Key result
Circaseptan cycles show no significant weekly blood pressure trends in long-term single-patient monitoring.
Why the study?
Previous studies on blood pressure variability across the week have contradictory results and lack prolonged individual measurement data.
Does long-term systematic blood pressure measurement reveal a significant weekly (circaseptan) variability pattern in a single retired male hypertension patient?
Case Report (n=1)
No
Does long-term systematic blood pressure measurement reveal a significant weekly (circaseptan) variability pattern in a single retired male hypertension patient?
Intensive, year-long monitoring of a single hypertensive patient demonstrated high day-to-day blood pressure variability but failed to find a consistent or statistically significant weekly pattern.
Answers are grounded in this paper and cite their sources.
No significant weekly BP cycle in this single case warrants caution against assuming circaseptan patterns clinically; leaves open their existence in broader populations.
Studies about blood-pressure measurements give contradictory results concerning variability across the week. Some studies indicate a Monday surge, other studies suggest relatively low values on the weekend, and still other studies do not find any significant differences across the week. The data analyzed thus far concern individuals, occasionally populations, that were measured either once or up to two weeks. This implies that the available data do not provide reliable information about the weekly variability of an individual if measured for a prolonged time. The present study fills this gap in knowledge by presenting an analysis of systematic measurements of an individual over a full year. The huge set of data (2196 SBP and 2196 DBP measurements) indicates a great variability across the week, without statistically significant tendencies.
No takes yet. Share an insight, caveat, or question.
Loon et al. (2026) conducted a case report in Hypertension (n=1). Circaseptan cycle (day of the week) was evaluated on Blood pressure variability across the week (SBP and DBP). The circaseptan cycle showed great variability in blood pressure over a full year (2196 SBP and DBP measurements) in a single hypertensive male, without statistically significant tendencies.
Synapse has enriched 10 related papers. Consider them for comparative context: