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Zorluk: OrtaCardiovascular System

A ward nurse urgently requests an evaluation of a 71-year-old male who developed severe, sudden-onset shortness of breath 20 minutes ago. The patient is currently on postoperative day 3 following an elective sigmoid resection for recurrent diverticulitis. His medical history is significant for ischemic heart disease, diet-controlled type 2 diabetes mellitus, and a 40-pack-year smoking history. Over the past 24 hours, he received 3 liters of intravenous lactated Ringer's solution for transient oliguria.

Vital signs are:
- Temperature: 37.2°C (99.0°F)
- Blood pressure: 168/94 mm Hg
- Pulse: 112/min
- Respirations: 26/min
- Oxygen saturation: 87% on room air

Physical examination reveals an agitated, diaphoretic man sitting upright and using accessory muscles of respiration. The jugular veins are distended to the angle of the mandible when the patient is seated at a 45-degree angle. Cardiac auscultation reveals a regular tachycardia with a distinct, low-pitched additional heart sound heard in early diastole. Lung auscultation demonstrates prolonged expiration with diffuse polyphonic wheezing and bilateral moist crackles in the lower lung fields.

Arterial blood gas analysis on room air shows:
- pH: 7.287.28
- pCO 2_2: 5454 mm Hg
- pO 2_2: 5656 mm Hg
- HCO 3−_3^-: 2424 mEq/L

Which of the following is the most appropriate initial management for this patient?

  1. Intravenous furosemide administrationCevap
  2. B
    Inhaled bronchodilators and systemic corticosteroids
  3. C
    Intravenous sodium bicarbonate infusion
  4. D
    Blood cultures followed by broad-spectrum antibiotics
  5. E
    Immediate transport for computed tomography pulmonary angiography

Cevap

Intravenous furosemide administration
The correct answer is the administration of a loop diuretic. This patient's acute respiratory distress, hypoxemia, marked jugular venous distention, S3 gallop, and bibasilar crackles following aggressive intravenous fluid resuscitation strongly indicate acute decompensated heart failure (ADHF) complicated by cardiogenic pulmonary edema. The wheezing noted on examination is a manifestation of 'cardiac asthma', which occurs when peribronchial edema compresses the small airways and causes bronchospasm. The initial management for ADHF with volume overload requires immediate preload reduction, which is most effectively achieved with intravenous loop diuretics (e.g., furosemide) alongside supplemental oxygen or noninvasive positive-pressure ventilation.

Adım Adım Çözüm

1
Analyze the patient's clinical presentation and vital signs.
The patient has acute respiratory failure (hypoxia, tachypnea, respiratory acidosis) in the setting of recent aggressive intravenous fluid resuscitation.
Establishing the severity and context of the respiratory failure is essential for prioritizing interventions.
2
Interpret the physical examination findings.
Jugular venous distention, a prominent S3 gallop, and bilateral crackles indicate severe volume overload and left ventricular dysfunction.
These classic signs differentiate cardiogenic causes of dyspnea from primary pulmonary causes.
3
Correlate the lung examination with the cardiac findings.
The presence of wheezing alongside heart failure signs represents 'cardiac asthma', caused by peribronchial edema, rather than a primary COPD exacerbation.
Misinterpreting the wheezing could lead to the wrong treatment pathway.
4
Select the most appropriate initial pharmacologic therapy.
Intravenous furosemide is selected to provide rapid preload reduction and relieve pulmonary congestion.
Loop diuretics form the cornerstone of acute management for volume-overloaded acute decompensated heart failure.

Anahtar Kavram

Acute decompensated heart failure can present with wheezing (cardiac asthma); diagnosis relies on recognizing concurrent signs of volume overload (S3 gallop, jugular venous distention), and initial management requires preload reduction with loop diuretics.
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Cardiovascular System

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