High blood pressure: Causes, symptoms.

High blood pressure: Causes, symptoms. If a person has high blood pressure it means that the walls of the arteries are receiving too much pressure repeatedly - the pressure needs to be chronically elevated for a diagnosis of hypertension to be confirmed. In medicine, chronic means for a sustained period; persistent. In the United States, approximately 85 million people have high blood pressure - about 1 in every 3 adults over 20, according to the American Heart Association. The National Institutes of Health (NIH) estimate that about two-thirds of people over the age of 65 in the U.S. have high blood pressure. If left untreated or uncontrolled, high blood pressure can cause many health problems. These conditions include heart failure, vision loss, stroke, and kidney disease. What is high blood pressure? The heart is a muscle that pumps blood around the body constantly - during every second of our lives. Blood that has low oxygen levels is pumped ...