Key search words included but were not limited to the following: abla- tion therapy (catheter and radiofrequency; fast and slow pathway), accessory pathway (manifest and concealed), antiarrhythmic drugs, atrial fibrillation, atrial tachycardia, atrioventricular nodal reentrant (reentry, reciprocating) tachycardia, atrioventricular reentrant (reentry, reciprocat- ing) tachycardia, beta blockers, calcium channel blockers, cardiac imaging, cardioversion, cost effectiveness, cryother- apy, echocardiography, elderly (aged and older), focal atrial tachycardia, Holter monitor, inappropriate sinus tachycardia, Page et al 2015 ACC/AHA/HRS SVT Guideline e509 junctional tachycardia, multifocal atrial tachycardia, parox- ysmal supraventricular tachycardia, permanent form of junc- tional reciprocating tachycardia, pre-excitation, pregnancy, quality of life, sinoatrial node, sinus node reentry, sinus tachycardia, supraventricular tachycardia, supraventricular arrhythmia, tachycardia, tachyarrhythmia, vagal maneuvers (Valsalva maneuver), and Wolff-Parkinson-White syndrome. Additionally, the GWC reviewed documents related to supra- ventricular tachycardia (SVT) previously published by the ACC, AHA, and Heart Rhythm Society (HRS). References selected and published in this document are representative and not all-inclusive. An independent ERC was commissioned to perform a systematic review of key clinical questions, the results of which were considered by the GWC for incorporation into this guideline. The systematic review report on the management of asymptomatic patients with Wolff-Parkinson-White (WPW) syndrome is published in conjunction with this guideline.9 Table 1. Applying Class of Recommendation and Level of Evidence to Clinical Strategies, Interventions, Treatments, or Diagnostic Testing in Patient Care* 1.2. Organization of the GWC The GWC consisted of clinicians, cardiologists, electrophysi- ologists (including those specialized in pediatrics), and a nurse (in the role of patient representative) and included representa- tives from the ACC, AHA, and HRS. 1.3. Document Review and Approval This document was reviewed by 8 official reviewers nomi- nated by the ACC, AHA, and HRS, and 25 individual content reviewers. 