Season 3 | Tracing 3

This educational series allows you to analyze a set of cardiac tracings and answer a question posed by Dr. Prystowsky PRIOR to viewing his video explanation and answer.

QUESTION:  Where is the most likely level of AV block?:

  1. AVN
  2. His bundle
  3. Infra-His

Once you've made your selection scroll down for the correct answer.


Season 3 on The Series of Unknown Tracings are presented in partnership of HRS and EP on EP.

To enlarge the tracing, click or tap on the image. Smartphone users can expand the tracing image by rotating their screen.




ANSWER: Watch the short video below for Dr. Eric Prystowsky's answer.

4 min, 28 sec


Last updated: 
08 Apr 2020