What are the limitations of algorithms to predict the location of the AP 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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Several algorithms are available to predict the location of the AP. These algorithms may not be totally accurate because maximal preexcitation is needed, and usually the QRS in WPW pattern is a fusion between AV node and AP depolarization (ie, absent AP depolarization may be present at certain points due to enhanced AV node conduction, although the AP is present), precordial lead placement may vary, as well as chest shape and size and heart shape, size, and location.

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