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Related Experiment Videos

Cardiovascular autonomic dysfunction correlates with brain MRI lesion load in MS.

A Saari1, U Tolonen, E Pääkkö

  • 1Department of Neurology, Oulu University Hospital, P.O. Box 25, 90029 OYS, Oulu, Finland. anne.saari@ppshp.fi

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|May 12, 2004
PubMed
Summary

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Multiple sclerosis (MS) patients exhibit impaired cardiovascular autonomic control, with reduced heart rate and blood pressure responses. Midbrain lesions in MS correlate significantly with this cardiovascular dysfunction.

Area of Science:

  • Neurology
  • Cardiology
  • Medical Imaging

Background:

  • Multiple sclerosis (MS) is a demyelinating disease affecting the central nervous system.
  • Cardiovascular autonomic dysfunction is a recognized but not fully understood complication of MS.

Purpose of the Study:

  • To investigate cardiovascular autonomic control in patients with clinically definite multiple sclerosis (MS).
  • To correlate cardiovascular autonomic function with brain magnetic resonance imaging (MRI) lesion load in MS patients.

Main Methods:

  • A standardized battery of cardiovascular tests was administered to 51 MS patients and 50 healthy controls.
  • Brain MRI was performed on all MS patients to assess lesion volume and location.

Main Results:

Related Experiment Videos

  • MS patients showed significantly decreased heart rate (HR) responses during deep breathing and tilt table testing compared to controls.
  • Blood pressure (BP) responses during tilt table testing were also impaired in MS patients.
  • A significant association was found between the volume of midbrain MRI lesions and impaired BP responses.

Conclusions:

  • Multiple sclerosis leads to reduced HR variation and diminished BP reactions, indicating disturbed cardiovascular regulation.
  • Midbrain lesions in MS are specifically linked to cardiovascular dysfunction, highlighting a potential target for understanding and managing autonomic complications.