Abstract:
Background: It used to believe that systemic thromboembolism in patient with atrial fibrillation occurred because of increment in activation of coagulation cascade leading to hypercoagulable state. Currently, there was no data about hypercoagulable state in Thai patient with atrial fibrillation. Objective: To determine hypercoagulable state in patient with atrial fibrillation using clotting factors and thrombin generation test both in left atrium and femoral vein. Material and Method: This is a case control observational study which enroll patient with and without atrial fibrillation who are scheduled for procedure which involve left atrium. Hypercoagulable state was measured using Fibrinogen, vWF antigen, D-dimer and thrombin generation test in both left atrium and femoral vein. Results: A total of 35 patients were enrolled in this study. 14 patients had atrial fibrillation. We observed a significantly increased in levels of Fibrinogen, vWF antigen and D-dimer in patient with atrial fibrillation both in left atrium and femoral vein. There was no significant different between left atrium and femoral vein. However, thrombin generation test failed to demonstrate difference in hypercoagulable state. Conclusion: There was a hypercoagulable state in patient with atrial fibrillation both in left atrium and femoral vein suggestive of systemic process by measuring levels of Fibrinogen, vWF antigen and D-dimer. However, thrombin generation test could not be used to detect hypercoagulable state in patient with atrial fibrillation.