Final answer:
Auscultatory findings in rheumatic mitral valve stenosis include a loud S1 and may include the Austin Flint murmur. The loud S1 occurs due to restricted movement of the thickened mitral valve leaflets. A mid-systolic click and fixed splitting of S2 are not typical findings in mitral stenosis.
Step-by-step explanation:
Auscultatory findings in rheumatic mitral valve stenosis often include a loud S1. The S1 sound, or first heart sound, is caused by the closing of the atrioventricular valves. In the case of mitral valve stenosis, the mitral valve leaflets are thickened and their movement is restricted, which can lead to a louder S1 as the valve snaps shut. Another finding could be a mid-diastolic murmur, also known as the Austin Flint murmur, which occurs due to the regurgitation of blood from the aortic valve causing the anterior mitral leaflet to vibrate. Both are indicative of the pathological changes in the heart structure that could include hypertrophic cardiomyopathy, which is the enlargement of the heart generally for no known reason. The typical mid-systolic click is most commonly associated with mitral valve prolapse rather than stenosis. Fixed splitting of S2 is not commonly associated with mitral valve stenosis but can be indicative of other conditions such as an atrial septal defect.