This is a retrospective cohort study of consecutive patients receiving suture-mediated closure of the femoral vein following catheterization. All patients undergoing cardiac or arterial catheterization by the Interventional Cardiovascular Medicine Service at The Brigham and Women's hospital from 3/1/02 to the onset of the study and who had femoral venous access during that time were considered for closure of the venous site; however, the decision to use the closure device was left to the discretion of the physician. Contraindications to using the closure device include a groin hematoma that had developed during the procedure and/or difficult access due to extensive scar tissue from surgery or multiple prior vascular accesses.