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Difficulty: EasyCardiovascular System

An independent 5454-year-old woman is evaluated at a walk-in medical center after experiencing one week of escalating breathlessness. She mentions a newly developed, irritating cough that worsens when she attempts to sleep in her bed, prompting her to sleep propped up in a living room chair. The patient has a known history of essential hypertension and has smoked a pack of cigarettes daily for thirty years. Her vitals indicate a blood pressure of 172/96 mmHg172/96\text{ mmHg}, a pulse of 108/min108\text{/min}, and respirations of 24/min24\text{/min}. Oxygen saturation reads 92%92\% while breathing ambient air. Physical examination reveals distended neck veins when she is seated upright. Auscultating her back reveals widespread crackles at both lung bases that persist despite directed coughing. Cardiac examination is notable for a rapid rate with a clearly audible S3S_3 gallop. Pressing on the skin of her lower legs leaves noticeable indentations bilaterally. Which of the following is the most appropriate initial pharmacologic intervention to relieve this patient's current respiratory symptoms?

  1. Intravenous furosemideAnswer
  2. B
    Inhaled albuterol and ipratropium
  3. C
    Oral prednisone
  4. D
    Intravenous ceftriaxone and azithromycin
  5. E
    Inhaled fluticasone and salmeterol

Answer

Intravenous furosemide is the correct initial pharmacologic intervention.
The correct intervention is intravenous furosemide. This patient is presenting with a classic clinical picture of acute decompensated heart failure (ADHF). She has symptoms of left-sided heart failure (orthopnea, dyspnea, bibasilar lung crackles) and right-sided heart failure (jugular venous distention, lower extremity pitting edema). The presence of an S3S_3 gallop is a highly specific marker for elevated left ventricular filling pressures. Intravenous loop diuretics, such as furosemide, are the first-line pharmacologic therapy to rapidly induce diuresis, decrease intravascular volume, reduce left ventricular preload, and effectively relieve pulmonary congestion and respiratory distress.

Step-by-Step Solution

1
Analyze the patient's symptoms and vital signs.
The patient has progressive dyspnea, orthopnea (sleeping in a chair), hypoxia, tachypnea, and tachycardia.
Identifying the primary clinical syndrome helps narrow down the differential diagnosis between pulmonary and cardiac causes of dyspnea.
2
Evaluate the physical examination findings.
Findings include jugular venous distention, bibasilar crackles, an S3S_3 gallop, and bilateral lower extremity pitting edema.
These are the hallmark signs of left- and right-sided volume overload, confirming a diagnosis of acute decompensated heart failure (ADHF).
3
Determine the most appropriate initial therapy for the diagnosed condition.
Loop diuretics (e.g., intravenous furosemide) are indicated to rapidly reduce volume overload and alleviate pulmonary congestion.
Diuresis directly treats the underlying pathophysiology of ADHF by decreasing left ventricular preload.

Key Concept

The primary initial treatment for acute decompensated heart failure with volume overload (evidenced by orthopnea, JVD, crackles, S3S_3 gallop, and edema) is aggressive diuresis with intravenous loop diuretics.
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Topics

Cardiovascular System

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