Short QT and atrial fibrillation: A KCNQ1 mutation–specific disease. Late follow-up in three unrelated children

Georgia Sarquella-Brugada, MD, Oscar Campuzano, PhD, Anna Iglesias, MSc, Josefina Grueso, MD, PhD, David J. Bradley, MD, Gunter Kerst, MD, PhD, Daniel Shmorhun, MD, PhD, Josep Brugada, MD, PhD, Ramon Brugada, MD, PhD From the Pediatric Arrhythmia Unit, Cardiology Service, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain, Cardiovascular Genetics Center, University of Girona-IDIBGI, Girona, Spain, Department Medical Sciences, School of Medicine, University of Girona, Girona, Spain, Hospital Virgen del Rocío, Universidad de Sevilla, Sevilla, Spain, Section of Cardiology, Department of Pediatrics, MOTT Children’s Hospital, University of Michigan, Ann Arbor, Michigan, Pediatric Cardiology Department, University of Tuebingen, Tuebingen, Germany, Pediatric Electrophysiology Service, Walter Reed National Military Medical Center, Bethesda, Maryland, Arrhythmia Section, Cardiology Service, Thorax Insitute, Hospital Clínic, University of Barcelona, Barcelona, Spain, and Cardiology Service, Hospital Josep Trueta, Girona, Spain.