of the normal aortic valve.
AMBL= anterior mitral valve leaflet; Ao= aorta;
AV= aortic valve; LV= left main; N= noncoronary cusp; LA= left atrium;
R= right; RC= right coronary artery. Arrows point to line of closure.
Portion of aortic cusp above the line of closure is called the lunula.
BF Waller: Morphologic aspects of valvular heart disease: Part I. Curr
Prob Cardiol IX:13, 1985.