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GOLDEN VALLEY, Minn. - When it comes to blood pressure, a new study says it's no longer just about high numbers.

Blood pressure that increases over time, between early adulthood and middle age, also indicates a higher risk of developing heart disease. That's according to a new study in the Journal of the American Medical Association.

Dr. Rob Schwartz is a cardiologist with the Minneapolis Heart Institute at Abbott Northwestern.

He said, "The increase over time, in fact, refines the already known risk factor of blood pressure. So now it's not just blood pressure but it's also the change specifically the increase in blood pressure that is important."

The study also showed those with an increasing blood pressure had a four times higher risk of calcium forming in the arteries which can lead to heart attacks.

So Schwartz said it's important to monitor blood pressure, and any changes, starting at a young age, and then make efforts to get increasing blood pressure under control.