Single raphe bicuspid aortic valve Bicuspid aortic valve with left-noncoronary cusp fusion 2017-06-10T12:04:18Z A type of bicuspid aortic valve (BAV) characterized by a single raphe between the left and noncoronary cusps (LN fusion pattern). There is thus one completely developed right cusp, two completely developed commissures, and one raphe between the underdeveloped left and noncoronary coronary cusps extending to the corresponding malformed commissure.