[Thrombus entrapped in the foramen ovale in an 80-year-old woman with chronic pulmonary embolism manifested by recurrent syncope--a case report].

We present a case of an 80-year-old female admitted to hospital because of recurrent syncope. The echocardiogram revealed a large thrombus in the left and right atria, entrapped in the patent foramen ovale, right heart enlargement and pulmonary hypertension. Magnetic resonance confirmed significant pulmonary embolism. The patient was successfully treated with fractioned heparin.