Second Degree Type I – Wenckebach

Lead II

 

12-Lead

 

Interpretation Rules

  • Progressive prolongation of the PR interval culminating in a non-conducted P wave
  • The PR interval is longest immediately before the dropped beat
  • The PR interval is shortest immediately after the dropped beat
  • The P-P interval remains relatively constant
  • The greatest increase in PR interval duration is typically between the first and second beats of the cycle.
  • The RR interval progressively shortens with each beat of the cycle.
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