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Cary W. Akins
Mortimer J. Buckley
Willard M. Daggett
Gus J. Vlahakes
David F. Torchiana
Joren C. Madsen
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Ann Thorac Surg 1998;65:1545-1551
© 1998 The Society of Thoracic Surgeons

Original articles: cardiovascular

Risk of Reoperative Valve Replacement for Failed Mitral and Aortic Bioprostheses

Cary W. Akins, MDa, Mortimer J. Buckley, MDa, Willard M. Daggett, MDa, Alan D. Hilgenberg, MDa, Gus J. Vlahakes, MDa, David F. Torchiana, MDa, Joren C. Madsen, MDa

a Cardiac Surgical Unit, Massachusetts General Hospital, Boston, Massachusetts, USA

Address reprint requests to Dr Akins, Cardiac Surgical Unit, Massachusetts General Hospital, White 503, 32 Fruit St, Boston, MA 02114

Presented at the Thirty-fourth Annual Meeting of The Society of Thoracic Surgeons, New Orleans, LA, January 26–28, 1998.

Background. One factor influencing the choice of mechanical versus bioprosthetic valves is reoperation for bioprosthetic valve failure. To define its operative risk, we reviewed our results with valve reoperation for bioprosthetic valve failure.

Methods. Records of 400 consecutive patients having reoperative mitral, aortic, or mitral and aortic bioprosthetic valve replacement from January 1985 to March 1997 were reviewed.

Results. Reoperations were for failed bioprosthetic mitral valves in 219 patients, failed aortic valves in 153 patients, and failed aortic and mitral valves in 28 patients. Including 26 operations (6%) for acute endocarditis, 153 operations (38%) were nonelective. One hundred nine patients (27%) had other valves repaired or replaced, and 72 (18%) had coronary bypass grafting. The incidence of death in the mitral, aortic, and double-valve groups was respectively, 15 (6.8%), 12 (7.8%), and 4 (14.3%); and the incidence of prolonged postoperative hospital stay (>14 days) was, respectively, 57 (26.0%), 41 (26.8%), and 8 (28.6%). Only 7 of 147 patients (4.8%) having elective, isolated, first-time valve reoperation died. Multivariable predictors (p < 0.05) of hospital death were age greater than 65 years, male sex, renal insufficiency, and nonelective operation; and predictors of prolonged stay were acute endocarditis, renal insufficiency, any concurrent cardiac operation, and elevated pulmonary artery systolic pressure.

Conclusions. Reoperative bioprosthetic valve replacement can be performed with acceptable mortality and hospital stay. The best results are achieved with elective valve replacement, without concurrent cardiac procedures.






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