1993;87:866 73. 254. Pappone C, Vicedomini G, Manguso F, et al. Wolff-Parkinson-White syndrome in the era of catheter ablation: insights from a registry study of 2169 patients. Circulation. 2014;130:811 9. 255. Timmermans C, Smeets JL, Rodriguez LM, et al. Aborted sud- den death in the Wolff-Parkinson-White syndrome. Am J Cardiol. 1995;76:492 4. 256. Klein GJ, Bashore TM, Sellers TD, et al. Ventricular fibrillation in the Wolff-Parkinson-White syndrome. N Engl J Med. 1979;301:1080 5. 257. Bromberg BI, Lindsay BD, Cain ME, et al. Impact of clinical history and electrophysiologic characterization of accessory pathways on man- agement strategies to reduce sudden death among children with Wolff- Parkinson-White syndrome. J Am Coll Cardiol. 1996;27:690 5. 258. Santinelli V, Radinovic A, Manguso F, et al. The natural history of asymptomatic ventricular pre-excitation: a long-term prospective follow-up study of 184 asymptomatic children. J Am Coll Cardiol. 2009;53:275 80. 259. Smith GD, Dyson K, Taylor D, et al. Effectiveness of the Valsalva manoeuvre for reversion of supraventricular tachycardia. Cochrane Database Syst Rev. 2013;3:CD009502. 260. Delaney B, Loy J, Kelly A-M. The relative efficacy of adenosine versus verapamil for the treatment of stable paroxysmal supraventricular tachy- cardia in adults: a meta-analysis. Eur J Emerg Med. 2011;18:148 52. 261. Furlong R, Gerhardt RT, Farber P, et al. Intravenous adenosine as first-line prehospital management of narrow-complex tachycardias by EMS personnel without direct physician control. Am J Emerg Med. 1995;13:383 8. 262. Schatz I, Ordog GJ, Karody R, et al. Wolff-Parkinson-White syndrome presenting in atrial fibrillation. Ann Emerg Med. 1987;16:574 8. 263. Mittal S, Ayati S, Stein KM, et al. Transthoracic cardioversion of atrial fibrillation: comparison of rectilinear biphasic versus damped sine wave monophasic shocks. Circulation. 2000;101:1282 7. 264. Glatter KA, Dorostkar PC, Yang Y, et al. Electrophysiological ef- fects of ibutilide in patients with accessory pathways. Circulation. 2001;104:1933 9. 