[Migration of the Kimray-Greenfield filter when inserting it]

Authors have reported a case of the migration of the Kimray-Greenfield filter to the right ventricle immediately after its release in the inferior vena cava. The delay in the spreading out of the filter seems to have been caused by its insertion into a coagulum formed in the socket guiding in through. This incident often encountered in pulmonary thromboembolism and caused by blood hypercoagulability, justifies higher precautions when inserting the filter.