Aortic Valve Chordae Tendinae causing Aortic Regurgitation In cases of significant aortic regurgitation without endocarditis or significant aortic root dilation, don't forget about... aortic valve chordae tendinae. These are rare, but cause diastolic tethering of the aortic valve leaflets and AR Eli Gelfand, MD, FACC @the_gelf #AorticValve #ChordaeTendinae #echocardiogram #clinical #pocus #tee #AorticRegurgitation