Which of the following tests should be part of the pre-operative examination of patients who will be undergoing cardiac surgery?
  1. Serum urea and creatinine levels, electrocardiogram, echocardiogram
  2. Electrocardiogram, echocardiogram, chest x-ray, serum electrolytes
  3. Serum potassium level, prothrombin time, hematocrit, and serum creatinine level
  4. Serum potassium level, prothrombin time, hematocrit, serum creatinine level, electrocardiogram, echocardiogram and a chest x-ray
Explanation
Answer: D - The pre-operative examination of patients who will be undergoing cardiac surgery should include potassium level, prothrombin time, hematocrit, serum creatinine level, electrocardiogram, echocardiogram, and a chest x-ray.
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