A 73 year old woman with dizziness.
2 to 1 AV block
- every other P wave is conducted to the ventricles
- 2 to 1 AV block starts after the 5th QRS in this 3 channel recording. The first non-conducted P wave is indicated with an arrow.
- the PR interval of conducted P waves is constant
- 2 to 1 AV block cannot be classified into Mobitz type I or II as we do not know if the 2nd P wave would be conducted with the same or longer PR interval.