['To report problems in the tethering catheter shaft of the Tempofilter, temporary caval filter.', 'Two cases are reported where the tethering catheter shaft of the Tempofilter buckled within the jugular vein.', 'Buckling of the tethering shaft caused cephalic migration of the filter into the right atrium. Both filters were uneventfully removed without adverse sequelae.'] Does buckling of the tethering catheter cause migration of a temporary caval filter to the right atrium?