In acute decompensated heart failure with pulmonary edema, what is the most appropriate initial pharmacologic intervention?

• A. Administer IV nitroglycerin to dilate veins
• B. Administer IV loop diuretic to reduce preload; provide oxygen if hypoxic
• C. Administer IV morphine for comfort
• D. Begin chronic oral ACE inhibitors immediately

Answer: (B)

In acute decompensated heart failure with pulmonary edema, the immediate problem is excess fluid that raises left-sided filling pressures and pushes fluid into the lungs. The fastest, most effective way to relieve this is to remove the excess volume, which is best achieved with an IV loop diuretic. This reduces preload, lowers pulmonary capillary pressures, and helps clear the edema. Providing oxygen if the patient is hypoxic supports tissue oxygenation during this process.

Other options don’t address the main issue as directly. IV morphine used to be common for comfort, but it can depress respiration and worsen outcomes, so it’s not favored. IV nitroglycerin can help by dilating veins and lowering preload, but diuresis is the primary, most reliable initial step in unloading the congested circulation. Beginning chronic oral ACE inhibitors right away isn’t appropriate in the acute stabilization phase and could cause hypotension or renal issues; they’re typically introduced after the patient is stabilized.