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a Cardiac Surgery Department, San Donato Hospital, Milan, Italy
b Department of Critical Care Medicine, University of Florence, Florence, Italy
Accepted for publication December 6, 2007.
* Address correspondence to Dr Di Donato, Cardiac Surgery Department, San Donato Hospital, Via Morandi 30, San Donato Milanese, Milan, 20097, Italy (Email: marad{at}tin.it).
Background: This study analyzed morbidity, mortality, and quality of life after aortic valve replacement with mechanical and biologic prostheses in octogenarian patients.
Methods: A retrospective analysis was performed in 345 consecutive patients, mean age of 82 ± 2 years (range, 80 to 92), who had aortic valve replacement from May 1991 to April 2005. A bioprosthesis (group I) was used in 200 patients (58%), and 145 (42%) received a mechanical prosthesis (group II). Associated cardiac procedures were done in 211 patients (61%), of which 71% were coronary artery bypass grafting. Patients had symptomatic aortic stenosis (84.3%) or associated aortic insufficiency; 88% were in New York Heart Association (NYHA) class III or IV. The mean preoperative aortic valve gradient was 62 ± 16 mm Hg (range, 25 to 122 mm Hg). The mean left ventricular ejection fraction was good (0.52 ± 0.12); 30 patients (8.7%) had an ejection fraction of less than 0.30.
Results: The in-hospital mortality rate was 7.5% (26 patients); 17 (8.5%) in group I and 9 (6.2%) in group II (p = 0.536) Significant predictors of operative mortality were preoperative renal insufficiency (blood creatinine > 2.00 mg/mL) and need for urgent operation. Mean follow-up, complete at 100%, was 40 ± 33 months (range, 1 to 176 months). Long-term follow-up, using Kaplan-Meier analysis, showed an overall survival of 61% at 5 years and 21% at 10 years; survival by type of prosthesis was significantly higher with mechanical prostheses (log-rank p = 0.03). Freedom from cerebrovascular events (thromboembolic/hemorrhagic) at 5 and 10 years was 89% and 62% in the mechanical group and 92% and 77% in the biologic group (p = 0.76). Postoperative NYHA functional class was I or II in 96% of patients. Quality-of-life scores were excellent considering the age of the patients. No differences were found between the two groups.
Conclusions: Surgical treatment for symptomatic aortic stenosis in octogenarians has an acceptable operative risk with excellent long-term results and good quality of life. In this cohort, survival rate is slightly but significantly higher with mechanical prostheses.
Related Article
Ann. Thorac. Surg. 2008 85: 1301-1302.
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