Multimodal Imaging Characterization of a Congenital Multilobular Interventricular Membranous Septal Aneurysm in a Patient Presenting with Embolic Stroke.

• TTE is often performed to search for cardiac sources of emboli. • TTE must be comprehensive and assess the atria, valves, and ventricles. • TTE can be utilized to identify IVMSA as a rare cause of recurrent strokes. • Comprehensive imaging studies should be utilized to confirm the diagnosis of IVMSA. • Multidisciplinary care is necessary in the management of these patients.