This program looks at hypertension, identifying some of its causes and explaining why it is known as the "silent killer." Profiling two brothers who both need to control their high blood pressure, the program shows how different patients respond to different ways of reducing blood pressure: diet, exercise, not smoking, and medication. The program explains that doctors can’t always identify the cause for hypertension, but must be content to treat it, knowing that treating hypertension greatly reduces the risks of the disease. (18 minutes)