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An Alternative to the Traditional Cold Pressor Test: The Cold Pressor Arm Wrap
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Cold pressor response in high landers versus low landers.

Jagdish Narayan1, Archana Ghildiyal2, Manish Goyal3

  • 1Assistant Professor, Department of Physiology, King George's Medical University , Lucknow, Uttar Pradesh, India .

Journal of Clinical and Diagnostic Research : JCDR
|December 6, 2014
PubMed
Summary

Highlanders exhibit a reduced blood pressure response to the cold pressor test, indicating a protective autonomic adaptation to their environment. This hypo-reactive response suggests better management of sympathetic and parasympathetic activity at high altitudes.

Keywords:
AltitudeAutonomicCPTHypertensionParasympatheticSympathetic

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Area of Science:

  • Physiology
  • Environmental Health
  • Cardiovascular Research

Background:

  • Highlanders face hypobaric hypoxia and low temperatures, increasing sympathetic activity and blood pressure.
  • Despite environmental stressors, highlanders typically have lower blood pressure than lowlanders.
  • The cold pressor test (CPT) is a predictor of future hypertension.

Purpose of the Study:

  • To compare vascular reactivity using the cold pressor test in highlanders and lowlanders.
  • To investigate the predictive value of CPT in high-altitude populations.
  • To understand autonomic adaptations to high-altitude environments.

Main Methods:

  • Compared vascular reactivity (blood pressure, heart rate) during CPT.
  • Included highlanders (n=45) and lowlanders (n=46).
  • Assessed systolic and diastolic blood pressure and heart rate changes.

Main Results:

  • Highlanders showed lower systolic and diastolic blood pressure and heart rate changes during CPT compared to lowlanders.
  • Females generally exhibited a greater cold pressor response than males in both groups.
  • CPT response was hypo-reactive in the highlander population.

Conclusions:

  • Hypo-reactive CPT in highlanders is linked to higher parasympathetic and lower sympathetic tone.
  • This decreased CPT response is an adaptive mechanism for managing autonomic stress in hypobaric and cold conditions.
  • Autonomic modulation allows highlanders to thrive in challenging environments without excessive stress.