Wrist BP measurements go wide of brachial values

  • Armstrong MK & al.
  • Hypertension
  • 1 May 2019

  • International Clinical Digest
Access to the full content of this site is available only to registered healthcare professionals. Access to the full content of this site is available only to registered healthcare professionals.

Takeaway

  • Intra-arterial systolic BP measurements taken at the wrist can run much higher than brachial values, by 15 mmHg in 14% of cases.
  • These authors say that radial measures are not a good representation of brachial values.

Why this matters

  • Wearables that measure BP at the wrist are a growing market, raising concerns about these differences.
  • Some have eyed purported differences skeptically, calling it a “fictional Popeye phenomenon,” which these authors say their findings demonstrate actually exists.

Key results

  • Average increase in systolic BP with wrist vs brachial measurement was 5.5 mmHg.
  • 57% had wrist values that were not within 5 mmHg of brachial measures.
  • Of these, 14% had wrist values >15 mmHg higher (mean radial, 163.9±22.0 vs mean brachial, 142.4±20.5 mmHg; P<.001>
  • 11% had wrist values >5 mmHg lower than brachial (mean radial, 133.3±26.6 vs mean brachial, 143.9±26.5; P<.001>

Study design

  • Intra-arterial BP measures taken in 180 people having coronary angiography (mean age, 61 years; 69% men).
  • Funding: Grant support for authors.

Limitations

  • Mostly older, overweight men with self-reported cardiovascular disease. 

Please confirm your acceptance

To gain full access to GPnotebook please confirm:

By submitting here you confirm that you have accepted Terms of Use and Privacy Policy of GPnotebook.

Submit