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Difficulty: EasyPulmonary and Critical Care

A 72-year-old man with a history of chronic obstructive pulmonary disease (COPD) and hypertension is brought to the emergency department for severe, worsening shortness of breath over the past 24 hours. He reports that his breathing is especially difficult when he lies down to sleep, forcing him to sleep in a recliner chair. He denies fever, chills, or any change in the volume or color of his sputum. Blood pressure is 155/92 mm Hg, pulse is 108/min, and respirations are 26/min. Pulse oximetry shows 88% on room air. Physical examination reveals distended jugular veins, bilateral crackles at the lung bases, and an S3 gallop. There is 2+ bilateral lower extremity pitting edema.

Arterial blood gas analysis on room air shows:

ParameterValue
pH7.28
PaCO260 mm Hg
HCO3-27 mEq/L

Which of the following is the most appropriate next step in the management of this patient?

  1. Intravenous furosemideAnswer
  2. B
    Inhaled albuterol and systemic glucocorticoids
  3. C
    Intravenous piperacillin-tazobactam
  4. D
    Intravenous sodium bicarbonate
  5. E
    Empiric oral azithromycin

Answer

Intravenous furosemide is the most appropriate next step in management.
The correct answer is intravenous furosemide because the patient's presentation is classic for acute decompensated heart failure (ADHF). Despite his history of COPD, findings such as orthopnea (sleeping in a recliner), an S3 gallop, jugular venous distention, and pitting edema indicate severe volume overload and left ventricular dysfunction. Intravenous loop diuretics like furosemide rapidly decrease intravascular volume, relieving pulmonary congestion and improving respiratory mechanics. The respiratory acidosis seen on his blood gas will improve once the underlying pulmonary edema is resolved.

Step-by-Step Solution

1
Analyze the patient's symptoms and vital signs.
The patient has severe dyspnea, orthopnea, hypoxemia, and significant hypertension.
To identify the acuity and exact nature of the respiratory distress.
2
Evaluate the physical examination findings.
Findings include jugular venous distention, bibasilar crackles, an S3 gallop, and bilateral lower extremity pitting edema.
These specific signs help differentiate between possible causes of dyspnea in a patient with multiple comorbidities.
3
Synthesize findings to form a definitive diagnosis.
The combination of orthopnea, JVD, an S3 gallop, and edema strongly points to acute decompensated heart failure (ADHF) leading to cardiogenic pulmonary edema, despite the history of COPD.
Accurate diagnosis is required before initiating targeted therapy.
4
Determine the appropriate initial management.
Intravenous loop diuretics (such as furosemide) should be administered to rapidly reduce volume overload and relieve pulmonary congestion.
This is the standard, high-yield first-line treatment for ADHF.

Key Concept

Patients with a history of COPD can present with dyspnea due to acute decompensated heart failure (ADHF). Key differentiating features pointing to ADHF include orthopnea, jugular venous distention (JVD), an S3 gallop, and peripheral edema, which should be managed primarily with intravenous loop diuretics.
Estimated Time:1m 0s
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Topics

Pulmonary and Critical Care

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