What are early signs of cardiac tamponade due to a large pericardial effusion?

• A. Chronic cough and fever
• B. Recent upper respiratory infection and dyspnea
• C. Elevated blood pressure and bradycardia
• D. Excessive sweating and palpitations

Answer: (B)

Early signs of cardiac tamponade due to a large pericardial effusion often manifest as dyspnea, which is difficulty breathing or shortness of breath. This symptom arises because the accumulation of fluid in the pericardial sac puts pressure on the heart, restricting its ability to fill and pump effectively.

A recent upper respiratory infection could indicate a viral illness that leads to pericarditis, which can subsequently result in fluid accumulation. The combination of these factors can contribute to the onset of dyspnea, making it a pertinent early sign for this condition.

While chronic cough, excessive sweating, and palpitations might suggest other cardiovascular or respiratory issues, they do not specifically highlight the classic symptoms associated with cardiac tamponade. Elevated blood pressure and bradycardia are also not typical early signs of tamponade; rather, one might expect hypotension and tachycardia as fluid accumulation worsens. Thus, the presence of dyspnea coupled with a recent upper respiratory infection aligns with the presentation of early cardiac tamponade signs.