How are negative delta waves used to locate 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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Answer

A practical concept is that a negative delta wave usually signals the location of the AP, as follows:

  • A negative delta wave in a left-side lead such as I and aVL indicates a left-side AP
  • A negative delta in a right-side lead such as V1 predicts a right-side AP
  • An isoelectric delta in V1 predicts an anteroseptal AP
  • A negative delta in the inferior leads (II, III, and aVF) indicates a posteroseptal AP
  • A positive delta in the inferior leads predicts an anteroseptal AP

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