1 Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH.
2 Department of Cardiology, Manning Base Hospital, Taree, New South Wales, Australia.
3 Division of Cardiovascular and Thoracic Anesthesiology, Department of Anesthesia and Perioperative Medicine, Mayo Clinic, Rochester, MN. Electronic address: Ramakrishna.harish@mayo.edu.