title: Re: mid-term evaluation of Sorin Soprano bioprostheses in patients with a small aortic annulus <or=20 mm.
authors.affiliation: Bakoulev Scientific Center for Cardiovascular Surgery, Moscow, Russia.
authors.forename: Leo A
authors.initials: LA
authors.lastname: Bockeria
authors.forename: Ivan I
authors.initials: II
authors.lastname: Scopin
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Makushin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation*; D006439:Hemodynamics; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult