Answer - Case of the month (Feb 2012)

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ECG 1:

ECG 2:

Q: This narrow complex rhythm shows an early beat after every three beats (group formation), which continued on a longer registration. What is you diagnosis?

A. Type 1 second degree AV block

B. Type 2 second degree AV block

C. Third degree AV block

D. Competition between sinus rhythm and nodal rhythm. No second or third degree AV block.

E. Escape capture bigemini

Correct answer: C. Third degree av block because we said so !!!