Texas Heart Institute Home
Continuing Medical Education
 
CME Home
Listen to podcast
 
 
 
 
 
Browse CME
 
 

 
 
| Share
 

Heart Sounds Podcast Series
Aortic Insufficiency

 



The classic example of a semilunar insufficiency murmur is aortic regurgitation. The murmur of aortic insufficiency is caused by turbulence of blood regurgitating through an incompetent aortic valve from the aorta to the left ventricle. This produces a high-pitched decrescendo murmur, which begins with the second heart sound (S2), lasts through some or all of diastole and declines in intensity as the aortic pressure falls. It tends to equilibrate with the left ventricular pressure. Large volume aortic valve regurgitation is accompanied by a wide aortic pulse pressure and with a rapid rising and collapsing systemic pulse.  

Aortic Regurgitation

If aortic regurgitation is severe, a third heart sound will be heard at the apex along with a low-pitched, vibratory mid-diastolic rumbling murmur. Referred to as the Austin Flint rumble, this murmur is due to competing jets of blood entering the ventricle from the regurgitant aortic valve and from the left atrium. The murmur may have presystolic accentuation, and may mimic the murmur of mitral stenosis. 

Return to Heart Sounds Podcast Series


Updated March 2009
 
Find Us on Facebook!

Please contact our Webmaster with questions or comments.
Terms of Use and Privacy Policy
� Copyright Texas Heart Institute. All rights reserved.
Texas Heart Institute, Texas Heart, Texas Heart Institute Journal, THI, Heart Owner's, Leading With the Heart and Heart of Discovery are members of the
family of trademarks of the Texas Heart Institute.


U.S. NEWS America's Best Hospitals 2012-13