Hour glass configuration of the interaatrial septum causing obstruction of the superior vena cava

The erroneous denomination “lipomatous hypertrophy of the interaatrial septum” is a benign lesion characterized by an important epicardial fat accumulationin the interaatrial septum. We present a female patient with shortness of breath at great efforts and transthoracic and transesophageal echocardiographydiagnosis of hourglass configuration of the interaatrial septum provoking inflow obstruction of the superior vena cava.