USMLE step 2 Mcq 23:A 42-year-old man with acute renal failure is confused

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Question:
A 42-year-old man with acute renal failure is confused. His serum potassium is 8.1 mEq/L . The most likely abnormal ECG finding is
a) T wave inversion
b) PR interval of 300ms
c) QT interval of 0.4s
d) U wave
e) tall tented T waves test


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