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Presence of a pet dog and human cardiovascular responses to mild mental stress


The mechanisms underlying the possible cardiovascular benefits of pet ownership have not been established. Using a randomized design, the effect of a friendly dog on cardiovascular and autonomic responses to acute, mild mental stress was investigated. Seventy-two subjects (aged 40±14 y; mean±SD) participated. Rest was alternated with mental stress during four 10-minute periods. An unknown dog was randomly selected to be present during the first or the second half of the study. Blood pressure (BP) and heart rate (HR) were monitored continuously and cardiac autonomic function assessed using spectral analysis of heart period. Heart period variability data were expressed as the ratio of 0.1 Hz to respiratory or high frequency variation (LF/HF). Whereas mental stress significantly increased BP and HR in the absence of the dog (from 125/71 ±3/2 to 133/75±3/2 mm Hg; p<0.001), the presence of the dog had no effect on these variables. Heart period LF/HF ratio was lowest in dog owners in the presence of the dog (dog present 2.8±0.3 versus dog absent 3.4±0.4; p<0.001) and in non-dog owners in the absence of the dog (dog present 3.4±0.4 versus dog absent 2.8±0.3; p<0.001). In conclusion, a friendly but unfamiliar dog does not influence BP or HR either at rest or during mild mental stress. Cardiac autonomic profile was most favorable in the presence of the dog for dog owners and in the absence of the dog for non-owners.

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  1. 1.

    Friedmann E, Thomas S. Pet ownership, social support, and one-year survival after acute myocardial infarction in the cardiac arrhythmia suppression trial (CAST).Am J Cardiol 1995; 76:1213–1217.

    Article  CAS  PubMed  Google Scholar 

  2. 2.

    Anderson W, Reid C, Jennings G. Pet ownership and risk factors for cardiovascular disease.Med J Aust 1992; 157:298–301.

    CAS  PubMed  Google Scholar 

  3. 3.

    Siegel J. Stressful life events and use of physician services among the elderly: The moderating role of pet ownership.J Person Social Psychol 1990; 58:1081–1086.

    CAS  Google Scholar 

  4. 4.

    Friedmann E, Lockwood S. Health benefits of pets for families.Marriage and Family Rev 1985; 8:191–203.

    Google Scholar 

  5. 5.

    Katcher A, Friedmann E. Potential health value of pet ownership.Compendium on continuing education for the practicing veterinarian 1980; 2:117–121.

    Google Scholar 

  6. 6.

    Wilson CC. The pet as an anxiolytic intervention.J Nerv Ment Dis 1991; 179:482–489.

    CAS  PubMed  Google Scholar 

  7. 7.

    Wilson CC. Physiological responses of college students to a pet.J Nerv Ment Dis 1987; 175:606–612.

    CAS  PubMed  Google Scholar 

  8. 8.

    Dembicki D, Anderson J. Pet ownership may be a factor in improved health of the elderly.J Nutr Elder 1996; 15:15–31.

    CAS  PubMed  Google Scholar 

  9. 9.

    Serpell J. Beneficial effects of pet ownership on some aspects of human health and behaviour.J R Soc Med 1991; 84:717–720.

    CAS  PubMed  Google Scholar 

  10. 10.

    Axelrod J, Mueller RA, Henry JP, et al. Changes in enzymes involved in the biosynthesis and metabolism of noradrenaline and adrenaline after psychosocial stimulation.Nature 1970; 225:1059–1060.

    Article  CAS  PubMed  Google Scholar 

  11. 11.

    Henry JP, Stephens PM. Psychosocial stress induces high blood pressure in a population of mammals on a low-salt diet.J Hypertens 1988; 6:139–144.

    CAS  PubMed  Google Scholar 

  12. 12.

    Henry JP. The induction of acute and chronic cardiovascular disease in animals by psychosocial stimulation.Int J Psychiatry Med 1975; 6:147–158.

