Ashley E. Burch, PhD Assistant Professor, Department of Cardiovascular Sciences, East Carolina University, Greenville, North Carolina.

Byron J. Colley, MD Cardiologist, Jackson Heart Clinic, Mississippi.

Michael Döring, MD Cardiologist, Leipzig Heart Centre, University of Leipzig, Germany.

Siva Gummadi, MD Cardiologist, CVI of Central Florida, Ocala.

Christian Perings, MD, PhD Cardiologist, Katholisches Klinikum Lunen, Germany.

Michael Robertson, NP Nurse Practitioner, Trinity Medical, WNY, Buffalo, New York.

Robert Sanchez, MD Cardiologist, The Heart Institute, St Petersburg, Florida.

Girish Shroff, MD Cardiologist, Baptist Heart Specialists, Jacksonville, Florida.

Christian Veltmann, MD, PhD Cardiologist, Medizinische Hochschule Hannover, Germany.

Samuel F. Sears, PhD Professor, Department of Cardiovascular Sciences, East Carolina University, Greenville, North Carolina.

This research project was funded by ZOLL Medical.

Dr Sears reports grants from ZOLL Medical and personal fees from Medtronic, Abbott, and Milestone Pharm. Dr Döring reports grants from Abbott, Biotronik, Boston Scientific, and Medtronic. Dr Sanchez reports ZOLL Medical: Honoraria for speaker's bureau. Dr Veltmann reports personal fees from ZOLL Medical. Dr Burch reports research grants from ZOLL Medical. The other authors report no disclosures.

Correspondence Ashley E. Burch, PhD, East Carolina University, 4340 Health Sciences Bldg, Greenville, NC 27858 ([email protected]).