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The vascular "cold patch" is not a prognostic index for headache.

B Swerdlow, J N Dieter

    Headache
    |October 1, 1989
    PubMed
    Summary

    The vascular cold patch, a thermal marker on the forehead, did not significantly change in size with migraine treatment, even when headache frequency improved or worsened. This challenges its use as a prognostic index for vascular headaches.

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    Area of Science:

    • Neurology
    • Medical Thermography
    • Vascular Physiology

    Background:

    • The vascular cold patch in the external carotid region was previously identified as a diagnostic marker.
    • It was hypothesized that the cold patch size correlates with vascular headache severity and treatment efficacy.

    Purpose of the Study:

    • To replicate previous findings on the prognostic value of the vascular cold patch in migraine patients.
    • To assess if changes in cold patch size correlate with improvements or worsening of migraine conditions.

    Main Methods:

    • Thermographic re-examination of the external carotid region in 40 migraine patients before and after treatment.
    • Comparison of thermograms to evaluate changes in cold patch size.
    • Correlation of thermographic findings with headache frequency changes.

    Main Results:

    • Migraine patients showed varied cold patch changes regardless of condition improvement or worsening.
    • A significant portion of patients with improved headache conditions (73.2% reduction) still exhibited stable or increased cold patch size.
    • No significant difference in cold patch changes was found between improved and worsened headache groups (p < .70).

    Conclusions:

    • The vascular cold patch size does not appear to be a reliable prognostic index for migraine treatment outcomes.
    • Further research is needed to understand the role of the cold patch in vascular headache physiology.

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