IX All-Russia seminar dedicated to memory of Professor N.A.Belokon «PROBLEMS of PATIENTS with CORRECTED CONGENITAL HEART DISEASES: POSSIBILITIES of DIAGNOSTIC, TREATMENT and AFTERTREATMENT» will take place in Kazan on September, 11-12th, 2015. Leading experts from Russia and foreign countries will take part in seminar. The 20 anniversary of children's cardio-surgery service of Tatarstan Republic will be celebrated within the limits of seminar.