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Zorluk: OrtaCardiovascular System

A 7171-year-old male is evaluated on the surgical ward due to the sudden onset of difficulty breathing. He underwent an uncomplicated right total hip arthroplasty four days ago. His medical history includes essential hypertension, hypercholesterolemia, diet-controlled type 2 diabetes mellitus, and a 3535-pack-year history of smoking. During his hospitalization, he has been receiving continuous intravenous normal saline at 100 mL/hr100\text{ mL/hr}.

This morning, the patient developed worsening dyspnea, particularly when lying flat, along with a persistent dry cough. His temperature is 37.5∘C37.5^\circ\text{C} (99.5∘F99.5^\circ\text{F}), blood pressure is 162/94 mmHg162/94\text{ mmHg}, pulse is 112/min112/\text{min}, and respiratory rate is 26/min26/\text{min}. Pulse oximetry indicates an oxygen saturation of 88%88\% on room air.

Physical examination reveals elevated jugular venous pressure. Cardiac auscultation shows a regular tachycardia with a distinct S3S_3 gallop. Pulmonary examination is notable for dullness to percussion at the lung bases, diffuse bilateral crackles, and scattered expiratory wheezing. The surgical incision is healing appropriately. Examination of the lower extremities reveals bilateral, symmetric pitting edema up to the mid-calves.

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

  1. Initiate therapy with an intravenous loop diureticCevap
  2. B
    Provide nebulized bronchodilators and systemic corticosteroids
  3. C
    Draw blood cultures and commence broad-spectrum antibiotics
  4. D
    Order a computed tomography pulmonary angiogram
  5. E
    Perform an arterial blood gas analysis to assess compensation

Cevap

The most appropriate initial step is to initiate therapy with an intravenous loop diuretic.
The correct answer is to initiate therapy with an intravenous loop diuretic. This patient is presenting with classic signs of acute decompensated heart failure (ADHF), likely precipitated by the continuous administration of intravenous fluids in the perioperative period. The combination of orthopnea, elevated jugular venous pressure, an S3S_3 gallop, diffuse bilateral crackles, and bilateral lower extremity edema points directly to volume overload causing both systemic and pulmonary congestion. The scattered wheezing observed is known as 'cardiac asthma,' which results from peribronchial edema rather than primary bronchospasm. The immediate management of ADHF focuses on reducing preload and alleviating pulmonary congestion through the administration of intravenous loop diuretics.

Adım Adım Çözüm

1
Analyze the patient's vital signs and respiratory symptoms in the context of recent surgery.
The patient has acute dyspnea, orthopnea, and hypoxemia on postoperative day 4 while receiving continuous intravenous fluids.
Establishing the timeline and severity of respiratory distress helps narrow the differential diagnosis.
2
Evaluate the physical examination findings to differentiate between pulmonary and cardiogenic etiologies.
The presence of elevated jugular venous pressure, an S3S_3 gallop, bilateral crackles, and pitting edema indicates systemic and pulmonary venous congestion.
These findings specifically point to volume overload and left ventricular failure rather than a primary lung disease or pulmonary embolism.
3
Determine the optimal immediate therapeutic intervention based on the diagnosis of acute decompensated heart failure.
Intravenous loop diuretics (e.g., furosemide) are indicated to reduce preload and alleviate pulmonary congestion.
Rapid diuresis is the cornerstone of managing acute cardiogenic pulmonary edema to improve oxygenation and respiratory mechanics.

Anahtar Kavram

Patients receiving aggressive intravenous fluids perioperatively are at high risk for acute decompensated heart failure, characterized by volume overload, an S3S_3 gallop, and pulmonary edema, which requires prompt treatment with intravenous loop diuretics.
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Cardiovascular System

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