Spontaneous cardiac tamponade due to sternotomy wire suture.

The first case of spontaneous cardiac tamponade caused by wire suture for sternotomy closure is presented. The proper analysis of bloody pericardial fluid, including simultaneous aspirate and venous hematocrit, oxygen content, and coagulation studies, is emphasized. In addition, the causes of acute hemopericardium are reviewed. Spontaneous cardiac tamponade as a potential late complication of cardiac surgery should be considered in the postoperative patient who presents with pericarditis or a sudden change in cardiac status.