A nurse is reviewing the lab results and electrocardiogram (ECG) of a patient with End Stage Renal Disease (ESRD). The nurse correlates which ECG finding to a potassium level of 6.8?
Prolonged PR interval
Presence of a U wave
Peaked T waves
Elevated ST segment
The Correct Answer is C
A. A prolonged PR interval can be seen in hyperkalemia but is not as characteristic as peaked T waves.
B. A U wave is typically seen in hypokalemia, not hyperkalemia.
C. Peaked T waves are a hallmark ECG finding in hyperkalemia and occur due to increased repolarization speed.
D. ST segment elevation is more commonly associated with myocardial infarction rather than hyperkalemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Taking a diuretic before bed can lead to nocturia and disrupt sleep. It is usually recommended to take it in the morning.
B. Daily weight tracking helps detect fluid retention, a key indicator of worsening heart failure. A weight gain of 2 lbs in 24 hours or 5 lbs in a week should be reported to the provider.
C. NSAIDs (e.g., naproxen) should be avoided as they can cause fluid retention and worsen heart failure.
D. Sodium intake should be limited to 2 grams (2000 mg) per day, not 4 grams, to help prevent fluid overload.
Correct Answer is C
Explanation
A. Holding all medications is not necessary; only certain medications that affect heart rate or blood pressure are held.
B. Keflex (Cephalexin) is an antibiotic and does not affect stress test results, so it should not be held.
C. Tenormin (Atenolol) is a beta-blocker that reduces heart rate and can interfere with the stress test by blunting the expected heart rate response. Beta-blockers are typically held before an exercise stress test.
D. Heparin is an anticoagulant and does not impact the stress test results.
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