Pressure Building Against the Clock: The Impact of Circadian Misalignment on Blood Pressure.
Level 5 - mechanism / opinion, no new human data
Narrative review of existing literature without systematic search methodology or new primary human data.
PubMed 37837518 · doi:10.1007/s11906-023-01274-0
What was done
This narrative review summarizes literature examining the effects of recurring circadian misalignment—specifically from shift work and social jetlag—on 24-hour blood pressure regulation, hypertension risk, physiological mechanisms, and potential mitigation strategies such as light therapy, melatonin supplementation, and timed drug administration.
What was found
The abstract reports no numerical values or effect sizes. It qualitatively describes that circadian misalignment from shift work disrupts 24-hour blood pressure rhythms via altered autonomic balance, variations in sodium retention, impaired endothelial vasodilation, and proinflammatory activation. Social jetlag was reported to have no direct effect on baseline blood pressure in healthy adults, though it may indirectly elevate hypertension risk via sympathetic activation or obesity.
Why it matters
This review highlights circadian misalignment as a potential driver of adverse blood pressure patterns in shift workers, underscoring the need for targeted circadian and chronotherapeutic interventions.
Limits
As a narrative review, this paper provides no primary data, sample sizes, or quantitative meta-analytic estimates, and lacks a systematic search protocol or risk-of-bias evaluation.