2007;115:350 3. 245. Langberg JJ, Leon A, Borganelli M, et al. A randomized, prospective comparison of anterior and posterior approaches to radiofrequency cath- eter ablation of atrioventricular nodal reentry tachycardia. Circulation. 1993;87:1551 6. 246. Kalbfleisch SJ, Strickberger SA, Williamson B, et al. Randomized com- parison of anatomic and electrogram mapping approaches to ablation of the slow pathway of atrioventricular node reentrant tachycardia. J Am Coll Cardiol. 1994;23:716 23. 247. Kay GN, Epstein AE, Dailey SM, et al. Selective radiofrequency ablation of the slow pathway for the treatment of atrioventricular nodal reentrant tachycardia. Evidence for involvement of perinodal myocardium within the reentrant circuit. Circulation. 1992;85:1675 88. 248. Bogun F, Knight B, Weiss R, et al. Slow pathway ablation in patients with documented but noninducible paroxysmal supraventricular tachy- cardia. J Am Coll Cardiol. 1996;28:1000 4. 249. O Hara GE, Philippon F, Champagne J, et al. Catheter ablation for car- diac arrhythmias: a 14-year experience with 5330 consecutive patients at the Quebec Heart Institute, Laval Hospital. Can J Cardiol. 2007;23 Suppl B:67B 70B. 250. Gambhir DS, Bhargava M, Arora R, et al. Electrophysiologic effects and therapeutic efficacy of intravenous flecainide for termination of paroxys- mal supraventricular tachycardia. Indian Heart J. 1995;47:237 43. 251. Musto B, Cavallaro C, Musto A, et al. Flecainide single oral dose for management of paroxysmal supraventricular tachycardia in children and young adults. Am Heart J. 1992;124:110 5. 252. Wellens HJ. Should catheter ablation be performed in asymptomatic pa- tients with Wolff-Parkinson-White syndrome? When to perform catheter ablation in asymptomatic patients with a Wolff-Parkinson-White electro- cardiogram. Circulation. 2005;112:2201 7. 253. Munger TM, Packer DL, Hammill SC, et al. A population study of the natural history of Wolff-Parkinson-White syndrome in Olmsted County, Minnesota, 1953 1989. Circulation. 1993;87:866 73. 254. Pappone C, Vicedomini G, Manguso F, et al. 