In First-Degree Atrioventricular Block, How Does the PR Interval Appear

question 27

Multiple Choice

In first-degree atrioventricular block, how does the PR interval appear on an ECG tracing?

• A)It is prolonged and measures more than 0.20 seconds.
• B)It becomes progressively longer until a QRS complex is dropped.
• C)It is irregular because of nonconducted impulses.
• D)It is usually within normal limits.

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