Definition. Aortic valve regurgitation â or aortic regurgitation â is a condition that occurs when your heart's aortic valve doesn't close tightly. Aortic valve regurgitation allows some of the blood that was just pumped out of your heart's main pumping chamber (left ventricle) to leak back into it.efinition. Aortic valve regurgitation â or aortic regurgitation â is a condition that occurs when your heart's aortic valve doesn't close tightly. Aortic valve regurgitation allows some of the blood that was just pumped out of your heart's main pumping chamber (left ventricle) to leak back into it.
Prosper, Texas. Prosper is an affluent suburban town located in Collin and Denton counties within the state of Texas, United States. The town is located within the Dallas-Fort Worth metropolitan area. As of the 2010 census, the population was 9,423; As of 2017, the estimated population was 21,685.
Its county seat is Longview. The county is named after John Gregg, a Confederate general killed in action during the American Civil War. Gregg County is part of the Longview, TX Metropolitan Statistical Area as well as the LongviewâMarshall, TX Combined Statistical Area. Discovery of oil near Kilgore, Texas in October 1920 was the beginning of an oil boom that attracted workers to the county and expanded the population by more than 500% by 1940, according to the census.