purpose of fluid restriction heart failure
Heart Failure: Watching Your Fluids. Too much fluid in your body can make it harder for your already-weakened heart to pump. Your doctor may prescribe a diuretic to help get rid of excess fluid. He or she may also suggest that you limit liquids so that your body can get rid of the extra water and sodium.
Some people with severe congestive heart failure may require fluid restriction. Basically, two cups (one pint or about 500 cc) of fluid will equal roughly one pound of fluid weight gain.