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Difficulty: MediumCardiovascular System

A 72-year-old retired teacher presents to the urgent care clinic with progressively worsening breathing difficulty over the past three days. He reports a sensation of chest tightness and a new cough that produces clear, frothy sputum. His medical history includes hypertension, coronary artery disease, and a 35-pack-year smoking history, though he quit five years ago. Over the last two nights, he has frequently awakened gasping for air and has resorted to sleeping upright in a recliner chair. His current home medications are aspirin, metoprolol, and lisinopril. Vital signs are temperature 36.8°C (98.2°F), blood pressure 168/94 mm Hg, pulse 110/min, and respiratory rate 24/min. Pulse oximetry is 88% on room air. Physical examination reveals prominent jugular venous distention. Lung auscultation demonstrates widespread expiratory wheezing and fine crackles extending to the mid-lung fields bilaterally. Cardiac examination reveals tachycardia with a regular rhythm and an extra low-frequency heart sound occurring just after S2. There is 2+ bilateral pitting edema extending to the mid-calf. Which of the following is the most appropriate initial pharmacologic management for this patient?

  1. A
    Inhaled albuterol
  2. B
    Oral azithromycin
  3. Intravenous furosemideAnswer
  4. D
    Intravenous methylprednisolone
  5. E
    Inhaled tiotropium

Answer

Intravenous furosemide is the most appropriate initial pharmacologic therapy.
This patient's presentation of worsening dyspnea, orthopnea, paroxysmal nocturnal dyspnea, frothy sputum, jugular venous distention, an S3 gallop, and peripheral edema is highly characteristic of acute decompensated heart failure (ADHF). The wheezing is due to peribronchial edema (often termed 'cardiac asthma') rather than primary bronchospasm. The most appropriate initial pharmacologic management for ADHF with signs of volume overload is intravenous loop diuretics (e.g., furosemide), which rapidly decrease preload and alleviate pulmonary congestion.

Step-by-Step Solution

1
Analyze the patient's symptoms and vital signs.
The patient presents with acute dyspnea, orthopnea, paroxysmal nocturnal dyspnea, hypoxemia (88%), and hypertension.
Identifying the onset and nature of respiratory distress helps narrow the differential diagnosis.
2
Interpret the physical examination findings.
Findings include jugular venous distention, an S3 gallop, crackles, wheezing, and peripheral edema.
Differentiating between pulmonary (e.g., COPD) and cardiac (e.g., ADHF) causes of dyspnea relies heavily on clinical signs. An S3 gallop and JVD are highly specific for heart failure.
3
Synthesize the data to form a definitive diagnosis.
The combination of symptoms and signs confirms acute decompensated heart failure (ADHF) presenting with 'cardiac asthma' (wheezing due to peribronchial edema).
Recognizing that wheezing can occur in ADHF prevents the misdiagnosis of a COPD exacerbation in a patient with a smoking history.
4
Determine the most appropriate initial pharmacologic management.
Intravenous furosemide should be administered.
Loop diuretics rapidly reduce intravascular volume and preload, which is the primary immediate goal in managing ADHF with pulmonary edema.

Key Concept

Acute decompensated heart failure (ADHF) can present with wheezing ('cardiac asthma') due to peribronchial edema, which must be distinguished from a COPD exacerbation using specific signs like an S3 gallop and jugular venous distention. Intravenous loop diuretics are the primary treatment.
Estimated Time:1m 30s
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Topics

Cardiovascular System

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