Cardiac tamponade is a life-threatening complication after cardiac sur
gery which may develop in the early or late postoperative period. The
latest have been defined arbitrarily as the ones ocurring after the 7t
h postoperative day. They are less common than the early ones and most
of the cases have been reported up to six months after the operation.
They usually determine diagnostic difficulties that can negatively in
fluence the prognosis. Because of its atypical late appearance, a case
of a 65 year old man is presented who developed a postpericardiotomy
syndrome and subsequently a pericardial clot nearly two years after ao
rtocoronary bypass grafting.