Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 10 1 2015 03 15 128 131 EN Freidoun Sabzi Dept. of Cardiovascular Surgery, Imam Ali Heart Center, Kermanshah University of Medical Sciences, Iran. Hamid Madani Dept. of Pathology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran. Donya Khosravi Dept. of Gynecology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Maryam Sadat Hosseini Dept. of Gynecology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Reza Faraji Dept. of Cardiovascular Surgery, Imam Ali Heart Center, Kermanshah University of Medical Sciences, Iran. 2015 10 14   A 47-year-old man presented as a dyspnea and fatigue. A transthoracic echocardi-ography (TTE) performed to assess valvar heart disease and left ventricular (LV) function showed a large hydatid cysts in the inter ventricular septum bulging to posterior of heart and compressing its overlying muscle as whitish round mass. The patient underwent elective surgery by evacuation of septal hydatid cysts from posterior inter ventricular aspect of septum and capitonnage of cavity. His postop-erative course was uneventful. Post-operative albendazole for prophylaxis of pro-cedures were recommended. The patient was scheduled for regular follow-up, to check for any recurrences or late complications. https://ijpa.tums.ac.ir/index.php/ijpa/article/view/342 https://ijpa.tums.ac.ir/index.php/ijpa/article/download/342/433