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Extcraion A«mt, Home Economic*
When checking someone’s blood pressure, physicians frequently home in on the second of the two numbers - say, the “80” in “120 over 80” - as the “important” indicator of whether the pressure is high enough to pose the risk of a heart attack or stroke. Their thinking makes sense. The first number represents the strong pressure exerted as the heart contracts to pump blood to all the arteries throughout the body and is therefore going to be relatively high as a matter of course. The second number represents the pressure exerted by the blood on the walls of the arteries between beats. If that number is elevated, it means the arteries, or blood vessels, are under great pressure even when the heart is relaxed and simply filling with blood in preparation for its next beat. Known as diastolic pressure, the second number if generally considered high above 90. That’s when a doctor will advise a blood pressurelowering change in lifestyle habits, sometimes coupled with medication.
A growing body of evidence, however, suggests that an elevated first number, known as systolic pressure, is also a cause for concern, even if it is the only one of the two numbers that runs high. Consider the findings of the researchers work
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