Prenatal interatrial septal aneurysm – an uncommon cause of hypoplastic appearance of the left heart

Purpose: We report a case of prenatal detected interatrial septal aneurysm which led to a significant ventricular dysbalance with dominant right heart and apparently hypoplastic left heart. Case report: A 39 year old II gravida I para at 31+1 weeks of gestation was referred due to a suspected hypoplastic left heart. Indeed the cardiac ventricles showed significant dysbalance with dominant right heart and a small left heart and aorta ascendens. Therefore the 4-chamber-view seemed to be indicative for aortic stenosis. But no stenosis could be objectified. As reason of the striking ventricular appearance a large re…