Ross procedure is an ideal operative modality for diseased aortic valve especially in children, but homogrart for right ventricular outflow tract(RVOT) reconstruction is not easily available in Korea. We tried to perform REV procedure for RVOT reconstruction in 10 young piglets(15.3 $pm$ 1.3 kg) In an attempt to e clude the use of homograft in Ross operation. 3 of them survived after operation and raised till adult pig(about 70 kg), then examined their pulmonary arteries and hearts. Without any stenotic residues in the great arteries, we only found the deformed monocusp patch with severe calcification, which deprived the adequate valve function, but kept the pig growing normally We are sure that this operative modality (REV + Ross procedure) could be extendedly applied to the diseased human aortic valve, but we need to develope the anti-calcification method for the heterograft patch.