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.
Print. Mitral valve regurgitation â also called mitral regurgitation, mitral insufficiency or mitral incompetence â is a condition in which your heart's mitral valve doesn't close tightly, allowing blood to flow backward in your heart.or mild leakage, treatment may not be necessary. You may need heart surgery to repair or replace the valve for severe leakage or regurgitation. Left untreated, severe mitral valve regurgitation can cause heart failure or heart rhythm problems (arrhythmias).