title: Rapid reversal of circadian blood pressure rhythm in shift workers.
abstract: The blood pressure and heart rates of seven normotensive shift workers were monitored automatically for 24 h with a non-invasive ambulatory method on 3 different days. The first monitoring session took place at the end of an ordinary work period of morning shifts, the second on the first day of a period of night shifts, and the third on the last day of a period of night shifts. The circadian blood pressure rhythm, which showed a normal pattern during the daytime work shift, was totally reversed from the first day of the night shift. The blood pressure rhythm closely followed the sleep-wakefulness cycle. The changes in circadian heart rate rhythm were not as pronounced as those in blood pressure but showed a similar trend.
authors.affiliation: Research Centre, Orion Pharmaceutica, Espoo, Finland.
authors.forename: S
authors.initials: S
authors.lastname: Sundberg
authors.forename: A
authors.initials: A
authors.lastname: Kohvakka
authors.forename: A
authors.initials: A
authors.lastname: Gordin
mesh_terms: D000328:Adult; D001794:Blood Pressure; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008875:Middle Aged; D008991:Monitoring, Physiologic; D014937:Work; D014940:Work Schedule Tolerance