New challenge to blood pressure heart health

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A new study finds both blood pressure numbers predict a person's risk of heart attack and stroke.
The findings challenge the long-held belief that only systolic blood pressure, the top number, affects heart health.
Researchers from Kaiser Permanente looked at 36-million blood pressure readings from over one million people.
They found that while systolic pressure did have a greater impact, both numbers strongly influenced the risk of heart attack or stroke.
The study was led by researchers at Kaiser Permanente and published in 'New England Journal of Medicine'.
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