Keywords: ACC/AHA Clinical Practice Guidelines; Valsalva maneuver; Wolff-Parkinson-White syndrome; accessory atrioventricular bundle; anti-arrhythmia agents; atrial flutter; atrioventricular nodal reentry; cardiac; catheter ablation; congenital; death; ectopic atrial; ectopic junctional; electric countershock; electrophysiologic techniques; heart defects; reciprocating; sinus tachycardia; sudden; supraventricular; tachycardia.