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Zorluk: OrtaCardiovascular System

A 73-year-old woman is brought to the emergency department at 2:00 AM by ambulance due to severe, worsening shortness of breath. She reports waking up abruptly gasping for air and feeling a tight sensation in her chest. Her medical history includes type 2 diabetes mellitus, hypertension, hyperlipidemia, and a 45-pack-year smoking history. She currently smokes half a pack of cigarettes daily. Temperature is 36.8°C (98.2°F), blood pressure is 178/102 mm Hg, pulse is 114/min, and respirations are 28/min. Pulse oximetry is 85% on room air. The patient is sitting upright on the edge of the stretcher, diaphoretic, and using accessory muscles of respiration. Physical examination reveals a jugular venous pressure estimated at 11 cm H2OH_2O. Lung auscultation demonstrates diffuse expiratory wheezes and crackles halfway up both posterior lung fields. Cardiac auscultation reveals a regular tachycardia and a prominent third heart sound (S3S_3). The bilateral lower extremities exhibit 2+ pitting edema extending to the shins. Electrocardiogram shows sinus tachycardia and left ventricular hypertrophy. Which of the following is the most appropriate initial pharmacological management for this patient?

  1. Intravenous furosemideCevap
  2. B
    Inhaled albuterol and systemic corticosteroids
  3. C
    Intravenous piperacillin-tazobactam
  4. D
    Intravenous metoprolol
  5. E
    Intravenous normal saline bolus

Cevap

Intravenous furosemide
The correct answer is intravenous furosemide. This patient is presenting with acute decompensated heart failure (ADHF) characterized by acute pulmonary edema. Classic signs of ADHF include paroxysmal nocturnal dyspnea, hypoxia, severe hypertension, jugular venous distention, bibasilar crackles, an S3S_3 gallop, and lower extremity edema. The presence of wheezing in this context is known as 'cardiac asthma,' which is caused by bronchospasm secondary to peribronchial edema. The most appropriate initial pharmacological treatment is intravenous loop diuretics to rapidly reduce intravascular volume, decrease cardiac preload, and alleviate pulmonary congestion. Given her severe hypertension, noninvasive positive pressure ventilation (NPPV) and vasodilators (like nitroglycerin) may also be adjunctively indicated.

Adım Adım Çözüm

1
Analyze the patient's presenting symptoms and vital signs.
The patient has paroxysmal nocturnal dyspnea, severe respiratory distress, hypoxia, significant hypertension, and tachycardia.
Establishing the severity and nature of the respiratory compromise is critical for initial triage.
2
Evaluate the physical examination findings to differentiate the cause of dyspnea.
The presence of elevated jugular venous pressure, an S3S_3 gallop, bibasilar crackles, and peripheral edema points to volume overload and left ventricular failure.
These specific signs differentiate cardiogenic pulmonary edema from a primary pulmonary pathology like a COPD exacerbation.
3
Determine the most appropriate initial pharmacological intervention for the diagnosed condition.
The patient is experiencing acute decompensated heart failure (ADHF). The standard initial medical therapy involves intravenous loop diuretics (like furosemide) to induce diuresis and provide immediate venodilation.
Loop diuretics rapidly reduce cardiac preload, thereby alleviating pulmonary congestion and improving oxygenation.

Anahtar Kavram

The clinical differentiation of acute decompensated heart failure ('cardiac asthma') from COPD exacerbation, and the appropriate initial management with intravenous loop diuretics.
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Cardiovascular System

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