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

Authors

  • Ana Portela
    • Chronobiology LaboratoriesUniversity of Minnesota
    • Physiology DepartmentFaculty of Veterinary Medicine, Complutense University of Madrid
  • Gordon Northrup
    • Chronobiology LaboratoriesUniversity of Minnesota
  • Franz Halberg
    • Chronobiology LaboratoriesUniversity of Minnesota
  • Germaine Cornélissen
    • Chronobiology LaboratoriesUniversity of Minnesota
  • Hans Wendt
    • Chronobiology LaboratoriesUniversity of Minnesota
  • James C. Melby
    • The University HospitalBoston University Medical Center
  • Erhard Haus
    • St. Paul-Ramsey Medical Center
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

Amplitude Blood pressure Circadian Circannual Cosinor

Copyright information

© Springer-Verlag 1996