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Zorluk: OrtaGeneral Internal Medicine

A 68-year-old woman seeks medical attention at the emergency department due to a 3-day history of progressively worsening shortness of breath. She also reports a persistent cough and has been sleeping in a recliner chair because she feels a "smothering" sensation when lying flat. Her past medical history is significant for hypertension, hyperlipidemia, and a 40-pack-year smoking history. Her daily medications include amlodipine, atorvastatin, and low-dose aspirin. Her temperature is 36.9°C (98.4°F), blood pressure is 172/96 mm Hg, pulse is 110/min, and respiratory rate is 26/min. Pulse oximetry is 88% on room air. Physical examination shows jugular venous distention when the patient is seated at a 45-degree angle. Pulmonary auscultation reveals diffuse expiratory wheezes and bilateral crackles at the lung bases that do not clear with coughing. Cardiac auscultation demonstrates a regular tachycardia with a prominent S3 gallop. Bilateral 2+ pitting edema is noted in the lower extremities. Which of the following is the most appropriate initial management for this patient's acute symptoms?

  1. Intravenous furosemideCevap
  2. B
    Intravenous methylprednisolone and nebulized albuterol
  3. C
    Intravenous piperacillin-tazobactam and vancomycin
  4. D
    Oral azithromycin and inhaled tiotropium
  5. E
    Supplemental oxygen titrated to a target saturation of 88% to 92%

Cevap

Administration of intravenous furosemide
The correct intervention is the administration of an intravenous loop diuretic. This patient is presenting with acute decompensated heart failure (ADHF), characterized by marked fluid overload (jugular venous distention, bilateral pulmonary crackles, lower extremity edema) and an S3 gallop. The diffuse expiratory wheezing she exhibits is known as 'cardiac asthma,' which is caused by peribronchial edema and reflex bronchoconstriction. This presentation can easily be misdiagnosed as a primary obstructive airway disease like a COPD exacerbation, especially given her significant smoking history. The most appropriate initial management is loop diuretic therapy (e.g., intravenous furosemide) to quickly reduce intravascular volume, decrease cardiac preload, and alleviate pulmonary congestion.

Adım Adım Çözüm

1
Identify the primary clinical syndrome based on history and physical examination findings.
The patient presents with definitive signs of fluid overload, including jugular venous distention, an S3 gallop, pulmonary crackles, orthopnea, and lower extremity pitting edema.
Synthesizing the clinical signs is essential to accurately differentiate between cardiac and pulmonary causes of acute dyspnea.
2
Interpret the presence of diffuse expiratory wheezing in this specific clinical context.
The wheezing is due to peribronchial edema ('cardiac asthma') resulting from acute decompensated heart failure (ADHF), rather than a primary obstructive airway disease.
A 40-pack-year smoking history can cause diagnostic anchoring on COPD, but the prominent signs of right and left heart failure indicate ADHF as the acute etiology.
3
Determine the most appropriate initial therapeutic intervention for ADHF.
Administer an intravenous loop diuretic such as furosemide.
Loop diuretics rapidly decrease intravascular volume and reduce ventricular preload, which alleviates pulmonary congestion and improves oxygenation.

Anahtar Kavram

Differentiating acute decompensated heart failure (presenting with cardiac asthma) from COPD exacerbation, and utilizing loop diuretics for acute management.
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General Internal Medicine

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