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Titolo:
Aortic valve replacement with Medtronic Freestyle Bioprosthesis: Operativetechnique and results
Autore:
Doty, JR; Flores, JH; Millar, RC; Doty, DB;
Indirizzi:
LDS Hosp, Dept Surg, Div Thorac & Cardiovasc Surg, Salt Lake City, UT 84103 USA LDS Hosp Salt Lake City UT USA 84103 c Surg, Salt Lake City, UT 84103 USA
Titolo Testata:
JOURNAL OF CARDIAC SURGERY
fascicolo: 3, volume: 13, anno: 1998,
pagine: 208 - 217
SICI:
0886-0440(199805/06)13:3<208:AVRWMF>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
TORONTO STENTLESS VALVE; EARLY EXPERIENCE; PORCINE VALVE; XENOGRAFT; HOMOGRAFT; ROOT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Doty, DB LDS Hosp, Dept Surg, Div Thorac & Cardiovasc Surg, 324 10th Ave, Salt LakeCity, UT 84103 USA LDS Hosp 324 10th Ave Salt Lake City UT USA 84103 y, UT 84103 USA
Citazione:
J.R. Doty et al., "Aortic valve replacement with Medtronic Freestyle Bioprosthesis: Operativetechnique and results", J CARDIAC S, 13(3), 1998, pp. 208-217

Abstract

Objective: This study evaluates the initial results for safety and efficacy of aortic valve replacement (AVR) using the Medtronic Freestyle Bioprosthesis. Methods: One hundred three patients underwent AVR with the Medtronic Freestyle Bioprosthesis over a 40-month period. There were 59 male and 44 female patients with a mean age of 74 years (range 36 to 88 years). Valve size ranged from 19 to 27 mm, and all valves were implanted using a freehand subcoronary technique. Anticoagulation with coumadin was only used for atrial fibrillation. Aspirin was given to patients with associated coronary artery disease. Echocardiography to assess transvalvular pressure gradient andeffective valve orifice area was performed at discharge, 3 to 6 months, 1 year, and then annually. Results: There were 4 (3.9%) deaths within 30 daysof operation and 5 (4.9%) late deaths. Two (1.9%) deaths were valve-related, one from commissural dehiscence and one from bacterial endocarditis. Three (2.9%) deaths, two early and one late, were from other cardiac causes. The re maining deaths were from noncardiac causes. Five (4.9%) patients suffered a thromboembolic event, two had permanent neurological deficits, two had transient neurological events, and one had coronary artery occlusion. Mean transvalvular gradient assessed by echocardiography was low at all time intervals: discharge (12.8 mmHg), 3 to 6 months (11.3 mmHg), 1 year (12.0 mmHg), and 2 years (11.6 mmHg). Mean effective valve orifice area was good at all time intervals: discharge (1.4 cm(2)), 3 to 6 months (1.5 cm(2)), 1 year (1.6 cm(2)), and 2 years (1.6 cm(2)). Of the 38 patients assessed by echocardiography at 1 year, 33 (87%) had no or trivial valve incompetence andthe remainder had mild valve incompetence. Conclusions: Aortic valve replacement with the Medtronic Freestyle Bioprosthesis has a low incidence of early valve-related mortality and thromboembolism. The bioprosthesis demonstrates good hemodynamic performance even in small diameters and is particularly well suited for older patients and the small aortic root.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 20:56:18