For the first time in 14 years, the American Heart Association and the American College of Cardiology redefined high blood pressure as a reading of 130 over 80, down from 140 over 90.
The change means that 46 percent of U.S. adults, many of them under the age of 45, will now be considered hypertensive.
KUSI was joined by Doctor Sara Siavoshi with more.
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