[Thrombocytopenia induced by heparin and cardiac surgery with extracorporeal circulation]. / Thrombopénie induite par l'héparine et chirurgie cardiaque sous circulation extracorporelle.

A case of mitral and aortic valvular replacement combined with double coronary artery bypass grafting is reported in a 64-year-old woman who presented with a history of heparin-induced thrombocytopenia. The use of a conventional dose of heparin did not induce the formation of a plasma platelet-aggregation factor. The necessity of postoperative anticoagulation was ensured by the prescription of antivitamin K, started on the morning of the operative day.