A patient who has just been admitted with pulmonary edema is scheduled to receive the following medications. Which medication should the nurse question before giving?

Correct Answer: D

Rationale: Although carvedilol is appropriate for the treatment of chronic heart failure, it is not used for patients with acute decompensated heart failure (ADHF) because of the risk of worsening the heart failure. The other drugs are appropriate for the patient with ADHF.

Correct Answer: B

Rationale: Coronary vessels are primarily located in the epicardium, supplying blood to the myocardium.

Correct Answer: C

Rationale: Mitral regurgitation causes blood to flow back into the left atrium, increasing its pressure.

Correct Answer: B

Rationale: The resting membrane potential of sinus nodal fibers is approximately -55 mV (assuming a typo in options; corrected to -55 mV).

Correct Answer: A

Rationale: HMG CoA reductase is located in the endoplasmic reticulum membrane, key to cholesterol synthesis.