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

A persistent, dry, nonproductive cough is a common side effect of ACE inhibitors due to the accumulation of bradykinin in the respiratory tract. However, instructing a client to take a cough suppressant is inappropriate because the cough is a pharmacological side effect that will not respond well to suppressants. If the cough becomes intolerable for the client, the healthcare provider must be notified to potentially switch the medication to an angiotensin II receptor blocker instead of masking the symptom.

Choice B rationale

Most ACE inhibitors can be taken without regard to food, though some specific ones like captopril have better absorption on an empty stomach. Telling a client to take it with food is not a universal requirement for this class of medication and is not the most critical safety instruction. The priority for discharge teaching focuses on safety and hemodynamic stability, such as managing the vascular changes that occur when the renin-angiotensin-aldosterone system is inhibited by the new medication regimen.

Choice C rationale

ACE inhibitors promote vasodilation and reduce fluid volume by blocking the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. This reduction in peripheral vascular resistance can lead to a significant drop in blood pressure when changing positions. The nurse must instruct the client to rise slowly from a sitting or lying position to prevent falls and injury. This education is vital for safety, as orthostatic hypotension is a frequent and potentially dangerous adverse effect during initial therapy.

Choice D rationale

ACE inhibitors block the secretion of aldosterone, which normally promotes the excretion of potassium in the kidneys. By inhibiting this process, these medications can lead to hyperkalemia, where potassium levels exceed the normal range of 3.5 to 5.0 mEq/L. Encouraging the consumption of high-potassium foods like bananas increases the risk of developing cardiac arrhythmias due to dangerously high serum potassium levels. Clients should actually be cautioned against using salt substitutes or excessive potassium intake while on this medication.

Choice A rationale

Pulmonary embolism is a potential complication for any hospitalized patient due to immobility and venous stasis, but it is not the most common complication specifically following a myocardial infarction. While the risk of deep vein thrombosis exists, the primary pathological concerns after a heart attack are related to the damaged myocardium and the resulting electrical instability or mechanical failure of the heart pump, rather than venous thromboembolic disease.

Choice B rationale

Stroke can occur following a myocardial infarction, particularly if the patient develops atrial fibrillation or if a mural thrombus forms in the weakened left ventricle and embolizes. However, the incidence of stroke is lower compared to the immediate hemodynamic failures of the heart. While significant and life-altering, clinicians prioritize monitoring for heart failure and shock in the acute post-infarction period because these cardiac-specific complications occur with much higher frequency.

Choice C rationale

Acute renal failure can occur after a myocardial infarction as a result of decreased renal perfusion or "cardiorenal syndrome" when the heart can no longer maintain adequate mean arterial pressure. While kidneys are sensitive to drop-offs in cardiac output, this complication is usually secondary to the primary failure of the heart. It occurs less frequently as an immediate complication than cardiogenic shock, which represents the direct, catastrophic failure of the heart muscle itself.

Choice D rationale

Cardiogenic shock occurs when more than 40 percent of the left ventricular mass is infarcted, leading to a profound inability of the heart to maintain adequate systemic perfusion. This is the leading cause of in-hospital death following a myocardial infarction. The damaged muscle cannot generate enough force to maintain a stroke volume, leading to a cascade of hypotension and pulmonary edema. It remains the most common and feared major complication in the acute phase.