[Migration of an Antheor filter in the pulmonary artery. A case].

Migration of an Antheor caval filter into the pulmonary artery was observed in a 66-year old male patient referred for multifocal pulmonary embolism in a context of heparin-induced thrombocytopenia. The inferior vena cava was of small diameter (18 mm). The filter was removed under cardio-pulmonary bypass and total heparinization, despite the proven thrombocytopenia. The postoperative period was marked by tamponade which had to be drained. The long-term results were satisfactory. This seems to be the first documented case of Antheor caval filter migration into the cardiac cavities.