Which findings on EPS increase the risk of sudden cardiac death in patients with Wolff-Parkinson-White (WPW) syndrome?

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

If AF is induced during either an intraesophageal or an EPS, the shortest RR interval between two consecutive preexcited QRSs is measured. If the interval is less than 220 ms, then the risk of sudden death due to VF is believed to be high. Specifically, according to one study, the most discriminating predictor of VF in patients with WPW syndrome was the shortest RR interval during AF of 172 ± 23 ms (vs 230 ± 50 ms). [23] Those patients were considered to be at high risk for developing VF and sudden death should AF occur.


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!