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?

R-R is irregular

There are absent P waves

PR interval greater than 0.20 seconds in duration.

The PR interval gets longer then drops.

Answer and Explanation

The Correct Answer is C

A. First-degree heart block has a regular R-R interval, meaning the rhythm is typically regular.
B. The presence of P waves is a distinguishing feature of first-degree heart block. Absent P waves are more characteristic of atrial fibrillation or junctional rhythms.
C. First-degree heart block is characterized by a prolonged PR interval greater than 0.20 seconds, but all impulses are still conducted to the ventricles.
D. A progressively lengthening PR interval followed by a dropped QRS complex is indicative of second-degree Mobitz Type I (Wenckebach) heart block, not first-degree heart block.

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Correct Answer is B

Explanation

A. A weight gain of 1 lb in a week may not indicate fluid overload, but a more rapid increase is concerning.
B. A weight gain of 2 lbs in 24 hours or 5 lbs in a week suggests worsening heart failure due to fluid retention, requiring immediate provider notification.
C. Daily weights should be taken at the same time each day, preferably in the morning, after urination and before eating, for accurate monitoring.
D. Skipping a diuretic dose can lead to fluid retention and worsening symptoms, so adherence to the medication regimen is crucial.

A. Pruritus B. Petechiae C. Confusion D. Slowing pulse rate

Correct Answer is B

Explanation

A. Pruritus is not a common side effect of heparin therapy. While allergic reactions can occur, they are not the primary concern.
B. Petechiae are a sign of bleeding, which is a major side effect of heparin therapy. Heparin increases the risk of bleeding by inhibiting clot formation, and petechiae may indicate early signs of hemorrhage.
C. Confusion is not directly associated with heparin therapy unless it results from severe bleeding leading to hypoxia or shock.
D. A slowing pulse rate is not a known adverse effect of heparin. Instead, monitoring for signs of bleeding, such as bruising, hematuria, and petechiae, is the priority.

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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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