The effects of night shift schedules on circadian time structure of blood pressure were studied in seven healthy young subjects by continuous monitoring of blood pressure every 30 min for 72 h. In the control experiment, subjects were instructed to sleep at regular times with the light off at 00.00 h and the light on at 07.00 h. In the shift experiment, they were instructed to go to bed at 06.00 h and wake up at 11.00 h. The circadian rhythm of blood pressure rapidly phase delayed by 3.5 h in the second night shift day as a group phenomenon.
Individual differences in changes in power spectral patterns of blood pressure were found in the night shift schedule.
Ultradian rhythmicity of blood pressure was more pronounced in three subjects, whereas the circadian rhythmicity was maintained in four subjects.
These findings held when the adaptation to shift work was taken into account.
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Simulation, Travail nocturne, Travail posté, Homme, Rythme circadien, Surveillance, Pression sanguine, Individu sain
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Simulation, Night work, Shift work, Human, Circadian rhythm, Surveillance, Blood pressure, Healthy subject
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0100836
Code Inist : 002A16F. Création : 16/11/1999.