About 29% of American adults, or 70 million people, have high blood pressure. High blood pressure was a contributing factor in over 360,000 deaths in 2013, almost 1000 per day. High blood pressure is diagnosed when blood pressure is above 140/90 and increases the risks of heart attack, stroke, heart failure, and kidney disease. While about half of those with high blood pressure have it under control, nearly a third of American adults have prehypertension. High blood pressure costs the US $46 billion annually.