Effect of feedback signal and psychological characteristics on blood pressure self-manipulation capability

Author(s): Henderson, R. J., Carter, N., Bath, A., Hart, M. G., Langeluddecke, P., Hunyor, S. N.

Journal/Book: Psychophysiology. 1998; 35: 40 West 20TH Street, New York, NY 10011-4211. Cambridge Univ Press. 405-412.

Abstract: Blood pressure presentation mode and personality are likely to influence biofeedback outcome. Thirty-six normotensive subjects were randomly assigned to visual or auditory continuous systolic feedback. ''Distracting speech'' and ''broad band noise'' were also superimposed and the effect on the biofeedback response was investigated. Psychological influence was also investigated. Systolic pressure reductions of 4 +/- 4.3 mmHg (visual, p = .04) and 5 +/- 5.5 mmHg (visual + auditory, p = .03) were achieved compared with auditory feedback (2 +/- 4.7 mmHg), which was less effective. The addition of noise or speech had no effect on the systolic response, but speech adversely affected diastolic reduction (p = .04). Mood (p = .003) was associated with systolic lowering, whereas increased trait anxiety (p = .06) and expectation (p = .03) had trends for opposite effects. Increased anger-hostility, state-anxiety, and expectation (p = .06) had links with systolic raising capability. We conclude that feedback modality and psychological characteristics have implications for studies investigating blood pressure manipulation capability.

Note: Article Hunyor SN, Royal N Shore Hosp, CRC Cardiac Technol, Block 4, 3RD Floor, St Leonards, NSW 2065, AUSTRALIA

Keyword(s): blood pressure; visual and auditory signal; noise; biofeedback; attention; psychological factors; BIOFEEDBACK-ASSISTED RELAXATION; THERMAL BIOFEEDBACK; ESSENTIAL-HYPERTENSION; NOISE; ATTENTION; PERFORMANCE; SYSTEM

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