1 Section of Cardiac Pacing and Electrophysiology, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio, USA. Electronic address: waznio@ccf.org.
2 Section of Cardiac Pacing and Electrophysiology, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio, USA.
3 Section of Cardiac Pacing and Electrophysiology, Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio, USA. Electronic address: https://twitter.com/aymanhusseinmd.