Anomalous right ventricular muscle bands obstructing a large apical muscular ventricular septal defect: From fetal to post-natal three-dimensional assessment.

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.