1 Department of Anesthesiology, Baylor College of Medicine, Houston, Texas; Division of Cardiovascular Anesthesiology, Texas Heart Institute, Baylor St. Luke's Medical Center, 6720 Bertner Ave, Houston, TX 77030. Electronic address: wpan@texasheart.org.
2 Department of Anesthesiology, Baylor College of Medicine, Houston, Texas.
3 Department of Anesthesiology, Baylor College of Medicine, Houston, Texas; Division of Cardiovascular Anesthesiology, Texas Heart Institute, Baylor St. Luke's Medical Center, Houston, Texas.