Which noninvasive markers are used for risk stratification in 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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Despite the importance of risk stratification with electrophysiologic study (EPS) to assess the risk of sudden cardiac death (SCD), few reliable noninvasive markers are known. The adult literature has focused on preexcited RR intervals in atrial fibrillation (AF) as an indicator of the ability to rapidly conduct. In a series of 60 pediatric patients, a preexcited RR interval of less than 220 ms identified patients at high risk for cardiac arrest. [22] Thus, if an AP can conduct 4 impulses per second, it can be considered a high-risk pathway.

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