band; congenital heart disease; double chambered right ventricle; ventricular septal defect.
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