There is AV concordance (all QRS have a preceding P wave), but we have intermittent dropped beats consistent with a second degree AV block. The PR-interval of the conducted beats is always the same, so we have Mobitz 2. Progressively lengthening PR-interval prior to a dropped QRS is Mobitz 1 (Wenkebach).
azibirdIf you look closely at the first group of three in V1, the PR interval is definitely lengthening. I must have been overreading and this was too subtle to make it type I. Annoying+
submitted by โbwdc(697)
There is AV concordance (all QRS have a preceding P wave), but we have intermittent dropped beats consistent with a second degree AV block. The PR-interval of the conducted beats is always the same, so we have Mobitz 2. Progressively lengthening PR-interval prior to a dropped QRS is Mobitz 1 (Wenkebach).