Abstract
Hydatid disease is an indolent parasitic infection by a microorganism, echinococcosis granulosis. The disease can infect almost any human organ but is exceedingly rare involving the mediastinum and the heart. It can be lethal if complications occur. CT scan is the modality of choice for the diagnosis of the disease. The coverage of cardiac structures in the abdominal CT scan survey may be helpful for the detection of possible cardio-mediastinal hydatid disease. The authors present a case of hydatid cyst in the left ventricular wall alongside hepatic hydatid cysts. The definitive treatment includes surgery under cardiopulmonary bypass and needs to be treated as soon as it is diagnosed to prevent lethal complications.