High blood pressure (hypertension)

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  • With Mayo Clinic emeritus hypertension specialist

    Sheldon G. Sheps, M.D.

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Question

Blood pressure: Can it be higher in one arm?

When I measure my blood pressure at home, I've noticed that the reading is always higher in one arm. Should I be concerned?

Answer

from Sheldon G. Sheps, M.D.

Generally, a small difference in blood pressure readings between arms isn't a health concern. However, a difference of more than 20 millimeters of mercury (mm Hg) for systolic pressure (top number) or more than 10 mm Hg for diastolic pressure (bottom number) may be a sign of an underlying problem — such as narrowing of the main arteries to that arm. If you have a significant difference in blood pressure readings between arms, talk to your doctor.

Your doctor may measure your blood pressure in both arms to see if you have high blood pressure (hypertension). If your blood pressure is higher in one arm, your doctor will probably use the blood pressure reading from that arm to monitor your blood pressure.

A large difference in blood pressure measurement between your arms could signal a health problem, such as:

  • Blocked arteries in your arms (peripheral artery disease)
  • Kidney disease
  • Diabetes
  • Heart defects
Next question
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References
  1. Agarwal R, et al. Prognostic significance of between-arm blood pressure differences. Circulation. 2008;51:657.
  2. Eguchi K, et al. Consistency of blood pressure differences between the left and right arms. Archives of Internal Medicine. 2007;167:388.
  3. Sheps SG (expert opinion). Mayo Clinic, Rochester, Minn. May 26, 2010.
AN00357 July 22, 2010

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