[Cardiac tamponade caused by hydatid pericarditis].

We present the case of a woman with no previous clinical history of disease, that debuted with acute heart failure with symptoms of cardiac tamponade from hydatic pericarditis as a result of a fistula across the diaphragm secondary to a hydatidic cyst rupture in the liver. Cardiac hydatidosis is rare with an incidence in some series between 0.2-2% in humans infested with Echinococcus, affectation of the pericardia being rare. For this reason we present a revision of its pathogenesis, clinical presentation, diagnosis and recommended treatment.