This document discusses hypertension (high blood pressure) prevalence, complications, treatment benefits, and control rates in various countries. It reports that over 50 million Americans have high blood pressure, the leading cause of stroke, heart disease and kidney failure. Treating hypertension can significantly reduce risks of these conditions. However, control rates remain low, even in countries where diagnosis and treatment rates are higher. Later guidelines recommend starting treatment with ACE inhibitors, ARBs, calcium channel blockers or thiazide diuretics depending on patient factors.