Professor Petrovsky at the Institute of Experimental Thoracic Surgery Sechenov preparing for operations: washing hands, tie on a mask. Moment of heart surgery. The operation was performed by Prof. G. Soloviev, advises Professor Petrovsky. Petrovsky and GM Solov'ev in the ward with children who underwent surgery. Surgeon VI Burakovsky in the room of physiotherapy 1st Gradskaya Hospital watching operated them children, doing the exercises.