The American Heart Association released new guidelines for diagnosing and managing high blood pressure in November, 2017, and many people are confused about what the new guidelines mean for their health. 

The new guidelines shift the definition of hypertension to blood pressure greater than 130 over 80 mmHg for adults, rather than the old value of 140 over 90 mmHg. 

Matthew Tattersall, DO, assistant professor (CHS), Cardiovascular Medicine, explained why. 

"One of the things we've learned from many studies over the years is that the risk of heart attack and stroke really increases from the top number - the systolic number - for 115 and up. For every 20 points higher for that top number, your risk of heart attack and stroke doubles," he said.

About 46 percent of US adults will now be defined as having high blood pressure as a result of the new definition, but Dr. Tattersall explained that the guidelines are intended to make people aware of levels of actual risk. He also described best practices for self-monitoring one's own blood pressure at home.

Resources:

• "Clearing up confusion: Looking at the new blood pressure guidelines," WISC-TV, January 24, 2018
• UW Health Advanced Hypertension Program