Deputy head physician in treatment of Republican Clinical Hospital, Professor Mikhail Burmistrov and head of the thoracic surgery unit, Ph. D. Valery Matveev took part in the 9th International Cardiothoracic Surgery Congress in St. Petersburg. This is the largest scientific event in our country dedicated to the pathology of the chest. The Congress was attended by leading thoracic surgeons from 67 regions of Russia and 17 European countries.