The nurse is reviewing the electrolyte results of a client and notes that the potassium level is 5.7. Which pattern on the cardiac monitor would the nurse expect to see?
ST depression
Tall peaked T waves
Prolonged ST segment
Prominent U wave
The Correct Answer is B
A. ST depression: ST depression is associated with hypokalemia or ischemia.
B. Tall peaked T waves: Hyperkalemia (K+ > 5.0 mEq/L) causes tall, peaked T waves due to abnormal repolarization. Severe hyperkalemia (>6.5 mEq/L) can lead to cardiac arrest.
C. Prolonged ST segment: Not a characteristic of hyperkalemia.
D. Prominent U wave: A U wave is seen in hypokalemia, not hyperkalemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Hypercalcemia: AKI is typically associated with hypocalcemia because the kidneys fail to convert vitamin D to its active form, reducing calcium absorption.
B. Elevated BUN: AKI leads to impaired renal filtration, causing elevated blood urea nitrogen (BUN) and creatinine levels due to the accumulation of nitrogenous waste.
C. Metabolic alkalosis: AKI usually causes metabolic acidosis, not alkalosis, due to the accumulation of acids (e.g., lactic acid, uremic toxins).
D. Hypokalemia: AKI commonly leads to hyperkalemia due to reduced potassium excretion.
Correct Answer is B
Explanation
A. Diarrhea: Diarrhea is not a common side effect of cooling therapy and does not indicate a need to stop treatment.
B. Shivering: Shivering counteracts the cooling effect of the blanket, increasing body temperature and metabolic demand. This indicates the treatment is ineffective and needs adjustment.
C. Hypotension: While cooling can cause vasodilation and lower blood pressure, mild hypotension does not immediately necessitate stopping treatment.
D. Vomiting: Vomiting may be due to fever-related illness but is not a direct indicator that cooling should be stopped.
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