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Updated: Mar 10, 2026

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

Published on: February 26, 2013

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Left Atrial Appendage Thrombus Resolution with Reduced Dose Apixaban

Beatriz Vaquerizo1, Magdi Sami1

  • 1Division of Cardiology, McGill University Health Centre, Montreal, Quebec, Canada.

Journal of Atrial Fibrillation
|December 14, 2016
PubMed

A 63 year old woman with a history of persistent atrial fibrillation and CHADSVASC score of 2, suffered a massive stroke with a hemorrhagic transformation, 2 days following an appendectomy and reversal of warfarin anticoagulation with vitamin K. A left atrial appendage occlusive device (LAAOD) was considered for stroke prevention given the risk of recurrent cerebral hemorrhage. A transesophageal echocardiography (TEE) however, revealed left atrial appendage (LAA) clots which precluded the use of a LAAOD. A computed tomography revealed only partial resolution of the right hemispheric hematoma. Apixaban 2.5 mg twice daily was successful in resolving the LAA clots within 2 months without aggravating her cerebral hematoma which continued to resolve. This is the first case, to our knowledge showing reduced-dose Apixaban to completely resolve left atrial thrombus. Our case also addresses the issue of bridging following reversal of warfarin anticoagulation with vitamin K.

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