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Updated: Apr 25, 2026

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
[Vascular variability syndromes]
Insights
Chronobiological analysis of blood pressure identifies vascular variability disorders (VVDs). These VVDs help assess risks for cardio-, cerebro-, and renovascular diseases.
Area of Science:
- Chronobiology
- Cardiovascular Physiology
- Hypertension Research
Context:
- Ambulatory blood pressure monitoring (ABPM) provides around-the-clock data.
- Chronobiological interpretation requires time-specific reference values from matched healthy individuals.
- Vascular variability disorders (VVDs) represent deviations from normal BP patterns.
Purpose:
- To apply analytical methods to ABPM data for VVD identification.
- To interpret BP variability in a chronobiological context.
- To assess cardio-, cerebro-, and renovascular disease risk using identified VVDs.
Summary:
- Analytical methods applied to ABPM data identify VVDs.
- VVDs include circadian BP over-swinging (CHAT), deficient heart rate variability, MESOR hypertension, elevated pulse pressure, and BP ecphasia.
- These VVDs can combine into multi-component vascular variability syndromes.
Impact:
- Enables early identification of individuals at risk for major vascular diseases.
- Provides a framework for understanding complex BP regulation.
- Facilitates personalized risk assessment and potential therapeutic strategies.
Abstract:
Analytical global and local methods applied to human blood pressure (BP) records of around-the-clock measurements. The chronobiological interpretation of ambulatory BP monitoring records in the light of time-specified reference values derived from healthy peers matched by sex and age identify vascular variability disorders (VVDs) for an assessment of cardio-, cerebro-, and renovascular disease risk. VVD includes circadian BP over-swinging (CHAT, short for circadian hyper-amplitude tension), deficient heart rate variability, MESOR (midline-estimating statistic of rhythm) hypertension, excessively elevated pulse pressure over 60 mmHg, BP ecphasia (an odd timing of the circadian rhythms in BP but not in that of heart rate) and frequency alteration. The term MESOR-hypertension indicates only one of several VVDs that can combine to for sets of 2, 3 and n-component vascular variability syndromes.
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