Many clinicians have faced the misadventures associated with placing a transvenous pacing wire. Temporary transvenous cardiac pacing is a potentially lifesaving intervention used primarily to correct profound bradycardia. A transvenous pacing wire is typically placed through a 6 French Cordis catheter. If the patient does not have a Cordis catheter in place, the temptation is to break open the closest kit that contains a Cordis and proceed to gain central access. However, this is usually a mistake; usually, the closest kit that contains a Cordis is one for inserting pulmonary artery catheters. Invariably these have Cordis catheters that are 7.5F—that is, catheters that are too big to insert a transvenous pacing wire through. Similarly, if the patient already has a Cordis in place, it is almost always a 7.5F catheter.