The rheumatic disease at children - has the appreciable tendency to acute, serious, recurring current. As a rule the cardiovascular system is amazed, and with each attack its damage amplifies. A basis of a cardiovascular decompensation at children always is activation of rheumatic process (despite lacking such signs, as a fever, a polyarthritis, etc.). "Absolute" attributes of rheumatic disease at children's age - a progressing lesion of heart, especially in a combination to a lesion of joints, a trochee, presence of rheumatic nodules. Latent rheumatic disease - difficultly distinguished variant of illness: reliability of the diagnosis. Proves to be true only presence of the generated valval heart disease. Alongside with existence primarily-latent there is also an again-latent rheumatic carditis: proceeding without clinically expressed activity, this form also conducts to formation of the heart diseases quite often combined, and development of a cardiosclerosis.