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A Study of Aortic Vasculopathy after Cardiac Allograft  

Chung, Won-Sang (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Chung, Yoon-Sang (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Kim, Young-Hak (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Kim, Hyuck (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Kang, Jeong-Ho (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Paik, Seung-Sam (Department of Pathology, Hanyang University College of Medicine)
Song, Dong-Seop (Department of Thoracic and Cardiovascular Surgery, Sanbon Hospital, College of Medicine, WonKwang University)
Jang, Hyo-Jun (Department of Thoracic and Cardiovascular Surgery, Hanyang University Medical Center, Hanyang University College of Medicine)
Publication Information
Journal of Chest Surgery / v.42, no.2, 2009 , pp. 135-140 More about this Journal
Abstract
Background: Chronic rejection after a cardiac allograft usually occurs about six months after the operation. Vasculopathy due to chronic rejection causes atherosclerosis in the coronary artery of the transplanted heart and then this causes myocardial injury. We intended to discover and document those findings that occur in a transplanted ascending aorta. Material and Method: In rats weighting $200{\sim}300gm$ (Spraque-Dawley rat), we carried out heterotopic heart allo-transplantation with the modified Ono-Lindsey method and then the rats were administrated cyclosporine (10mg/kg/day). After three months survival, we acquired biopsy materials from the native ascending aorta and the allo-transplanted ascending aorta and we compared them. We classified each severity of 1) intimal thickening, 2) medial hyperplasia, 3) medial calcification, 4) medial inflammation and 5) chondroid metaplasia, which are specific biopsy findings for chronic rejection after a cardiac allograft. Each severity was classified, according to the opinion of one pathologist, in the native ascending aorta biopsies (n=9) and the allo-transplanted ascending aorta biopsies (n=13). The data of the control group and the study group were statistically analyzed with using the Mann-Whitney test (SPSS version 12.0 window). Result: The important changes of the allo-transplanted aorta were intimal thickening (p<0.0001), medial calcification (p=0.045), medial inflammation (p<0.0001) and chondroid metaplasia (p=0.045), but not medial hyperplasia (p=0.36). Conclusion: Cardiac allograft vasculopathy was seen in the transplanted ascending aorta, the same as was seen in the coronary artery, after allograft cardiac transplantation. We have reached the conclusion that chronic rejection also progresses in the aorta.
Keywords
Heart transplantation; Allograft; Rejection; Aorta;
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