From the Centers for Disease Control and Prevention (CDC)
Vital Signs: Getting Blood Pressure Under Control
About 67 million adults have high blood pressure. More than half (36 million) have uncontrolled high blood pressure. High blood pressure is a major risk factor for heart disease and stroke, the first and fourth leading causes of death in the United States.
Watch this short video so you better understand blood pressure, what the top (systolic) and bottom (diastolic) numbers mean and how to keep it under control.