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Roll up both sleeves for blood pressure readings
30 January 2012
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Measuring the difference in systolic blood pressure in both arms could identify people at risk of narrowing of the arteries (peripheral arterial disease), according to a review of research published in the journal, The Lancet.
This review of research found that a difference in systolic blood pressure between both arms of 10mmHg (millimetres of mercury) or more, was associated with peripheral arterial disease. This is a disease of the arteries where they become narrowed, which can restrict blood flow to the muscles in the limbs.
Interestingly, some of the studies included in the review reported a presence of cerebrovascular disease when there was a difference of 15mmHg or more. These are conditions caused by problems with the blood vessels supplying the brain, and can lead to conditions such as a stroke.
The authors conclude that measuring people’s blood pressure simultaneously on both arms could help identify those at risk of peripheral arterial disease. It could also allow for the opportunity to treat those who need it to prevent the condition from getting worse.
Dr Prerna Sharma, Senior Physician, Bupa Health and Wellbeing UK, commented: “This review supports existing guidelines – that blood pressure should be checked in both arms. Measuring any differences in blood pressure in both arms could, as the researchers point out, identify those at risk early on.
“Most of the studies included in this review only looked at people who were already at a high risk of heart disease, such as those with diabetes or high blood pressure, rather than the general population. Though the results focus on those with a known risk of heart disease, it’s still a useful way to identify people at a high risk who may not realise it.
“Most importantly there was inconsistency across the studies with how blood pressure was measured. For example, not all studies took repeated simultaneous measurements; therefore the differences in systolic blood pressure can’t be accurately and directly compared from one study to another.
“Essentially it’s important to have your blood pressure checked regularly. A healthy blood pressure level is under 140/85mmHg. However, if you have diabetes or cardiovascular disease, your reading should ideally be less than 130/80mmHg. If your blood pressure is high, there are several things you can do to help yourself in addition to getting treatment from your GP. Stopping smoking, losing excess weight, exercising regularly and following a healthy, balanced diet with reduced salt intake, will all help to lower your blood pressure.”
This review of research looked at 20 studies published before July 2011. Eligible studies in this review had to show differences in systolic blood pressure between arms among adults and have information about those who had heart disease or those who died.
Produced by Natalie Heaton, Bupa Health Information Team
Key facts
- Blood pressure is expressed as two numbers, a normal reading being no higher than 140/85mmHg.
- The first figure refers to the systolic blood pressure, which is a measure of the pressure in your blood vessels when your heart is contracting and pumping blood. This is the highest pressure in your blood vessels.
- The second figure, diastolic blood pressure, is the pressure in your blood vessels between heart beats when your heart is resting and filling with blood.
- A stroke happens when the blood supply to your brain is cut off. If your brain doesn't get enough blood to provide the oxygen and nutrients it needs, your brain cells will become damaged or die.
How can we help you?
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Get checked out with a Bupa Health Assessment. Our assessments are designed to help you understand and manage your health. Call 0845 600 3458 quoting ref HFS100 to book an appointment today.
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Read the study
Clark CE, Taylor RS, Shore AC, et al. Association of difference in systolic blood pressure between arms with vascular disease and mortality: a systematic review and meta-analysis. The Lancet 2012; online 30 January. www.thelancet.com
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