• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Effect of shift work on blood pressure in middle aged workers

Research Project

Project/Area Number 02670231
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Hygiene
Research InstitutionAichi Medical University

Principal Investigator

WATANABE Takemasa  Aichi Medical University, Hygiene, Lecturer, 医学部, 講師 (50182928)

Project Period (FY) 1990 – 1992
KeywordsShift work / Circadian rhythm / Blood pressure / Middle aged worker / Reactivity / 反応性
Research Abstract

We monitored blood pressure (BP) and heart rate (HR) every 15 minutes over 24 hours by a noninvasive ambulatory method in normotensive and hypertensive shift workers, once while on the day shift and once while on the night shift. The circadian variations in BP and HR were almost completely reversed with the switch from the day shift to the night shift in normotensive workers. In hypertensive workers, however, the circadian pattern was not completely reversed, i.e. BP and HR while on the night shift dropped to the lowest level of the day between 0000 and 0400. Thus, we found differences between normotensive and hypertensive workers in the effects of shift work and time of day on BP and HR.
In a laboratory condition, we compared reactivity of blood pressure to three stress loading tests (mental arithmetic, cold face test, and head-up tilt) which were measured three times a day at 0900, 2100 and 0300. Blood pressure significantly declined during head-up tilt at 0300 in the hypertensive subjects, while their cardiac output showed no change during the test. We speculated that some mechanisms such as increasing the peripheral vascular resistance might be impaired in the hypertensive subjects during midnight, which is also related to the drop of blood pressure level between 0000 and 0400 in the hypertensive shift workers.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Kobayashi,F.,Watanabe,T.,Tanaka,T.,Nakagawa T.: "Effect of shift work and time of day on blood pressure and heart rate in normotensive and hypertensive workers." J.Occup.Med.Singapore.4. 58-63 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kobayashi,F.,Furui,H.,Watanabe,T.,Watanabe,M.,Akamatsu,Y.,Tanaka,T.,Horibe,H.,et al.: "The relationship between the ambulatory and the laboratory reactivity of blood pressure and heart rate." Jp.J.Hygiene.48. 879-885 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kobayashi,F.,Watanabe,M.,Watanabe,T.,Furui,H.,Ueya,E.,Sumi,K.,Akamatsu,Y.,Horibe,H.: "Cardiovascular reactivity in normotensive and hypertensive middle aged men." 発表予定.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kobayashi, F., Watanabe, T., Tanaka, T.and Nakagawa T.: "Effect of shift work and time of day on blood pressure and heart rate in normotensive and hypertensive workers." J.Occup.Med.Singapore.4. 58-63 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kobayashi, F., Furui, H., Watanabe, T., Watanabe, M., Akamatsu, Y., Tanaka, T., Horibe, H., Sumi K., Nakagawa T.and Takeshima N.: "The relationship between the ambulatory and the laboratory reactivity of blood pressure and heart rate." Jp. J.Hygiene.48. 879-885 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kobayashi, F., Watanabe, M., Watanabe, T., Furui, H., Ueya, E., Sumi, K., Akamatsu, Y., and Horibe, H.: "Cardiovascular reactivity in normotensive and hypertensive middle aged men." (should be submitted).

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1995-03-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi