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Eur J Cardiothorac Surg 2003;23:996-1001
© 2003 Elsevier Science NL

Reoperation after fresh homograft replacement: 23 years’ experience with 655 patients

Department of Cardiovascular Surgery and Transplantology, Collegium Medicum, Jagiellonian University, Pradnicka 80, 31-202 Krakow, Poland

Received 25 September 2002; received in revised form 12 February 2003; accepted 19 February 2003.

^* Corresponding author. Tel.: +48-502-294250; fax: +48-12-423-3900
e-mail: cool_chris{at}interia.pl

Objective: Through a retrospective study on the use of fresh homografts in 655 aortic valve replacement patients over a period of 23 years, we aimed to assess the reasons for eventual reoperation and causes of valve dysfunction. Methods: Between January 1980 and December 2002, 655 patients received fresh homografts. All homografts were antibiotic sterilized and stored at 4 °C. During this time, 139 patients (116 male and 23 female) with a mean age of 46.7 years (range 18–72) required reoperation. Results: The 30-day hospital overall mortality was 2.87%. The mean durability for all homografts was 12.4±4.54 years (1 month to 23 years). The cumulative rates for freedom from reoperation for any cause were 94.09±2% at 5 years and 87.9%±4% at 10 years, 76.6 at 15 years, 49.55 at 20 years. The major cause of valve dysfunction and indication for reoperation was degeneration in 111 patients (79.8%). Predominant aortic valve insufficiency in 87 patients (62.5%) and predominant stenosis in 24 patients (17.26%). Endocarditis occurred in 21 patients (15.1%). Early endocarditis was diagnosed in five patients (3.59%), late endocarditis in 16 patients (11.5%). Additional causes for reoperation included ascending aortic aneurysm, mitral valve insufficiency and congestive cardiomyopathy. Seventeen patients (12.2%) required concomitant procedures. Coronary artery bypass grafting was performed in six cases (4.3%), mitral valve replacement in five cases (3.59%), mitral valve annuloplasty in six (4.3%). The primary reoperative procedure was artificial/mechanical aortic valve implantation. In five cases, St. Jude Medical conduit grafts were implanted due to ascending aortic aneurysms. Homograft reimplantation was performed in four cases. One patient underwent mitral valve replacement and one patient received a heart transplant. Conclusion: The results of the study suggest that reoperation in patients with aortic homografts is a low-risk procedure as compared to alternative therapies. Primary allograft aortic valve replacement can give acceptable results for up to 23 years. The major cause of valve dysfunction and indication for reoperation was degeneration. Cumulative rates for freedom from reoperation for any cause in age groups suggest careful selection and indications in homograft implantation in the younger patients. Young age is a risk factor for an early homograft structural deterioration (degeneration).

Key Words: Homograft • Homograft degeneration • Homograft reoperation

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