Hydatid cyst of the heart located in the interventricular septum.

Cardiac hydatosis is a rare condition, and the localization of a hydatid cyst within the interventricular septum is exceptional. A 61-year-old man found to have a hydatid cyst of the interventricular septum is reported. Presenting manifestations were congestive heart failure and signs suggestive of an aortic valvulopathy. Diagnosis was made by Doppler echocardiography and confirmed by magnetic resonance imaging. The cyst was approached surgically by right ventriculotomy. Despite a technically successful intervention without rupture of the cyst or appearance of a conduction delay, the patient died on the 20th postoperative day because of acute respiratory distress syndrome complicating infectious pneumonia.