What can cause cardiac tamponade?

• A. A punctured lung.
• B. Fluid from an infection.
• C. A fractured rib.
• D. A lacerated artery.

Answer: (B)

Cardiac tamponade occurs when fluid accumulates in the pericardial space, which surrounds the heart. This accumulation puts pressure on the heart, impairing its ability to pump blood effectively. One common cause of this fluid accumulation is an infection, which can lead to pericarditis and result in fluid production. In addition to infections, other causes of fluid accumulation include malignancies and other inflammatory processes that can aggravate the pericardial sac.

While injuries to the chest, such as those caused by fractured ribs or punctured lungs, may theoretically contribute to heart problems or fluid buildup through different mechanisms, they are not direct causes of cardiac tamponade in the context presented. Similarly, while a lacerated artery can lead to internal bleeding, the connection to cardiac tamponade is indirect and less common compared to the more straightforward mechanism of fluid accumulation due to an infection. Thus, the pathway from an infection leading to sufficient fluid in the pericardial space makes this option the most clear and direct correlation with the development of cardiac tamponade.