A living will is one form of advance directive, leaving instructions for treatment. Another form is a specific type of power of attorney or health care proxy, in which the person authorizes someone (an agent) to make decisions on their behalf when they are incapacitated.
Antioxidant vitamins A, C and E may improve blood flow by preventing oxidation of cholesterol, one of the main causative factors in arterial plaque formation, according to a study published in the January 2012 issue of the journal Advances in Clinical and Experimental Medicine..
Another nutrient that may help is vitamin E. It has been shown to thin the blood which passes more effectively through narrowed vessels. Sufferers may benefit from daily doses of between 400 and 1000iu. Herbal medicine offers a number of approaches. Ginkgo biloba, renowned for its blood-flow enhancing effect, is one.