Gary McKinnon. Gary McKinnon was known by his Internet handle, âSolo.â Using that name, he coordinated what would become the largest military computer hack of all time. The allegations are that he, over a 13-month period from February 2001 to March 2002, illegally gained access to 97 computers belonging to the U.S. Armed Forces and NASA.
The atrioventricular valves of the heart are important in preventing backflow. The mitral valve prevents backflow into the left atrium, and the tricuspid valve prevents backfl â¦ ow into the right atrium.
The flaps of the mitral and tricuspid valves open to let blood through. Then, the ventricles contract to pump the blood out of the heart. When the ventricles contract, the flaps of the mitral and tricuspid valves close. They form a tight seal that prevents blood from flowing back into the atria.For more information, go to the Health Topics How the Heart Works article.n MVP, when the left ventricle contracts, one or both flaps of the mitral valve flop or bulge back (prolapse) into the left atrium. This can prevent the valve from forming a tight seal. As a result, blood may leak from the ventricle back into the atrium.