This ECG was obtained from a patient in a walk-in health clinic. We do not have any other information on the patient. We thank Joe Kelly for donating this interesting ECG to the GURU.
Second-degree AV Block Type I
This ECG is a follow-up to last week's ECG of the WEEK, which presented an AVB that was mostly conducted 2:1, and proved to be a "Type II" block when it conducted 3:2 with consistent PR intervals at the end. We often just use the term, "2:1 AVB", rather than try to discern the Mobitz type, realizing that the most important feature of a 2:1 block may be that it automatically cuts the heartrate in half.
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