نتایج جستجو برای: fresh homograft
تعداد نتایج: 58239 فیلتر نتایج به سال:
Homograft valve replacement of the diseased aortic valve with a homologous aortic valve inserted in the sub-coronary position was first performed in July 1962 (Ross 1962). The procedure of transferring the patients autologous pulmonary valve to the aortic position has been used since 1967 (Ross 1967). The long term performance of homograft vaives has not been regarded as satis facrory in some c...
BACKGROUND Few studies have explored the long-term function of cryopreserved homograft valves used for reconstruction of the right ventricular tract (RVOT) in patients with congenital heart disease. METHODS AND RESULTS Among 205 patients receiving cryopreserved homografts for reconstruction of the RVOT between November 1985 and April 1999, the outcome of 220 homografts in 183 operative surviv...
OBJECTIVE Since 1992, homografts have been implanted in our institution. After initial sub-coronary implantation of the homograft, our preferred technique for aortic-valve replacement with homografts became root replacement, which poses a surgical challenge whenever redo procedures are necessary. The aim of the present study was to evaluate the outcome after homograft redo surgery, based on pro...
AIMS Homografts are frequently implanted in patients with tetralogy of Fallot (TOF). However, the lifespan of homografts is shorter than that of graft recipients, thus making surgical re-intervention unavoidable. Therefore, to determine variables that could influence their survival, we retrospectively studied the survival pattern of homografts used to treat TOF. METHODS AND RESULTS Sixty-eigh...
OBJECTIVE Aortic homografts offer many advantages over prosthetic valves. However, homograft dysfunction due to degeneration or infection may lead to reoperation. Aortic valve replacement in patients who have undergone previous aortic root replacement with an aortic homograft remains a technical challenge. To assess reoperation events a retrospective review was conducted. MATERIALS AND METHOD...
The clinical and haemodynamic responses to mitral valve replacement were studied in 36 patients with a pulmonary vascular resistance of4 units or above. In ig patients, I3 women and 6 men (mean age 49-7 years) Starr-Edwards prostheses were used. In I7 patients, 7 women and IO men (mean age 53 6 years) fresh unstented aortic homografts were inserted. In the latter group, 3 patients had, in addit...
Ever since the early days of homograft implantation in 1956, and the introduction into clinical practice by Ross and Barrat Boyes, homograft heart valves have proven to have many advantages. Its disadvantages became evident during long-term follow up. Factors, such as donor and recipient morbidity, tissue banking techniques, and the often complex surgical technique required to implant, are of g...
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