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The clinical utility of blood pressure load in hypertension
1Mayo Clinic, Jacksonville, Florida.
Insights
Ambulatory blood pressure load (BPL) offers crucial insights beyond mean values for hypertension management. Analyzing BPL is vital for assessing cardiovascular risk and guiding treatment effectively.
Area of Science:
- Cardiology
- Hypertension Research
- Clinical Measurement
Background:
- Blood pressure variability is significant in hypertension.
- Standard mean ambulatory blood pressure (MABP) may not fully capture risk.
- Ambulatory blood pressure load (BPL) is an emerging metric.
Purpose of the Study:
- To highlight the importance of blood pressure load (BPL) in hypertension analysis.
- To demonstrate the correlation between BPL and target-organ damage.
- To investigate the clinical utility of BPL in managing hypertension.
Main Methods:
- Analysis of ambulatory blood pressure (ABP) data, including BPL.
- Correlation of BPL with indices of target-organ changes like left ventricular mass index (LVMI).
- Assessment of treatment effects on BPL.
Main Results:
- Some hypertensive patients with normal diastolic MABP showed high diastolic BPL (near 50%).
- Strong correlations exist between BPL and LVMI.
- Lowering office blood pressure below 85 mm Hg reduced BPL to 15-20%.
Conclusions:
- BPL is a valuable metric for assessing hypertension and cardiovascular risk.
- Targeting lower office blood pressure may effectively reduce BPL.
- Further longitudinal studies are needed to confirm BPL's role in cardiovascular disease prediction.
Abstract:
The variability of blood pressure and its consequences suggests that ambulatory blood pressure (ABP) data should be analyzed not only by mean ambulatory blood pressure (MABP), but also by looking at blood pressure load (BPL, the percentage of measurements > 140/90 mm Hg while awake and > 120/80 while asleep). In one study, several hypertensive patients whose ambulatory diastolic blood pressure was < 90 mm Hg had a diastolic load near 50%. Studies have reported strong correlations between BPL and indices of target-organ changes such as left ventricular mass index (LVMI). It was necessary to lower office blood pressure to < 85 mm Hg to reduce BPL to a normal range of 15 to 20%. To further investigate the usefulness of BPL in the study of hypertension, more longitudinal studies of cardiovascular disease and blood pressure variability are needed.