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A nurse is reviewing cardiac rhythms and heart blocks for a critical care course. The nurse is aware that which of the following describes first degree heart block?

The PR interval gets longer then drops.

PR interval greater than 0.20 seconds in duration

There are absent P waves

R-R is irregular

Answer and Explanation

The Correct Answer is B

Rationale:

A. This describes a second-degree heart block, specifically Mobitz Type I (Wenckebach).

B. A PR interval greater than 0.20 seconds is characteristic of first-degree heart block.

C. This describes third-degree heart block, also known as complete heart block.

D. An irregular R-R interval is not specific to first-degree heart block.

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Correct Answer is A

Explanation

Rationale:

A. Tenormin (Atenolol) is a beta-blocker that reduces the heart rate and may affect the results of the stress test. Therefore, it should be held the morning of the test.

B. Heparin is an anticoagulant and is not typically held before a stress test.

C. Keflex (Cephalexin) is an antibiotic and is not typically held before a stress test.

D. Holding all medications is not necessary for a stress test, but specific medications that may interfere with the test, such as beta-blockers, should be held.

A. Anorexia B. Fever C. Dyspnea D. Malaise

Correct Answer is B

Explanation

Rationale:

A. Anorexia is a common symptom of infective endocarditis but is not typically the priority assessment finding.

B. Fever is a hallmark sign of infective endocarditis and should be monitored closely.

C. Dyspnea is a common symptom of infective endocarditis but is not typically the priority assessment finding.

D. Malaise is a common symptom of infective endocarditis but is not typically the priority assessment finding.

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A nurse is reviewing cardiac rhythms and heart blocks for a critical care course. The nurse is aware that which of the following describes first degree heart block?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is A

Explanation

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Correct Answer is B

Explanation

Identify the following Cardiac Rhythm:

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