We performed aortic remodeling using a tailored Dacron graft (Yacoub's procedure) in two cases of root aneurysm combined with aortic regurgitation. The cases were 20-year-old and 45-year-old women. The leaflets did not coapt at a central portion, but the lack of coaptation did not produce significant prolapse. No organic change was found, so we attributed aortic regurgitation to sinotubular junction. Remodeling of the root was selected as the operative procedure because degeneration in the annulus was unlikely in these two cases. All three sinuses were excised, with 3mm of the arterial wall left above the aortic annulus and a small button of the aortic wall around the ostia of the coronary arteries. Then each commissure was pulled up and the height of the commissure was measured. The proximal end of the graft was then tailored to a scallop shape, so that the top of the scallop matched the commissure level. The graft was then sutured to the aortic rim with continuous 5-0 polypropylene sutures. Both coronary arteries were reimplanted utilizing the Carrel patch method and the distal graft anastomosis was completed. The aortic crossclamp times were 147 minutes and 163 minutes and the total pump times were 166 minutes and 189 minutes. One patient has mild or 1+ aortic regurgitation on postoperative echocardiogram and aortography, but she has no activity restrictions, and no evidence of congestive symptoms. Yacoub's remodeling procedure which spares the aortic valve, requires no anticoagulant therapy in the post-operative period. Aortic valve-sparing replacement of the aortic root is an excellent procedure for any patient with an ascending aneurysm and an anatomically salvageable valve. Although further long-term follow-up is required, we believe that preserving the native aortic valve is useful for preventing complications associated with mechanical valves.