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Related Experiment Videos

Pediatric impedance cardiography: temporal stability and intertask consistency.

J J McGrath1, W H O'Brien

  • 1Department of Psychology, Bowling Green State University, Ohio 43403, USA. jjmcgra@hotmail.com

Psychophysiology
|May 16, 2001
PubMed
Summary

Pediatric cardiovascular reactivity to stress is reliably measured using impedance cardiography. This method offers consistent and stable assessments for children, unlike blood pressure measures.

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Area of Science:

  • Pediatric cardiology
  • Cardiovascular physiology
  • Biomedical engineering

Background:

  • Cardiovascular disease (CVD) has origins in childhood.
  • While heart rate and blood pressure (BP) reliability in children is known, impedance cardiography (ICG) reliability is unevaluated.
  • Assessing pediatric cardiovascular reactivity is crucial for early CVD detection.

Purpose of the Study:

  • To evaluate the reliability and consistency of impedance cardiography measures in children.
  • To compare the reliability of ICG measures with traditional BP measures.
  • To determine if ICG can be a dependable tool for assessing children's cardiovascular responses to stress.

Main Methods:

  • Thirty-three children (ages 8-11) participated in two testing sessions.

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  • Cardiovascular measures included impedance cardiography and blood pressure.
  • Laboratory stressors comprised serial subtraction, isometric handgrip, and mirror-image tracing tasks.

    • Main Results:

    • ICG measures demonstrated moderately high temporal stability (average scores r(avg) = .74) and intertask consistency (average scores r(avg) = .78).
    • Blood pressure measures showed the lowest reliability.
    • Specific ICG indices like Heather index, preejection period, and stroke volume exhibited the highest reliability.

    Conclusions:

    • Impedance cardiography provides reliable and consistent assessment of cardiovascular reactivity in children.
    • ICG is a more reliable method than BP for assessing pediatric cardiovascular responses to laboratory stressors.
    • These findings support the use of ICG for robust pediatric cardiovascular research and clinical assessment.