How are nodoventricular or fasciculoventricular tracts differentiated from Wolff-Parkinson-White (WPW) syndrome?

Updated: Jan 08, 2017
  • Author: Christopher R Ellis, MD, FACC, FHRS; Chief Editor: Mikhael F El-Chami, MD  more...
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Answer

Sometimes, accessory AV fibers connect to the AV node itself or the His bundle or bundle branches and insert into the ventricular myocardium. These are called nodoventricular or fasciculoventricular tracts. Patients with fasciculoventricular connections show a short His-ventricle (HV) interval and no change in the QRS complex during rapid atrial pacing. Fasciculoventricular AV pathways do not participate in clinically meaningful arrhythmias.


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