J. David Burkhardt, MD Department of Cardiovascular Medicine, The Cleveland Clinic Foundation
Bruce L. Wilkoff, MD Director of Cardiac Pacing and Tachyarrhythmia Devices, Department of Cardiovascular Medicine, The Cleveland Clinic Foundation
Address: Bruce L. Wilkoff, MD, Department of Cardiovascular Medicine, F15, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195; e-mail wilkofb@ccf.org
The authors have indicated that they have served as consultants and lecturers for the Guidant, Medtronic, and St. Jude corporations.
Dr. Burkhardt has also received research support from the Guidant and St. Jude corporations.