Abdessamad Abdou,A. Boulahya,Oussama Almaghraoui,R. Ezzahraoui,M. Alaoui, Pericardial Hydatic Cyst: An Unusual Cause of Heart Failure European Journal of Cardiovascular Research 2020 http://dx.doi.org/10.31487/j.EJCR.2020.01.01 https://www.sciencerepository.org/pericardial-hydatic-cyst-an-unusual-cause-of-heart-failure_EJCR-2020-1-101 Abstract: Pericardial hydatic cyst is rare even in endemic countries. We report a case of 69-year-old man with isolated pericardial hydatid cyst that presented an overall heart failure. Tran thoracic echocardiography and computed tomography are revealed the pericardial cystic mass. Surgical cystectomy was realized without cardiopulmonary bypass. In post-operative the patient received albendazole. He remained asymptomatic without recurrence during 18 months follow-up period.Keywords: Pericardial, hydatid cyst, echinococcosis, cystectomy