(For more, see the What is being tested? section.) A hemoglobin test may be used to: Screen for, diagnose, and measure the severity of anemia (low RBCs, hemoglobin and hematocrit) or polycythemia (high RBCs, hemoglobin and hematocrit) Monitor the response to treatment of anemia or polycythemia.
Calcium channel blockers prevent calcium from entering into the heart muscle cells, and into the smooth muscle cells that cause blood vessels to constrict. This relaxing effect results in the dilation of blood vessels, and a reduced force of contraction of the heart muscle.
Alternatively, the blocker can specifically block the write commands and let everything else through. Write blockers may also include drive protection which will limit the speed of a drive attached to the blocker. Drives that run at higher speed work harder (the head moves back and forth more often due to read errors).