A very late and persistent thrombosis after left atrial appendage occlusion

Atrial fibrillation (AF) is the most common cardiac arrhythmia and ischemic stroke represents the most important complication. When the oral anticoagulation cannot be taken due to bleeding problems and considerations, the percutaneous occlusion of the left atrial appendage (LAA) is a possible solution. We present a case of a very late thrombosis of the LAA-Occluder device. The thrombus was diagnosed only after the patient suffered a stroke and a regression could not be achieved, neither with apixaban nor with warfarin alone. A successful result could be observed with the combination of high dose warfarin with aspirin 100mg/day. The possible etiology of this rare complication is an incomplete endothelialization of the device.