The nurse is caring for a patient with congestive heart failure who has bilateral ankle edema, jugular vein distention, and a weight gain of 3 pounds in the past 24 hours.
What is the nurse's priority action?

Choice A rationale

For a client in acute heart failure following a myocardial infarction, the administration of 0.9 percent sodium chloride is often contraindicated or requires extreme caution. Acute heart failure involves the heart's inability to pump effectively, leading to pulmonary congestion and systemic fluid volume excess. Adding isotonic saline, which remains in the extracellular space, can worsen pulmonary edema and increase the workload on the failing left ventricle. The nurse should clarify this order to prevent further respiratory distress and cardiac strain.

Choice B rationale

Bumetanide is a potent loop diuretic used to rapidly reduce fluid volume in patients with acute heart failure and pulmonary congestion. A dose of 1 mg IV bolus every 12 hours is a standard intervention aimed at promoting diuresis and reducing preload. This helps clear fluid from the lungs and improves oxygenation. The nurse would monitor urine output and electrolyte levels, specifically looking for hypokalemia, as loop diuretics cause the kidneys to excrete potassium along with water and sodium.

Choice C rationale

Monitoring serum potassium is a critical and appropriate action for a patient with heart failure and a recent myocardial infarction. Potassium levels must stay within 3.5 to 5.0 mEq/L to maintain cardiac electrical stability. Many heart failure treatments, including diuretics and ACE inhibitors, significantly alter potassium levels. In the context of an injured myocardium following an infarct, any electrolyte imbalance can trigger lethal arrhythmias. Therefore, obtaining baseline and serial potassium levels is a standard of care that does not require clarification.

Choice D rationale

Morphine sulfate is frequently used in the treatment of acute heart failure and myocardial infarction. Beyond its analgesic properties for chest pain, morphine acts as a vasodilator, which reduces both preload and afterload. This effect decreases the myocardial oxygen demand and helps alleviate the anxiety associated with dyspnea. A dose of 2 mg IV bolus every 2 hours as needed is a common and appropriate prescription to manage symptoms and improve hemodynamics in the acute phase of cardiac distress.

Choice A rationale

Hyperglycemia is not a typical complication of combining ACE inhibitors and diuretics, although some diuretics like thiazides can slightly affect glucose levels. Hypokalemia is a common side effect of loop or thiazide diuretics, but ACE inhibitors actually promote potassium retention. Therefore, the risk of hypokalemia is often mitigated when these two drugs are used together. This choice does not represent the most significant or common combined risk associated with this specific drug pairing in heart failure.

Choice B rationale

ACE inhibitors and diuretics both lower blood pressure, which can lead to profound hypotension, especially during the initiation of therapy. Additionally, ACE inhibitors block the secretion of aldosterone, which normally promotes potassium excretion; this results in a risk of hyperkalemia. While some diuretics waste potassium, the potassium-retaining effect of the ACE inhibitor is a critical monitoring point. The combination of reduced vascular resistance and decreased fluid volume makes hypotension a primary concern for patient safety.

Choice C rationale

Hypertension is unlikely when a patient is taking two different types of antihypertensive medications. Both ACE inhibitors and diuretics are intended to lower blood pressure by reducing systemic vascular resistance and blood volume, respectively. Furthermore, while diuretics can cause hypokalemia, the presence of an ACE inhibitor makes hyperkalemia a more significant concern due to its effect on the renin-angiotensin-aldosterone system. This option incorrectly identifies both the blood pressure trend and the electrolyte risk.

Choice D rationale

Hypoglycemia is not a recognized side effect of ACE inhibitors or diuretics. Hyponatremia can occur with diuretic use due to the inhibition of sodium reabsorption in the renal tubules, but it is not the most common or characteristic complication when paired specifically with an ACE inhibitor. The most significant and immediate risks involve the regulation of potassium and the maintenance of adequate systemic perfusion pressure, making the monitoring of blood pressure and potassium levels the nursing priority.