Moscow city. 1980 year. All-Union Scientific Center of Surgery of the USSR Academy of Medical Sciences. Academician B. V. Petrovsky is preparing for the operation. Hyperbaric chamber for heart operations. Artificial heart, other devices. Heart surgery in a pressure chamber. BV Petrovsky talks with doctors. Moscow city. Doctor of Medical Sciences, Professor, Corresponding Member of the Academy of Medical Sciences, Head of the Surgical Department of the IV Rusakov City Children's Clinical Hospital S. Ya. Doletsky makes a medical round in the department, talks with hospital doctors (synchronously).