Question

The most common etiology of mitral valve stenosis is:

A. Congenital
B. Left atrial myxoma
C. Rheumatic fever
D. Severe mitral annular calcification

Answer 1

The most common etiology of mitral valve stenosis is rheumatic fever, which is an autoimmune response to Streptococcus pyogenes. This bacterial infection can cause inflammation of the heart and result in valve disorders.

Step-by-step explanation:

The most common etiology of mitral valve stenosis is C. Rheumatic fever. Rheumatic fever is an autoimmune response to Streptococcus pyogenes, a bacterium that is normally a childhood disease. It causes inflammation of the heart, known as carditis, which can lead to valvular disorders such as mitral valve stenosis.