[Clinico-experimental evaluation of methods of aortic annuloplasty during aortic valve prosthesis]

Various methods of aortoannuloplasty in replacement of the aortic valve in patients with a narrow root of the aorta were evaluated experimentally. It is shown that the simplest method for dilatation of the root of the aorta is that suggested by Nicks, which allows the effective diameter of the root to be increased to 4.5 mm. The Rastan-Konno operation is most radical, the diameter of the fibrous ring is increased by 13.5 mm on the average. The method, however, is technically difficult and injurious. A working classification of the severity of a narrow root of the aorta is suggested and operative methods for each case are recommended.