1 Prophylaxis against dexamethasone associated ulceration: 0.031-1.25 mg/kg/hr during dexamethasone therapy to maintain gastric pH >4.  Prophylaxis against stress ulceration: 2 mg/kg q12hr or 1.5 mg/kg IV q8hr; alternativley, 2 mg/kg over 10 min, followed by continuous infusion of 0.083 mg/kg/hr.
The heart is a muscular pump that pushes blood through blood vessels around the body. Essential to life, the heart beats continuously, pumping the equivalent of more than 14,000 litres of blood every day. Blood vessels form the living system of tubes that carry blood both to and from the heart.
Arteries and veins carry blood around your body. Arteries take blood away from your heart, delivering it to your organs and muscles. Veins bring blood back to your heart from those same organs and muscles. Your main arteries include the coronary arteries of your heart, the carotid and cerebral arteries of your brain, and the peripheral arteries, which stretch out into your limbs.