International Journal of Biometeorology

, Volume 39, Issue 4, pp 176–181

Changes in human blood pressure with season, age and solar cycles: A 26-year record

  • Ana Portela
  • Gordon Northrup
  • Franz Halberg
  • Germaine Cornélissen
  • Hans Wendt
  • James C. Melby
  • Erhard Haus
Original Article

DOI: 10.1007/BF01221388

Cite this article as:
Portela, A., Northrup, G., Halberg, F. et al. Int J Biometeorol (1996) 39: 176. doi:10.1007/BF01221388

Abstract

The record was studied of a 71-year-old, diurnally active (0700–2200 hours) male psychiatrist (G.N.) who self-measured systolic and diastolic blood pressure (BPS and BPD) mostly but not exclusively on Sunday mornings, from 1969 to 1994. A large about-yearly change was revealed which increased with age and was accompanied by a decreasing trend in the yearly rhythm-adjusted mean (MESOR;P<0.01). According to conventional criteria that specify only upper limits of acceptability, G.N. was hypertensive in summer and normotensive in other seasons. Since changes in both MESOR and circannual amplitude occurred, a systematic surveillance of BP is the chronobiological recommendation.

Key words

AmplitudeBlood pressureCircadianCircannualCosinor

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Ana Portela
    • 1
    • 2
  • Gordon Northrup
    • 1
  • Franz Halberg
    • 1
  • Germaine Cornélissen
    • 1
  • Hans Wendt
    • 1
  • James C. Melby
    • 3
  • Erhard Haus
    • 4
  1. 1.Chronobiology LaboratoriesUniversity of MinnesotaMinneapolisUSA
  2. 2.Physiology DepartmentFaculty of Veterinary Medicine, Complutense University of MadridSpain
  3. 3.The University HospitalBoston University Medical CenterBostonUSA
  4. 4.St. Paul-Ramsey Medical CenterSt. PaulUSA