6.5.4 Aortic 'stenosis'
Some confusion arises over the term aortic 'stenosis'. This description is used by some authors to describe the degenerative nodular change which commonly affects the aortic valve. While it is possible that these nodules could result in turbulent flow, generating a murmur, it appears to be very rare that they are sufficiently large to produce a significant functional narrowing of the valve. Murmurs associated with these nodules would sound like flow murmurs, but there is no evidence that they have any significant deleterious effect on cardiac function in fact they may be found in animals with no murmurs at all.