When you have aortic valve regurgitation, the aortic valve doesn't close as it should. With each heartbeat, some of the blood leaks back (regurgitates) through the aortic valve into the left ventricle. The body does not get enough blood, so the heart has to work harder to make up for it.he most common causes of sudden (acute) aortic valve regurgitation include: 1  Endocarditis, which is an infection in the heart. 2  Aortic dissection, which means that the inner layer of the aorta separates from the middle layer. 3  Problems with a replacement (artificial) aortic valve. 4  Trauma to the heart valve or aorta.
A sister refers to the female offspring of one's parent. The term sister comes from Old Norse systir which itself derives from Proto-Germanic *swestÄr, both of whom have the same meaning, i.e. sister.Some studies have found that sisters display more traits indicating jealousy around their siblings than their male counterparts, brothers.he term sister comes from Old Norse systir which itself derives from Proto-Germanic *swestÄr, both of whom have the same meaning, i.e. sister. Some studies have found that sisters display more traits indicating jealousy around their siblings than their male counterparts, brothers.
If you are a boy: Advantages-your sister can introduce you to her friends; You can pull on her hair; you can ask her about how girls think, and what kinds of things they like (they don't like to have their hair pulled).irst of all A girl is more emotional than boy so having a sister is very very much beneficial because being girl she always deeply emotionally attached with you, she can take care of your as a mother also (if elder sister), She will stand for you in whole life even after your parents is not in the world.