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Related Experiment Videos

Cardiac dysrhythmias associated with central nervous system dysfunction

C Keller1, A Williams

  • 1College of Nursing, Arizona State University, Tempe 85287-2602.

The Journal of Neuroscience Nursing : Journal of the American Association of Neuroscience Nurses
|December 1, 1993
PubMed
Summary

Intracranial pathology can cause lethal cardiac dysrhythmias due to autonomic dysfunction. Specific brain regions and nerves influence heart rate and rhythm, affecting outcomes.

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Area of Science:

  • Neurology
  • Cardiology
  • Autonomic Neuroscience

Background:

  • Intracranial pathology frequently leads to cardiac dysrhythmias, including potentially fatal arrhythmias.
  • Conditions like stroke, hemorrhage, seizures, and head trauma are linked to myocardial damage and ECG abnormalities.
  • Autonomic nervous system dysfunction is implicated in these cardiac disturbances.

Purpose of the Study:

  • To explore the association between intracranial pathology and cardiac dysrhythmias.
  • To investigate the role of the autonomic nervous system in mediating these cardiac events.
  • To examine potential lateralized functions within the brain influencing cardiac rhythm.

Main Methods:

  • Review of existing literature linking neurological conditions with cardiac dysrhythmias.

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  • Analysis of autonomic nervous system pathways involved in neural input to the heart.
  • Examination of experimental and human data on brain stimulation and cardiac responses.

    • Main Results:

    • Observed cardiac dysrhythmias include T-wave changes, altered intervals (P-R, Q-T), and various ectopic beats and tachycardias/bradycardias.
    • Autonomic derangements are identified as the cause of these rate, rhythm, and conduction disturbances.
    • Evidence suggests lateralized brain function: right insular cortex stimulation is linked to tachycardia, while left insular cortex stimulation is associated with bradycardia.

    Conclusions:

    • Intracranial pathology significantly impacts cardiac function through autonomic pathways.
    • Specific brain regions and vagal nerve stimulation exhibit lateralized effects on cardiac rhythm.
    • Further research is needed to fully elucidate the specific neuropathological correlates of observed dysrhythmias.