Editors: Angela Tsiperfal, MS, RN, NP, Electrophysiology, Stanford University Medical Center, Stanford, California. Linda K. Ottoboni, RN, MS, FHRS, CCDS, Arrhythmia Nurse Coordinator, Stanford Hospital and Clinics, Stanford, California. Salwa Beheiry, RN, CCRN, Director of Electrophysiology Services, California Pacific Medical Center, San Francisco, California. Amin Al-Ahmad, MD, FACC, FHRS, Director, Cardiac Electrophysiology Laboratory and Associate Director, Arrhythmia Service, Stanford University Medical Center, Stanford, California. Andrea Natale, MD, FACC, FHRS, Executive Medical Director, Texas Cardiac Arrhythmia Institute, St. David”s Medical Center, Austin, Texas. Paul J. Wang, MD, FACC, FHRS, Professor of Medicine, Director of Cardiac Arrhythmia Service and Cardiac Electrophysiology Laboratory, Stanford University, Stanford, California.