Formation of Intracardiac Thrombus During Cardiopulmonary Bypass Despite Full Heparinization and Adequate Activated Clotting Time: A Case Report

We reports a case of a newly formed thrombus in the left atrial appendage during cardiopulmonary bypass detected by transesophageal echocardiography in a patient with chronic atrial fibrillation and mitral stenosis. This case alerts the anesthesiologists of possible thrombus formation despite full heparinization during cardiac surgery and the importance of a comprehensive echocardiography examination.