mitral stenosis: obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)
valvular heart disease: heart disease caused by stenosis of the cardiac valves and obstructed blood flow or caused by degeneration and blood regurgitation
air combat command: a command that is the primary provider of air combat weapon systems to the United States Air Force; operates fighter, bomber, reconnaissance, battle-management, and rescue aircraft