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Related Experiment Videos

Central nervous system function after cardiopulmonary bypass

J Zeitlhofer1, S Asenbaum, C Spiss

  • 1University of Clinic of Neurology, Vienna, Austria.

European Heart Journal
|July 1, 1993
PubMed
Summary
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Open-heart surgery can cause neurological issues. Postoperative EEG and somatosensory evoked potentials show changes, but risk factors remain unidentified.

Area of Science:

  • Neurology
  • Cardiovascular Surgery

Background:

  • Open-heart surgery involves cardiopulmonary bypass.
  • Neuropsychiatric complications can occur post-surgery.

Purpose of the Study:

  • To assess clinical and neurophysiological changes after open-heart surgery.
  • To identify risk factors for postoperative neurological disturbances.

Main Methods:

  • Prospective study of 63 patients undergoing open-heart surgery.
  • Evaluated clinical status, electroencephalography (EEG), evoked potentials, cardiovascular reflexes, and neuropsychological tests pre- and post-surgery.

Main Results:

  • 30% had no symptoms, 56% mild, 14% severe neurological complications.
  • EEG showed increased delta-theta, decreased alpha, and slower dominant frequency.

Related Experiment Videos

  • Somatosensory evoked potentials (N20 latency) increased; cardiovascular reflexes showed autonomic neuropathy-like changes.
  • Visual retention and Rorschach tests improved slightly; other psychometric variables unchanged.

    • Conclusions:

    • Minor clinical and neurophysiological disturbances persist despite improved surgical techniques.
    • No specific pre- or peri-operative risk factors for these complications were identified.