Rheumatic heart disease (RHD) is the most common cause of acquired heart disease in developing countries and remains a serious public health problem. In the subclinical course of carditis, the absence of typical symptoms and the normal range of classical echocardiographic measurements used to evaluate cardiac functions have required new echocardiographic methods and parameters. Previous studies regarding rheumatic heart disease in children and adults have shown that strain patterns obtained by speckle tracking echocardiography, are in fact affected although left ventricular systolic functions are preserved, yet some studies have suggested otherwise. The aim of our study is to compare the use of speckle tracking echocardiography with conventional methods in the evaluation of cardiac functions and myocardial involvement in children with subclinical RHD.