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.
Tricuspid valve regurgitation. In tricuspid valve regurgitation, shown in the heart on the right, the valve between the two right heart chambers (right ventricle and right atrium) doesn't close properly. This situation results in blood flowing back into your heart's upper right chamber (right atrium).A normal heart is shown on the left.ricuspid valve regurgitation. In tricuspid valve regurgitation, shown in the heart on the right, the valve between the two right heart chambers (right ventricle and right atrium) doesn't close properly. This situation results in blood flowing back into your heart's upper right chamber (right atrium).