Now, following the above steps: 1  The parent hydrocarbon chain has 23 carbons. It is called tricosa-. 2  The functional groups with the highest precedence are the two ketone groups. The groups are on carbon atoms 3 and 9. 3  The side chains are: an ethyl- at carbon 4, an ethyl- at carbon 8, and a butyl- at carbon 12.
1 doctor agreed: 1  AORTIC REGURGITATION: Aortic regurgitation is reflux of blood through an incompetent aortic valve into the left ventricle during ventricular diastole (relaxation). During ventricular systole (contraction), blood is pumped from the left ventricle into the aorta. Because of a leaky aortic valve, the pumped blood returns to the left ventricle.
The aortic valve regulates the blood flow from the heart's lower-left chamber (the left ventricle) into the aorta. The aorta is the main vessel that supplies blood to the rest of the body.Two diseases of the aortic valve are regurgitation and stenosis.Aortic regurgitation. Aortic regurgitation is also called aortic insufficiency or aortic incompetence. It is a condition in which blood flows backward from a widened or weakened aortic valve into the heart's lower chamber (the left ventricle).he aortic valve regulates the blood flow from the heart's lower-left chamber (the left ventricle) into the aorta. The aorta is the main vessel that supplies blood to the rest of the body.