    CAS  PubMed  Google Scholar 

  13. 13.

    Siltanen P. Stress, coronary disease, and coronary death.Ann Clin Res 1987; 19:96–103.

    CAS  PubMed  Google Scholar 

  14. 14.

    Zasloff R, Kidd A. Loneliness and pet ownership among single women.Psychol Rep 1994; 75:747–752.

    CAS  PubMed  Google Scholar 

  15. 15.

    Friedmann E, Katcher A, Thomas S, et al. Social interaction and blood pressure. Influence of animal companions.J Nerv Ment Dis 1983; 171:461–465.

    CAS  PubMed  Google Scholar 

  16. 16.

    Grossberg J, Alf E, Vormbrock J. Does pet dog presence reduce human cardiovascular responses to stress?Anthrozoos 1988; 2:38–44.

    Google Scholar 

  17. 17.

    Kingwell B, Thompson J, Kaye D, et al. Heart rate spectral analysis, cardiac norepinephrine spillover and muscle sympathetic nerve activity during human sympathetic nervous activation and failure.Circulation 1994; 90:234–240.

    CAS  PubMed  Google Scholar 

  18. 18.

    Task force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Heart rate variability. Standards of measurement, physiological interpretation, and clinical use.Circulation 1996; 93:1043–1065.

    Google Scholar 

  19. 19.

    Pagani M, Lombardi F, Guzetti S, et al. Power spectral analysis of heart rate and arterial pressure variablities as a marker of sympatho-vagal interaction in man and conscious dog.Circ Res 1986; 59:178–193.

    CAS  PubMed  Google Scholar 

  20. 20.

    Stroop J. Studies of interferences in serial verbal reactions.J Exp Psychol 1935; 18:643–662.

    Google Scholar 

  21. 21.

    Booth ML, Owen N, Bauman A, et al. Relationship between a 14-day recall measure of leisure-time physical activity and a submaximal test of physical work capacity in a population sample of Australian adults.Res Q Exerc Sport 1996; 67:221–227.

    CAS  PubMed  Google Scholar 

  22. 22.

    Bench CJ, Frith CD, Grasby PM, et al. Investigations of the functional anatomy of attention using the Stroop test.Neuropsychologia 1993; 31:907–922.

    Article  CAS  PubMed  Google Scholar 

  23. 23.

    Lindqvist M, Kahan T, Melcher A et al. Cardiovascular and sympatho-adrenal responses to mental stress in primary hypertension.Clin Sci (Colch) 1993; 85:401–409.

    CAS  Google Scholar 

  24. 24.

    Kingwell BA, Thompson JM, Kaye DM, et al. Heart rate spectral analysis, cardiac norepinephrine spillover, and muscle sympathetic nerve activity during human sympathetic nervous activation and failure.Circulation 1994; 90:234–240.

    CAS  PubMed  Google Scholar 

  25. 25.

    Grossberg J, Alf E. Interaction with pet dogs: Effects on human cardiovascular response.J Delta Soc 1985; Winter: 20–27.

    Google Scholar 

  26. 26.

    Allen K, Blascovich J, Tomaka J, et al. Presence of human friends and pet dogs as moderators of autonomic responses to stress in women.J Person Soc Psychol 1991; 61:582–589.

    CAS  Google Scholar 

  27. 27.

    Friedmann E. The value of pets for health and recovery.Waltham Symposium 1990:8–17.

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Corresponding author

Correspondence to Bronwyn A. Kingwell Ph.D..

Additional information

This work was supported by Petcare Information and Advisory Service, Victoria, Australia.

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Kingwell, B.A., Lomdahl, A. & Anderson, W.P. Presence of a pet dog and human cardiovascular responses to mild mental stress. Clinical Autonomic Research 11, 313–317 (2001).

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Key words

  • blood pressure
  • heart rate
  • blood pressure variability
  • heart rate variability
  • autonomic function