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The influence of day and night work on the circadian variations of cardiovascular performance

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Summary

Circadian variations of the pre-ejection period, Q-T interval, heart rate and oral temperature at rest and in day and night shift work were investigated. At rest, pronounced circadian variation was found in heart rate, pre-ejection period and Q-T interval. The ratio between Q-T interval and heart rate also shows a distinct circadian variation. When working, the rest rhythms of the variables were obscured. The physiological implications for shift work are discussed.

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Supported by the National Swedish Board for Technical Development, Grants No. 76-7096 I and 78-4307

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Vrâncianu, R., Filcescu, V., Ionescu, V. et al. The influence of day and night work on the circadian variations of cardiovascular performance. Europ. J. Appl. Physiol. 48, 11–23 (1982). https://doi.org/10.1007/BF00421160

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