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Zorluk: KolayCardiovascular System

A 54-year-old woman with a history of metastatic breast cancer is brought to the emergency department due to progressive shortness of breath, generalized weakness, and lightheadedness over the past three days. She reports that she nearly fainted earlier today while walking to the bathroom. Her temperature is 37.1 C (98.8 F), blood pressure is 82/45 mm Hg, pulse is 122/min, and respirations are 24/min. Her systolic blood pressure decreases by 15 mm Hg during inspiration. Physical examination reveals markedly distended jugular veins. The lungs are clear to auscultation bilaterally. Cardiac auscultation demonstrates distant, muffled heart sounds. Which of the following is the most appropriate next step in the management of this patient?

  1. Bedside echocardiographyCevap
  2. B
    Intravenous furosemide
  3. C
    Computed tomography pulmonary angiography
  4. D
    Inhaled albuterol therapy
  5. E
    Intravenous broad-spectrum antibiotics

Cevap

Bedside echocardiography
The correct answer is bedside echocardiography. This patient's presentation of hypotension, elevated jugular venous pressure, and muffled heart sounds in the setting of known malignancy is highly indicative of malignant pericardial effusion leading to cardiac tamponade. The presence of pulsus paradoxus (an inspiratory drop in systolic blood pressure greater than 10 mm Hg) further supports this diagnosis. Bedside echocardiography allows for rapid, non-invasive confirmation of a pericardial effusion and signs of right ventricular diastolic collapse without removing the hemodynamically unstable patient from the resuscitation area.

Adım Adım Çözüm

1
Analyze the patient's vital signs and physical examination findings.
The patient exhibits hypotension (82/45 mm Hg), marked jugular venous distention, and muffled heart sounds, which constitute Beck's triad.
Recognizing this classic clinical triad is the key to differentiating obstructive shock from other causes of hypotension.
2
Identify the additional confirmatory clinical sign.
The patient has a >10 mm Hg drop in systolic blood pressure during inspiration, defining pulsus paradoxus.
Pulsus paradoxus is highly specific for cardiac tamponade in this clinical context.
3
Determine the most appropriate and safe next diagnostic step.
Bedside echocardiography is selected.
In a hemodynamically unstable patient with suspected cardiac tamponade, an immediate, non-invasive bedside confirmation of pericardial effusion is required prior to emergent drainage.

Anahtar Kavram

Cardiac Tamponade Recognition and Initial Evaluation
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Konular

Cardiovascular System

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