Matsumoto M, Miki S, Kusuhara K, Ueda Y, Ohkita Y, Tahata T, Komeda M
Jpn Circ J. 1985 Feb;49(2):190-1. doi: 10.1253/jcj.49.190.
A 57-year old man with severe aortic regurgitation was found to have a quadricuspid aortic valve. Aortic valve replacement was performed successfully with a St. Jude Medical prosthetic valve. On histological examination, the resected cusps showed fibrotic thickening with calcification.