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Related Experiment Videos

Reduced heart rate variability after right-sided stroke

H K Naver1, C Blomstrand, B G Wallin

  • 1Department of Neurology, Sahlgrenska University Hospital, Göteborg, Sweden.

Stroke
|February 1, 1996
PubMed
Summary
This summary is machine-generated.

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Right-sided strokes may increase sudden death risk by impairing cardiac autonomic control. This study found reduced heart rate variability in right-sided stroke patients, indicating parasympathetic dysfunction and potential arrhythmia risk.

Area of Science:

  • Neuroscience
  • Cardiology
  • Autonomic Function

Background:

  • Cerebral lesions can cause asymmetries in skin autonomic functions.
  • Previous studies noted differences in sudomotor and vasomotor function based on lesion side.

Purpose of the Study:

  • To investigate if bedside tests of cardiovascular autonomic function show side-specific differences after unilateral cerebral lesions.
  • To compare sympathetic and parasympathetic cardiovascular responses in stroke patients versus controls.

Main Methods:

  • Measured heart rate variability during deep breathing.
  • Assessed blood pressure and heart rate changes during tilt and isometric handgrip tests.
  • Compared data from right-sided stroke, left-sided stroke, transient ischemic attack, and healthy control groups.

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Main Results:

  • Right-sided stroke patients exhibited reduced respiratory heart rate variability, indicating impaired parasympathetic control.
  • Peripheral sympathetic nervous system function, assessed via handgrip and tilt tests, showed no significant differences between right- and left-sided stroke groups.
  • Left-sided stroke and control groups had similar heart rate variability.

Conclusions:

  • Lateralization of brain infarcts after stroke may impact cardiac autonomic innervation.
  • Reduced heart rate variability, linked to parasympathetic dysfunction, suggests a potential increased risk for cardiac arrhythmias and sudden death in right-sided stroke patients.
  • Findings highlight the importance of stroke location and lateralization in assessing cardiovascular risk.