[Coronary Artery Bypass Grafting in a Patient with Hemophilia A Assisted by Thromboelastography: Report of a Case].

We report a case of coronary artery bypass grafting using thromboelastography in a 42-year-old male patient with hemophilia A. He was diagnosed with hemophilia A at the age of three years old, and was also infected with hepatitis C and human immunodeficiency virus (HIV). He complained of chest pain at home and was brought to our institute and diagnosed with acute myocardial infarction. Concerned about the risk of bleeding, coronary artery bypass grafting was selected to avoid permanent administration of antiplatelet agents. Although there were concerns about bleeding caused by various coagulation factor abnormalities due to the use of cardiopulmonary bypass, we could accurately assess the coagulation factors by using thromboelastography and replenishing them in appropriate amounts. The operation was performed safely as usual and successfully finished.