In cardiac tamponade, what is the status of breath sounds?

In cardiac tamponade, what is the status of breath sounds?

• A. Breath sounds are hyperresonant
• B. Breath sounds are absent
• C. Breath sounds may be normal
• D. Breath sounds decreased unevenly

Answer: (C)

Breath sounds are not directly affected by a pericardial effusion. In cardiac tamponade the problem is the heart being compressed so it can’t fill properly, which reduces output and causes signs like low blood pressure and muffled heart sounds. The lungs themselves are usually ventilated normally, so auscultation often reveals normal breath sounds. The phrase “breath sounds may be normal” reflects that tamponade doesn’t inherently change lung sounds, though a concurrent pleural effusion or other lung issue could alter them. Hyperresonant or absent breath sounds would point to a lung or air-space problem (like pneumothorax), not tamponade.

Breath sounds are not directly affected by a pericardial effusion. In cardiac tamponade the problem is the heart being compressed so it can’t fill properly, which reduces output and causes signs like low blood pressure and muffled heart sounds. The lungs themselves are usually ventilated normally, so auscultation often reveals normal breath sounds. The phrase “breath sounds may be normal” reflects that tamponade doesn’t inherently change lung sounds, though a concurrent pleural effusion or other lung issue could alter them. Hyperresonant or absent breath sounds would point to a lung or air-space problem (like pneumothorax), not tamponade.