Situation: A 72-year-old woman with heart failure with reduced ejection fraction (left ventricular ejection fraction 30%) is admitted to the medical ward for worsening shortness of breath and leg edema. Her home medications are furosemide 40 mg twice daily, digoxin 0.125 mg daily, carvedilol 6.25 mg twice daily, and spironolactone 25 mg daily. She weighs 64 kg on admission. At 02:00 on her first night, she wakes up gasping for breath and coughing pink, frothy sputum. Crackles are heard throughout both lungs. Her blood pressure is 168/96 mmHg, heart rate 118/min, respiratory rate 34/min, and oxygen saturation (SpO2) 84% on room air. Which action should the nurse take FIRST?

She has acute pulmonary edema. Placing her upright with the legs dependent reduces venous return (preload) to the congested lungs and eases breathing at once, and it can be done before any equipment or drug is ready. Oxygen, the intravenous loop diuretic, and notification of the physician follow immediately.

Clinical situation

This patient presents with the classic picture of acute cardiogenic pulmonary edema (CPE). The combination of known heart failure with reduced ejection fraction (LVEF 30%), acute onset of orthopnea, pink frothy sputum, diffuse crackles, hypertension, tachycardia, tachypnea, and profound hypoxemia (SpO₂ 84% on room air) indicates that fluid has rapidly shifted from the pulmonary capillaries into the alveolar spaces. This is a life-threatening emergency requiring immediate nursing action.

Why position change comes first

The first priority is to reduce the hydrostatic pressure driving fluid into the alveoli. Placing the patient upright with her legs in a dependent position immediately decreases venous return (preload) to the right heart, which in turn lowers pulmonary capillary hydrostatic pressure. This reduces the ongoing transudation of fluid into the alveolar spaces and improves gas exchange. Positioning is the only intervention listed that can be performed instantaneously, without waiting for medications, equipment, or a physician’s order. It directly addresses the underlying hemodynamic problem—elevated left-sided filling pressure—that defines cardiogenic pulmonary edema ^[1].

Pathophysiology of cardiogenic pulmonary edema

In CPE, elevated left ventricular end-diastolic pressure is transmitted backward through the left atrium and pulmonary veins into the pulmonary capillary bed. When pulmonary capillary pressure exceeds the opposing forces that keep fluid inside the vessel, fluid moves into the interstitial space and then into the alveoli ^[1]. Sustained high capillary pressure also damages the alveolar–epithelial barrier, increasing permeability and accelerating fluid transfer into the air spaces, which leads to edema and atelectasis. The pink, frothy sputum reflects the presence of red blood cells and protein-rich fluid mixing with air in the alveoli. Crackles throughout both lungs indicate widespread alveolar flooding.

The patient’s elevated blood pressure (168/96 mmHg) reflects compensatory sympathetic activation in response to hypoxemia and falling cardiac output. This increased afterload further impairs left ventricular emptying, worsening the pulmonary congestion. Sitting upright with legs dependent reduces venous return and also lowers the work of breathing by improving diaphragmatic excursion.

Why the other options are not first

Action	Why it is not the first action
Report to the attending physician	Notification is essential, but it does not change the patient’s position or improve oxygenation in the moment. The nurse can and should position the patient while someone else contacts the physician. Delaying positioning to make a phone call wastes critical seconds.
Give prescribed intravenous furosemide	IV loop diuretics reduce preload through diuresis and venodilation, but the effect takes minutes to begin. The drug must be verified, prepared, and administered. Positioning works immediately and can be done while the diuretic is being prepared.
Draw arterial blood gas	ABG analysis provides useful information about oxygenation, ventilation, and acid–base status, but it is a diagnostic procedure. It does not treat the patient’s respiratory distress or reduce pulmonary congestion. It should be done after immediate stabilizing measures are initiated.

Key point! In acute pulmonary edema, the nursing priority follows the ABC framework. Airway and breathing are addressed first by positioning the patient upright to maximize ventilation and reduce pulmonary congestion. Circulation is addressed next by reducing preload with diuretics and afterload with vasodilators as ordered. Diagnostic tests and physician notification occur concurrently but do not replace immediate bedside interventions.

Nursing assessment and management considerations

Effective management of CPE requires rapid clinical assessment and coordinated interventions. The nurse should assess respiratory effort, oxygen saturation, heart rate, blood pressure, urine output, and lung sounds at frequent intervals . Prompt application of non-invasive positive pressure ventilation (NIPPV) is supported by high-level evidence for improving oxygenation and reducing the need for intubation in patients with CPE. While NIPPV is not listed among the options here, it would be an important next step after positioning, along with high-flow oxygen.

The patient’s home medication list is relevant to ongoing care. Furosemide 40 mg twice daily, spironolactone 25 mg daily, carvedilol 6.25 mg twice daily, and digoxin 0.125 mg daily represent guideline-directed medical therapy for heart failure with reduced ejection fraction. However, acute decompensation requires escalation of therapy, not continuation of the chronic regimen. The nurse should anticipate orders for IV furosemide, possibly IV nitroglycerin to reduce preload and afterload, and oxygen therapy.

Watch out! Do not confuse the patient’s chronic heart failure medications with the acute treatment of pulmonary edema. Beta-blockers such as carvedilol are not given acutely during decompensated heart failure with pulmonary edema because they can further reduce cardiac output. Digoxin is not a first-line acute treatment for pulmonary edema. The acute priority is preload reduction, afterload reduction, and oxygenation.

Role of the nurse in acute pulmonary edema

Nursing care in acute pulmonary edema is vital for timely diagnosis and treatment . The nurse detects the event through systematic assessment, initiates immediate stabilizing measures, and accelerates definitive treatment. Positioning the patient upright with legs dependent is a core nursing intervention that can be performed without a physician’s order and without delay. It is the first step in a sequence that includes oxygen administration, IV diuretic therapy, and physician notification.

Key point! The sequence is: position first, oxygen next, then medications, then diagnostic tests and physician notification. Positioning is the only action that can be completed in seconds and directly reduces the pathophysiologic driver of the patient’s respiratory distress—elevated pulmonary capillary pressure from increased venous return.