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Different impact factors for accurate oscillometric blood pressure measurement between sinus rhythm and atrial

Feng Xie1,2, Jinsong Xu1, Huan Liu1

  • 1Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China.

Journal of Human Hypertension
|March 3, 2021
PubMed

Insights

Oscillometric blood pressure (BP) devices are less accurate in patients with atrial fibrillation (AF) compared to those in sinus rhythm (SR). Ventricular rate significantly impacts BP measurement accuracy in AF patients.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Accurate blood pressure (BP) monitoring is crucial in cardiovascular care.
  • Oscillometric BP measurement is widely used but its accuracy can be affected by arrhythmias.
  • Atrial fibrillation (AF) and sinus rhythm (SR) represent different cardiac electrical activities that may influence BP readings.

Purpose of the Study:

  • To compare the accuracy of upper arm oscillometric BP measurements against intra-aortic BP measurements in patients with AF and SR.
  • To investigate the influence of patient-specific factors like age and ventricular rate (VR) on oscillometric BP accuracy in both groups.

Main Methods:

  • Simultaneous measurements of upper arm oscillometric BP and intra-aortic BP were taken three times in 124 AF patients and 98 SR patients undergoing coronary arteriography.
  • The difference (delta BP) and percentage difference (PD-BP) between the two measurement methods were calculated.
  • Correlation analyses were performed to assess the impact of age and VR on BP measurement accuracy.

Main Results:

  • Oscillometric BP underestimated intra-aortic BP by 2.2/1.6 mmHg (SBP/DBP) in SR patients, but significantly more by 5.8/4.8 mmHg in AF patients.
  • In SR patients, age showed correlations with delta SBP and delta DBP.
  • In AF patients, ventricular rate (VR) was negatively correlated with delta SBP and delta DBP, indicating decreased accuracy with increased VR.

Conclusions:

  • Oscillometric BP measurement accuracy is significantly lower in patients with AF compared to SR.
  • Ventricular rate is a key factor affecting oscillometric BP accuracy in AF patients.
  • Age may influence oscillometric BP accuracy in SR patients, while VR is a critical determinant in AF patients.

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