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.
