Root replacement for all allograft aortic valves: preferred technique or too radical?

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Transplantation Immunology

Background:

• Aortic root replacement is a complex procedure.
• Cryopreserved allografts are utilized for aortic root reconstruction.
• Long-term outcomes of aortic root replacement with allografts require evaluation.

Purpose of the Study:

• To assess the long-term outcomes of aortic root replacement using cryopreserved allografts.
• To compare the results of aortic root replacement with non-root allograft implantation techniques.
• To evaluate the safety and efficacy of cryopreserved allografts in aortic surgery.

Main Methods:

• Retrospective analysis of 146 patients undergoing aortic root replacement with cryopreserved allografts from November 1985 to January 1994.
• Complete follow-up to March 1st, 1994, including all recorded events.
• Actuarial survival analysis and assessment of morbidity events such as endocarditis, thromboembolism, structural deterioration, and reoperation.

Main Results:

• Operative mortality was 1.7%, with an 8-year actuarial survival of 85% +/- 8%.
• Low incidence of endocarditis (2 events) and thromboembolism (4 events).
• Low morbidity with 3 events of structural deterioration and 9 reoperations for all causes.

Conclusions:

• Aortic root replacement with cryopreserved allografts demonstrates superior immediate valve function.
• At 8 years, no statistical difference in outcomes was observed compared to non-root procedures.
• Longer follow-up is necessary to definitively determine the preferred technique for aortic root replacement.