Left ventricular aneurysmectomy in patients with mobile, protruding thrombi is associated with increased risk of neurological complications due to loss during left ventricular luxation or embolisation of residual thrombotic material after incomplete removal. Embolisation can be prevented by application of an intra-aortic filter device. Here, we report on a case involving an important left ventricular thrombus captured in a patient referred for coronary artery bypass grafting, left ventricular aneurysmectomy, and thrombectomy.