ABSTRACT
Fast pathway ablation In the common form of typical AVNRT, anterograde conduction occurs through the slow AV nodal pathway, typically localized along the tricuspid annulus just anterior to the coronary sinus (CS) os, while retrograde conduction occurs through the fast pathway localized more superiorly along the mid to anterior part of the septum. Earlier attempts at ablation targeted the fast AV nodal pathway,1,2 proved to be effective in 80-90% of patients. However, the risk of complete AV block ranged up to 22% due to its close proximity to the compact AV node.
