The PR Interval of a First-Degree AV Block _____

question 27

Multiple Choice

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

• A) is constant and less than 0.12 second in duration
• B) is constant and more than 0.20 second 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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