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The PR Interval of a First-Degree AV Block _____

Question 33

Multiple Choice

The PR interval of a first-degree AV block _____.


A) is constant and less than 0.12 seconds in duration
B) is constant and more than 0.20 seconds in duration
C) is generally progressive until a P wave appears without a QRS complex
D) gradually decreases in duration until a P wave appears without a QRS complex

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