Nodo- and fasciculoventricular pathways: Electrophysiological features and a proposed diagnostic algorithm for preexcitation variants

Fasciculoventricular and nodoventricular pathways (FVP and NVP) are uncommon preexcitation variants that can be misleading during electrophysiology studies (EPSs), and differentiating them could be challenging. 1 Sternick E.B. Gerken L.M. Vrandecic M.O. Wellens H.J. Fasciculoventricular pathways: clinical and electrophysiologic characteristics of a variant of preexcitation. J Cardiovasc Electrophysiol. 2003; 14: 1057-1063 Crossref PubMed Scopus (69) Google Scholar , 2 Lau E.W. Infraatrial supraventricular tachycardias: mechanisms, diagnosis, and management. Pacing Clin Electrophysiol. 2008; 31: 490-498 Crossref PubMed Scopus (13) Google Scholar , 3 Hoffmayer K.S. Lee B.K. Vedantham V. Bhimani A.A. Cakulev I.T. Mackall J.A. Sahadevan J. Rho R.W. Scheinman M.M. Variable clinical features and ablation of manifest nodofascicular/ventricular pathways. Circ Arrhythm Electrophysiol. 2015; 8: 117-127 Crossref PubMed Scopus (30) Google Scholar In this article, we describe 2 representative cases and then we present various electrophysiological features and phenomenon encountered in patients with these particular accessory pathways (APs).