Fig. 3

Number of patients with RHD valve lesions (all stages). Legend: Mild lesions” represented definite RHD with mild mitral and/or aortic valve incompetence and/or stenosis. In the categories of “Pure AS” and “Pure AR”, patients always had echocardiographic features of rheumatic involvement of the mitral valve (with trivial to mild mitral valve dysfunction) which supported the diagnosis of RHD. “Pure MR”: Isolated moderate to severe mitral regurgitation; “Pure MS”: Isolated moderate to severe mitral stenosis; “MR & MS”: mixed mitral valve disease – coexistent moderate to severe mitral regurgitation and mitral stenosis; “AR & AS”: mixed aortic valve disease – moderate to severe aortic regurgitation and stenosis; “MV & AV”: mixed mitral and aortic valve disease - coexistent moderate to severe mitral and aortic valve disease