Electrolyte Disorders USMLE Step 1 Practice Question
A 70-year-old woman with heart failure is admitted for dyspnea and volume overload. She is treated aggressively with intravenous loop diuretics. On hospital day 3, she reports muscle cramps and weakness. ECG shows flattened T waves and prominent U waves. Which of the following electrolyte abnormalities is the most likely cause of these findings?
Answer choices
- AHyperphosphatemia
- BHypermagnesemia
- CHyponatremia
- DHyperkalemia
- EHypokalemiaCorrect answer
- FHypocalcemia
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