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