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Zorluk: KolayGeneral Internal Medicine

Progressive shortness of breath over the past 48 hours prompts a 62-year-old man to seek evaluation at the emergency department. He has a 45-pack-year smoking history, type 2 diabetes mellitus, and essential hypertension. The patient notes that his breathing worsens significantly when he lies flat, forcing him to sleep in a recliner chair. His temperature is 37.2°C (99.0°F), blood pressure is 162/94 mm Hg, pulse is 108/min, and respiratory rate is 24/min. Pulse oximetry shows an oxygen saturation of 90% on room air. Physical examination reveals distended neck veins while sitting at a 45-degree angle. Lung auscultation demonstrates bilateral basilar crackles without wheezing. Cardiac examination reveals a regular tachycardia with a prominent S3 gallop. A chest radiograph demonstrates cardiomegaly and cephalization of pulmonary vessels. Which of the following is the most likely diagnosis?

  1. Acute decompensated heart failureCevap
  2. B
    Chronic obstructive pulmonary disease exacerbation
  3. C
    Cor pulmonale
  4. D
    Community-acquired pneumonia
  5. E
    Acute pulmonary embolism

Cevap

The correct answer is acute decompensated heart failure.
The correct answer is acute decompensated heart failure. This patient presents with a classic constellation of symptoms and signs of acute biventricular heart failure. His orthopnea, bilateral basilar crackles, and S3 gallop indicate left-sided fluid overload and elevated left ventricular end-diastolic pressure. The jugular venous distention indicates right-sided fluid overload. Finally, the chest radiograph findings of cardiomegaly and cephalization (pulmonary venous congestion) definitively confirm the diagnosis over primary pulmonary pathologies.

Adım Adım Çözüm

1
Identify the primary clinical syndrome based on the history.
The patient presents with acute, progressively worsening dyspnea and severe orthopnea (needing to sleep in a recliner).
Recognizing orthopnea strongly suggests a cardiogenic etiology for the dyspnea due to central fluid redistribution when supine.
2
Analyze the physical examination findings for diagnostic clues.
The exam shows jugular venous distention (right-sided fluid overload), bilateral basilar crackles (alveolar fluid), and an S3 gallop (rapid ventricular filling in a non-compliant, overloaded left ventricle).
These findings collectively indicate biventricular volume overload, distinguishing it from purely pulmonary causes of dyspnea.
3
Correlate clinical findings with the provided imaging results.
The chest radiograph shows cardiomegaly and cephalization (redistribution of blood flow to the upper lung zones).
This confirms the presence of pulmonary venous hypertension secondary to left heart failure, establishing the definitive diagnosis.

Anahtar Kavram

Diagnosis of acute decompensated heart failure hinges on identifying signs of left-sided (orthopnea, crackles, S3 gallop, cephalization) and right-sided (JVD) volume overload.
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General Internal Medicine

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