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Ann Thorac Surg 2006;81:2308-2310
© 2006 The Society of Thoracic Surgeons
a Department of Anesthesiology, Virginia Commonwealth University Medical Center, Richmond, Virginia, USA
b Division of Cardiothoracic Surgery, Virginia Commonwealth University Medical Center, Richmond, Virginia
Accepted for publication August 22, 2005.
* Address correspondence to Dr Cain, Virginia Commonwealth University Medical Center, Department of Anesthesiology, 1200 E Broad St, Box 980695, Richmond, VA 23298-0695 (Email: rebeccs13{at}aol.com).
Unfractionated heparin has been a near universal anticoagulant for cardiac surgery; however it is contraindicated in heparin-induced thrombocytopenia type II. Alternative anticoagulants such as bivalirudin (a direct thrombin inhibitor) are being utilized. Bivalirudin was successfully used in an immunologically complex patient (diagnoses of heparin-induced thrombocytopenia type II, systemic lupus erythematosus, antiphospholipid syndrome, and dialysis-dependent renal failure) requiring cardiopulmonary bypass. Thrombotic events are common in antiphospholipid syndrome patients undergoing cardiac surgery utilizing high-dose heparin. This may represent unrecognized heparin-induced thrombocytopenia type II. Our patient did not experience perioperative thrombotic or bleeding complications. The possible cross-reactivity between heparin induced thrombocytopenia type II and antiphospholipid syndrome has not been investigated.
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