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Aortic regurgitation (AR), also known as aortic insufficiency (AI), is the leaking of the aortic valve of the heart that causes blood to flow in the reverse direction during ventricular diastole, from the aorta into the left ventricle. As a consequence, the cardiac muscle is forced to work harder than normal.
The Austin Flint murmur is named after the 19th century American physician, Austin Flint (1812–1886). [8] He disapproved of associating any physical sign with the name of the original describer, and wrote, "So long as signs are determined from fancied analogies, and named from these or after the person who describes them, there cannot but be obscurity and confusion."
The exact cause of an Austin Flint murmur is unknown. Hypothesis is that the mechanism of murmur is from the severe aortic regurgitation. In severe aortic regurgitation the jet vibrates the anterior mitral valve leaflet. This causes collision with the mitral inflow during diastole. As such, the mitral valve orifice narrows.
Patients with aortic regurgitation will have an early decrescendo diastolic murmur, caused by the blood flowing back through the valve. Since blood’s leaking back from the aorta into the left ventricle, the left ventricular blood volume increases which increases the stroke volume or the amount that the left ventricle pumps out during ...
Duroziez's sign is a sign of aortic insufficiency. [1] It consists of an audible diastolic murmur which can be heard over the femoral artery when it is compressed with the bell of a stethoscope.
The presence of this murmur is a good positive predictor for AR and the absence of this murmur strongly suggests the absence of AR. An Austin Flint murmur is usually associated with significant aortic regurgitation. Early diastolic Pulmonary regurgitation: Pulmonary regurgitation is most commonly due to pulmonary hypertension (Graham-Steell ...
Regurgitation through the aortic valve, if marked, is sometimes audible to a practiced ear with high quality, especially electronically amplified, stethoscope. Generally, this is a very rarely heard murmur, even though aortic valve regurgitation is not so rare.
1 Aortic regurgitation: causes. 2 Aortic stenosis characteristics. ... RIght sided murmurs louder with Inspiration. [1] p. 32. Murmurs: questions to ask.
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