McGill Case 274

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This case report is kindly provided by Michael Rosengarten from McGill and is part of the McGill Cases. These cases come from the McGill EKG World Encyclopedia.

Previous Case: McGill Case 173 | Next Case: McGill Case 275

These two strips from the same patient show a 2:1 block on the top tracing and a Mobitz II A/V block on the lower one. Note that with 2:1 block you can not tell if this is a Mobitz I or II. Mobitz II is seen below as the PR does not change before and after the non-conducted P wave.