Authors describe the case history of patient with acute endocarditis of native aortic valve with following establishmet of the diagnosis in late period – with complications: severe aortic regurgitation and features of left ventricule heart failure, it was caused by chronic inflamatory proces reactivation in urinary tract. They present diagnostic and therapeutic methods leading to definitive treatment of patient.

        Key words: acute endocarditis – heart failure – diagnostic – treatment.