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A nurse is assessing an ECG rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 second. The overall heart rate is 60 beats/min. The nurse assesses the cardiac rhythm as:

A.

Sick sinus syndrome

B.

Normal sinus rhythm

C.

Sinus bradycardia

D.

First degree heart block

Answer and Explanation

The Correct Answer is B

A. Sick sinus syndrome – This involves an abnormal SA node function, often with varying rhythm disturbances (e.g., sinus pauses, bradycardia-tachycardia). The strip described is regular and does not reflect these changes.
B. Normal sinus rhythm – The rhythm is regular, the PR interval is within normal limits (0.12–0.20 seconds), the heart rate is 60 beats/min (within the normal range of 60–100), and P waves precede each QRS complex consistently.
C. Sinus bradycardia – Although the rate is 60, which is at the low end of normal, it is not below 60. Bradycardia is defined as <60 bpm.
D. First-degree heart block – First-degree AV block is characterized by a prolonged PR interval >0.20 seconds. The PR interval here is 0.16 seconds, which is normal.


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Related Questions

Correct Answer is D

Explanation

A. Sepsis is a general systemic infection that can arise from many sources but is not the specific concern addressed by prophylactic antibiotics in valve replacement patients.
B. Otitis media (middle ear infection) is unrelated to dental or surgical procedures and not a concern in valve replacement clients.
C. Deep vein thrombosis (DVT) is prevented with anticoagulants and mobility, not antibiotics.
D. Bacterial endocarditis is a serious infection of the heart's inner lining or valves. Clients with valve replacements are at increased risk, especially during procedures like dental work that may introduce bacteria into the bloodstream. Antibiotic prophylaxis is essential to prevent this potentially life-threatening condition.

Correct Answer is D

Explanation

A. Taking a diuretic before sleep can lead to nocturia (frequent urination at night), disrupting sleep. Also, fluid intake may need to be restricted, not encouraged.
B. Clients with heart failure are usually advised to limit sodium to 2 grams or less per day, not 4 grams, to help reduce fluid retention.
C. Naproxen (a NSAID) is not recommended for clients with heart failure as it can cause fluid retention and worsen the condition.
D. Slowing down when tired after exercise shows an understanding of energy conservation and pacing—appropriate for managing heart failure symptoms. This indicates that teaching was effective.

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