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How many blood pressure measurements should we take in the office?
Gülsüm Özkan1, Şükrü Ulusoy2, Rahmi Yılmaz3
1Department of Nephrology, School of Medicine, Tekirdağ Namık Kemal University, Tekirdağ, Türkiye.
Insights
For accurate hypertension diagnosis, taking three office blood pressure (BP) measurements is recommended. Averaging the second and third BP readings is best for systolic measurements, while multiple readings excluding the first are suggested for diastolic measurements.
Area of Science:
- Cardiology
- Hypertension Management
- Clinical Measurement
Background:
- Lack of consensus exists on the optimal number of office blood pressure (BP) measurements for hypertension diagnosis.
- Current guidelines vary, leading to potential inconsistencies in patient assessment.
Purpose of the Study:
- To evaluate the compatibility of different multiple average office BP measurements with 24-hour ambulatory BP monitoring (ABPM).
- To provide evidence-based recommendations for office BP measurement protocols in hypertension diagnosis.
Main Methods:
- Posthoc analysis of the Cappadocia hypertension cohort data.
- Examination of 1158 office BP measurements from 207 patients.
- Comparison of five different averaging methods (G1-G5) against 24-hour ABPM data.
Main Results:
- Systolic BP (SBP) showed a significant difference only with the average of the first and second measurements (G1) compared to daytime ABPM.
- Diastolic BP (DBP) in all office measurement groups remained higher than daytime ABPM DBP.
- Office DBP values more closely approximated daytime ABPM DBP as the number of measurements increased.
Conclusions:
- Recommends performing three office BP measurements for hypertension diagnosis.
- Suggests averaging the second and third office BP measurements for SBP.
- Advocates for averaging multiple office DBP measurements, excluding the first, to better align with ABPM.
- Highlights the importance of standardized BP measurement techniques for accurate hypertension diagnosis.
Abstract:
No consensus has emerged among different guidelines concerning how many blood pressure (BP) measurements should be performed at office visits in the diagnosis of hypertension. The purpose of this study was to examine the compatibility of various multiple average office BP measurements and 24-h BP monitoring (ABPM) in patients followed up in the posthoc analysis of the Cappadocia hypertension cohort. A total 1158 office BP measurements by 207 patients were examined. The results were then classified as G1 (average of the 1st and 2nd BP), G2 (average of the 2nd and 3rd), G3 (average of the 2nd, 3rd, and 4th), G4 (average of the 2nd, 3rd, 4th, and 5th), and G5 (average of all five measurements). Compatibility between the average values in the groups and concomitant 24-h ABPM data was examined. While a significant difference was observed between daytime 24-h ABPM SBP and G1 (p = .002), no difference was found in the other groups. Office DBP approached the daytime 24-h ABPM values as the number of measurements in the five groups increased, although average office DBP data in all groups were higher than daytime 24-h ABPM DBP (p = .000 for all). In light of our study results, we recommend that three office BP measurements be performed and that the average of the 2nd and 3rd measurements be used for SBP, while in terms of DBP, we recommend that as many measurements as possible be taken without the 1st value being included in the average.
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Prepare for the Procedure:
01:28Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
01:21Sites for measruring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
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01:17Measurement of Blood Pressure