Arrhythmias USMLE Step 1 Practice Question
A 62-year-old man with end-stage kidney disease on hemodialysis presents with generalized weakness and palpitations after missing his scheduled dialysis session. Vital signs show BP 158/92 mmHg, HR 98 bpm, RR 20/min, temperature 37.2°C. Serum potassium is 7.2 mEq/L with normal serum calcium. Troponin is negative. Which of the following ECG changes is most likely to appear early in this condition?
Answer choices
- AProminent U waves
- BOsborn waves
- CPeaked T wavesCorrect answer
- DDelta waves
- ESawtooth flutter waves
- FProlonged PR interval with widened QRS complex
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