[Cardiac tamponade in a woman with primary hypothyroidism].

Pericardial effusion is not infrequent as a manifestation of hypothyroidism, however, cardiac tamponade is exceptional in these patients. We report a case of a female patient with cardiac tamponade that in the forward workshop was diagnosed of primary hypothyroidism. A brief presentation of clinical history is reported. The literature's review emphasizes the rarity of this case, the importance of the knowledge of triggering factors to establish a precious diagnosis and satisfactory clinical evolution with hormonal treatment without recurrences of the cardiac tamponade after pericardiocentesis is performed, although the resolution of the pericardial effusion is usually slow.