title: Perfecting the imperfect.
authors.forename: D A
authors.initials: DA
authors.lastname: MacGregor
authors.forename: R L
authors.initials: RL
authors.lastname: Royster
mesh_terms: D002302:Cardiac Output; D006348:Cardiac Surgical Procedures; D016638:Critical Illness; D017097:Electric Impedance; D004562:Electrocardiography / Q000379:methods; D006801:Humans; D007362:Intensive Care Units; D008991:Monitoring, Physiologic / Q000379:methods*; D010092:Oximetry; D013815:Thermodilution / Q000379:methods