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.
The mitral valve regulates the flow of oxygen rich blood from the lungs to pass from the left atrium to the left ventricle.There are two main diseases or malfunctions of heart valves: regurgitation (valve does not close tightly) and stenosis (valve does not open fully).itral Valve Regurgitation, Stenosis, and Prolapse. The mitral valve is referred to as atrioventricular valves because it is located between the left atria and the left ventricle.