The finding of an extremely mobile thrombus in a patent foramen ovale
(i.e., transit thrombus) without arterial embolism is rare. In our cas
e-report diagnosis was made by routine-echocardiography. Clinically no
napparent deep vein thrombosis was documented by phlebography and was
thought to be the origin of the embolus. After implantation of a caval
filter device cardiac surgery was performed and the embolus was remov
ed without complications.