Sterile vegetations, myocarditis, and fibrinous pericarditis are features of pancarditis in which condition?

Sterile vegetations, myocarditis, and fibrinous pericarditis are features of pancarditis in which condition?

• A. Valve disease following a dental procedure
• B. IV drug use
• C. Congenitally bicuspid aortic valve
• D. Pancarditis of rheumatic fever

Answer: (D)

In rheumatic fever, the heart is inflamed across all three layers, a pattern called pancarditis. The myocardium shows Aschoff bodies, which are granulomatous areas with characteristic Anitschkow cells, reflecting an immune-mediated myocarditis. The endocardium develops small sterile vegetations along the lines of valve closure, known as verrucae, rather than infectious clumps of bacteria. The pericardium often becomes inflamed with a fibrinous exudate, producing fibrinous pericarditis. The key point is that these lesions are sterile and immune-driven, not caused by an infection. This combination—sterile vegetations on valves, myocarditis with Aschoff-type changes, and fibrinous pericarditis—fits rheumatic fever after a streptococcal throat infection. In contrast, infectious endocarditis from dental procedures or IV drug use would involve infected vegetations and lack the characteristic Aschoff myocarditis and pancardial involvement. Congenital bicuspid valve predisposes to valve disease but does not explain pancarditis with sterile inflammatory lesions across all heart layers.

In rheumatic fever, the heart is inflamed across all three layers, a pattern called pancarditis. The myocardium shows Aschoff bodies, which are granulomatous areas with characteristic Anitschkow cells, reflecting an immune-mediated myocarditis. The endocardium develops small sterile vegetations along the lines of valve closure, known as verrucae, rather than infectious clumps of bacteria. The pericardium often becomes inflamed with a fibrinous exudate, producing fibrinous pericarditis. The key point is that these lesions are sterile and immune-driven, not caused by an infection.

This combination—sterile vegetations on valves, myocarditis with Aschoff-type changes, and fibrinous pericarditis—fits rheumatic fever after a streptococcal throat infection. In contrast, infectious endocarditis from dental procedures or IV drug use would involve infected vegetations and lack the characteristic Aschoff myocarditis and pancardial involvement. Congenital bicuspid valve predisposes to valve disease but does not explain pancarditis with sterile inflammatory lesions across all heart layers.