For citations:

Gramatikov D.G., Litus V.S., Noginov V.K. Immediate results of aortic valve replacement in elderly and senile patients using the Ozaki technique and Perceval S seamless biological prosthesis. Grekov's Bulletin of Surgery. 2022;181(6):12-18. (In Russ.) https://doi.org/10.24884/0042-4625-2022-181-6-12-18