Federal employees are compensated according to government-regulated pay scales. More than 70 percent of federal employees are paid according to the most common pay scale, the General Schedule (GS) , but there are a variety of alternative pay schedules as well.
Four heart valves control the flow of blood through the heart. They act as one-way doors, opening to let blood exit or enter a chamber, then closing to keep blood from flowing backward. 1  The tricuspid valve controls blood flow from the right atrium to the right ventricle.
There are four valves in your heart including the mitral, tricuspid, aortic and pulmonic valves. The aortic valve is located between the left ventricle (lower heart pumping chamber) and the aorta, which is the largest artery in the body.Valves maintain one-way blood flow through the heart. 1  Click here to learn more about the heart valves.ortic valve disease occurs when the aortic valve does not work correctly. This can be caused by: 1  Aortic valve stenosis: These stiff, fused, thickened, inflexible valve leaflets lead to the narrowing of the aortic valve, that limits the blood flow.