URMC / Encyclopedia / Collection Arrhythmias Arrhythmias Atrial Fibrillation Atrial Flutter FAQs About Pacemakers and Implantable Cardioverter Defibrillators (ICDs) Heart Block Living with a Pacemaker or Implantable Cardioverter Defibrillator (ICD) Long QT Syndrome Overview of Pacemakers and Implantable Cardioverter Defibrillators (ICDs) Sick Sinus Syndrome Ventricular Fibrillation Ventricular Tachycardia (VT) Wolff-Parkinson-White Syndrome Automated External Defibrillator