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CMC Cardiac Medicine Certification

Category - CMC

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A patient with MI is admitted in the coronary care unit. The patient was placed on cardiac monitor and he is not experiencing any chest pain at this time. The nurse reviews the ECG rhythm and notes that the P-R interval is 0.12 seconds. This rhythm would indicate:

Junctional rhythm
Normal rhythm
First-degree AV block
An abnormal finding

Explanation

Answer- B - This rhythm indicates normal rhythm. The normal PR interval range 0.12 - 0.2 seconds. Therefore the finding is normal.

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