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[Pressure variability in the cold-pressure response test]

A Girard1, F Weise, D Laude

  • 1Pharmacologie clinique, Association Claude-Bernard, CNRS URA 1482, hôpital Necker-Enfants Malades, Paris.

Archives Des Maladies Du Coeur Et Des Vaisseaux
|August 1, 1993
PubMed
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Immersion in ice water significantly increased blood pressure and heart rate variability, particularly Mayer waves. Respiratory-related heart rate and blood pressure fluctuations remained unchanged during the cold pressor test.

Area of Science:

  • Physiology
  • Cardiovascular Research
  • Autonomic Nervous System

Context:

  • The cold pressor test (CPT) is a physiological stressor used to evaluate autonomic nervous system responses.
  • Understanding short-term blood pressure (BP) and heart rate (HR) variability is crucial for assessing cardiovascular health.
  • Non-invasive methods like Finapres allow for continuous monitoring of BP and HR.

Purpose:

  • To investigate the impact of acute cold exposure (hand immersion in ice water) on short-term BP and HR variability.
  • To analyze spectral components of BP and HR variability, specifically Mayer waves and respiratory oscillations, during the CPT.

Summary:

  • Ten healthy subjects underwent a 5-minute hand immersion in ice water.
  • BP and HR were continuously monitored using Finapres, with data analyzed via spectral analysis.

Related Experiment Videos

  • The CPT resulted in elevated BP (systolic +28 mmHg, diastolic +13 mmHg) and increased overall BP and HR variability, predominantly in the Mayer wave frequency band (70-140 mHz).

    • Impact:

    • The findings suggest that cold-induced sympathetic vasoconstriction significantly influences Mayer wave oscillations in BP and HR.
    • The study highlights the specific frequency bands affected by cold stress, providing insights into autonomic regulation mechanisms.
    • This research contributes to understanding the physiological responses to cold stimuli and their implications for cardiovascular variability.