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MITRAL INSUFFICIENCY OR INCOMPETENCYCategory: Circulatory System This is the most common valvular disease. The segments of the valve may be shortened and deformed. There is often stenosis (narrowing) caused by this deformity. The effects are regurgitation, flowing back of blood from the left ventricle into the left auricle, which is also receiving blood from the lungs, causing dilatation of the auricle and its enlargement to expel the extra blood; dilatation and other enlargement of the left ventricle occurs on account of the large quantity of blood forced in by the auricle; obstruction to flow of blood from pulmonary veins due to extra blood in left auricle, hence dilatation and enlargement of right ventricle which forces blood through the lungs; dilatation and enlargement of right auricle. Symptoms. If compensation is slightly disturbed we have blueness (cyanosis), clubbing of the fingers, hard breathing on exertion, and attacks of bronchitis and bleeding from the lungs. If compensation is seriously disturbed we are likely to have the blueness (cyanosis) more marked, heart beat feeble and irregular, constant hard breathing, with cough and water or bloody sputum, dropsy in the feet first and going up and involving the abdomen and chest cavities. Next: MITRAL STENOSIS Previous: NARROWING (Aortic Stenosis)
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