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Surgical findings during operation. Severe degeneration (thickening, shortening, and whitish changes due to fibrosis) of the aortic valve, which was prominent in the left coronary aortic leaflet, and the wall of the sinuses of Valsalva was directly confirmed. Refer to Figures 3 and 4. L: left coronary aortic leaflet, N: non-coronary aortic leaflet, R: right coronary aortic leaflet
