1 Department of Anesthesiology, Pain Medicine, and Critical Care Medicine, The Massachusetts General Hospital, Harvard Medical School, Boston, MA.
2 Department of Anesthesiology, Pain Medicine, and Critical Care Medicine, The Massachusetts General Hospital, Harvard Medical School, Boston, MA; Division of Cardiac Surgical Intensive Care Unit, The Massachusetts General Hospital, Harvard Medical School, Boston, MA.
3 Department of Cardiology, Division of Electrophysiology, The Massachusetts General Hospital, Harvard Medical School, Boston, MA.
4 Department of Anesthesiology, Pain Medicine, and Critical Care Medicine, The Massachusetts General Hospital, Harvard Medical School, Boston, MA. Electronic address: [email protected].