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Difficulty: EasyCardiovascular System

Emergency medical services bring a 71-year-old retired architect to the emergency department due to progressively worsening difficulty breathing over the last 72 hours. He reports waking up multiple times during the night feeling starved for air and ultimately having to sleep sitting up in a recliner. His medical history is significant for essential hypertension, type 2 diabetes mellitus, and a 40-pack-year smoking history. His temperature is 37.1°C (98.8°F), blood pressure is 158/92 mm Hg, pulse is 96/min, and respirations are 24/min. Pulse oximetry shows 91% on room air. Physical examination reveals elevated jugular venous pressure, visible 9 cm above the sternal angle. Cardiac auscultation reveals a normal S1 and S2 with an additional low-pitched sound heard in early diastole. Pulmonary auscultation demonstrates bilateral crackles extending to the mid-lung fields and trace scattered expiratory wheezing. Arterial blood gas analysis on room air reveals a pH of 7.32, PaCO2PaCO_2 of 46 mm Hg, and PaO2PaO_2 of 64 mm Hg. Which of the following is the most appropriate initial management for this patient?

  1. Intravenous torsemide administrationAnswer
  2. B
    Administration of nebulized albuterol and oral prednisone
  3. C
    Intravenous sodium bicarbonate therapy
  4. D
    Initiation of intravenous piperacillin-tazobactam
  5. E
    Measurement of serum thyroid-stimulating hormone prior to intervention

Answer

Intravenous torsemide administration
The clinical presentation is classic for acute decompensated heart failure (ADHF). The presence of orthopnea, paroxysmal nocturnal dyspnea, elevated jugular venous pressure, an S3 gallop (described as a low-pitched sound in early diastole), and bibasilar crackles overwhelmingly point to left ventricular failure with subsequent pulmonary edema. Loop diuretics, such as torsemide, furosemide, or bumetanide, are the mainstay of initial therapy. They rapidly reduce intravascular volume and venous return (preload), which alleviates pulmonary congestion and improves respiratory symptoms.

Step-by-Step Solution

1
Identify the primary etiology of the patient's acute respiratory distress.
The presence of paroxysmal nocturnal dyspnea, orthopnea, elevated jugular venous pressure, an S3 gallop, and bilateral crackles indicates acute decompensated heart failure (ADHF) with pulmonary edema.
Differentiating ADHF from a COPD exacerbation is critical, as the initial treatments are entirely different.
2
Determine the hemodynamic status of the patient.
The patient is hypertensive and volume overloaded ('warm and wet' profile).
Patients with ADHF who have adequate perfusion but severe congestion require immediate preload reduction.
3
Select the most appropriate initial pharmacological intervention.
Intravenous loop diuretics (such as torsemide, furosemide, or bumetanide) are indicated.
Loop diuretics rapidly reduce intravascular volume and venous return, which relieves pulmonary congestion and improves oxygenation.

Key Concept

Diagnosis and initial management of Acute Decompensated Heart Failure (ADHF)
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Topics

Cardiovascular System

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