En español l It sounded like great news for thousands of older people: New blood pressure guidelines might free them from the anxiety of taking powerful medications to control their blood pressure, and the side effects those pills sometimes brought.
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But almost immediately, several members of the panel of medical experts recommending the change strongly dissented and warned that the new guidelines could endanger some people.
The result has been confusion similar to that created late last year with the muddled rollout of new guidelines for using cholesterol-lowering statin drugs.
The controversy began when a panel of 17 national experts announced in December that, based on a five-year analysis of the best available research, the target for treating high blood pressure should be nudged a little higher for those age 60-plus and for those with diabetes or kidney disease. Its findings were published in the Journal of the American Medical Association.
The American Heart Association has also resisted the change, saying that it could undermine recent progress in reducing deaths from these conditions.
"Hypertension is such a strong risk factor, especially if you have other diseases. This is not the time to loosen control over blood pressure," says the group's president, Mariell Jessup, M.D., medical director of the University of Pennsylvania's heart and vascular center.
Guidelines from the previous panel in 2003 defined high blood pressure in older adults as 140/90 or above, meaning that's the threshold for taking medication to bring those numbers down. (The top number represents the pressure inside the arteries when the heart beats, and the bottom number is the pressure between beats, when the heart rests.)
The new guidelines change nothing if you're younger than 60. But if you're 60 or older, the target has moved up: Your goal is to keep your blood pressure at 150/90 or lower. If you have kidney disease or diabetes, your target used to be 130/80 or lower; now it's 140/90 or lower.
Raymond R. Townsend, M.D., director of the hypertension program at the University of Pennsylvania and a member of the panel that wrote the new guidelines, says that the change is based on the best available data from randomized controlled trials, considered the gold standard for scientific evidence.
But every patient is different, he says. And while "some will be better off with blood pressure at 130, others whose blood pressure is running 140 to 146, and [who are] already on 11 medications, don't need to add a 12th pill to lower their blood pressure to 138. A doctor's judgment trumps guidelines."
The dissenting panel members, however, say the evidence isn't strong enough to support raising the bar from 140 to 150 for everyone older than 60.
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