Keywords: mitral valve stenosis, mitral valve disease, mitral valve prolapse, mitral valve regurgitation, pulmonary valve stenosis, rheumatic mitral stenosis, aortic valve disease, bicuspid aortic valve, idiopathic hypertrophic subaortic stenosis, mitral regurgitation, pulmonary artery stenosis, pulmonary valve disorders, pulmonary valve insufficiency, rheumatic aortic stenosis, rheumatic diseases of pulmonary valve, rheumatic mitral regurgitation, subaortic stenosis