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Case 1:

Case 1:


Case 1:A Woman With Orthostatic Hypotension

A 41-year-old woman has had a 2-week bout of nausea, vomiting, and diarrhea.
Her history includes chronic hepatitis C and alcohol abuse. She also has orthostatic
hypotension. A baseline ECG is obtained.

Which of the following serum laboratory abnormalities best explains the
ECG findings?

A. Hyponatremia.
B. Hypokalemia.
C. Elevated troponin I level.
D. Hypercalcemia.


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