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[Mid-term evaluation of cryopreserved aortic allograft]
H Machida1, K Eishi, S Nakajima
1Department of Surgical Research, National Cardiovascular Center Research Institute, Osaka, Japan.
The Japanese Journal of Thoracic and Cardiovascular Surgery : Official Publication of the Japanese Association for Thoracic Surgery = Nihon Kyobu Geka Gakkai Zasshi
|April 29, 1998
Summary
Cryopreserved allografts show excellent mid-term function for aortic valve replacement. Steroid use may increase calcification risk in allograft walls, warranting further investigation for aortic procedures.
Area of Science:
- Cardiovascular Surgery
- Thoracic Surgery
- Cardiac Transplantation
Context:
- Aortic root replacement and free-hand aortic valve replacement using cryopreserved allografts are established procedures.
- Potential complications include structural valve degeneration and allograft dilatation.
- Mid-term outcomes of these procedures require ongoing evaluation.
Purpose:
- To evaluate the mid-term function of cryopreserved allografts used in aortic root replacement and free-hand aortic valve replacement.
- To assess the incidence of allograft degeneration and calcification in patients undergoing these aortic valve procedures.
Summary:
- Three patients underwent aortic root replacement or free-hand aortic valve replacement with cryopreserved allografts between 1992 and 1994.
- Postoperative echocardiography demonstrated excellent valve function in all cases.
- Chest CT revealed allograft wall calcification in one patient on steroid therapy at 15 months, but not in another at 17 months.
Impact:
- This study provides mid-term functional data on cryopreserved allografts in complex aortic surgeries.
- Findings suggest a potential link between steroid use and allograft calcification, impacting long-term outcomes.
- Highlights the need for careful patient selection and monitoring in aortic valve allograft recipients.