Pericarditis: Understanding Inflammation of the Heart Sac

The correct answer is pericarditis.

Pericarditis is an inflammation of the pericardium, which is the sac that surrounds the heart. It can be caused by a variety of factors, including infection, autoimmune disorders, and chest trauma. Pericarditis can cause chest pain, shortness of breath, and fever. Treatment typically involves anti-inflammatory medications and rest.