Heart Rhythm, the official Journal of the Heart Rhythm Society, the Cardiac Electrophysiology Society, and the Pediatric & Congenital Electrophysiology Society, is a unique journal for fundamental discovery and clinical applicability. Heart Rhythm integrates the entire cardiac electrophysiology (EP) community, from basic and clinical academic researchers to private practitioners, engineers, allied professionals, industry, and trainees, all of whom are vital and interdependent members of our EP community. The Heart Rhythm Society is the international leader in science, education, and advocacy for cardiac arrhythmia professionals and patients and the primary information resource on heart rhythm disorders. Its mission is to improve the care of patients by promoting research, education, and optimal health care policies and standards. The Heart Rhythm Society is the preeminent professional group, representing more than 7,000 specialists in cardiac pacing and electrophysiology from more than 70 countries. The Society is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to sponsor continuing medical education for physicians. For more information on the Heart Rhythm Society, please visit www.HRSonline.org Heart Rhythm has three open access companion titles: Case reports, illustrations, and educational vignettes can be submitted to Heart Rhythm Case Reports. Original clinical and experimental research, review articles, and more can be submitted to Heart Rhythm O2. Original articles focusing on digital health and technology in the field of cardiology can be submitted to the Cardiovascular Digital Health Journal.