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Cerebral microemboli during minimally invasive and conventional mitral valve operations

F Schneider1, J F Onnasch, V Falk

  • 1Department of Cardiac Surgery, Heartcenter, University of Leipzig, Germany. felix_schneider@hotmail.com

The Annals of Thoracic Surgery
|October 4, 2000
PubMed
Abstract

Insights

Minimally invasive surgery (MIS) for mitral valve operations does not increase the risk of cerebral microembolism compared to conventional methods. Transcranial Doppler monitoring detected similar numbers of microembolic signals in both techniques.

Area of Science:

  • Cardiovascular Surgery
  • Neurology
  • Medical Technology

Background:

  • Intraoperative cerebral microembolism is a risk factor for postoperative neurological deficits.
  • Minimally invasive surgery (MIS) and conventional (conv.) mitral valve operations are common procedures.
  • Understanding the incidence of cerebral microemboli during these operations is crucial for patient safety.

Purpose of the Study:

  • To compare the frequency of cerebral microembolic signals (MES) during MIS versus conventional mitral valve operations.
  • To investigate the association between MES and different surgical phases in both techniques.

Main Methods:

  • Utilized computer-aided transcranial Doppler (TCD) for intraoperative detection of cerebral microemboli.
  • Monitored 35 patients (21 MIS, 14 conv.) undergoing mitral valve surgery.
  • Analyzed MES rates across three distinct surgical periods: pre-clamping, clamping, and post-declamping.

Main Results:

  • No significant difference in the total number of cerebral MES was observed between MIS and conventional groups.
  • Both groups exhibited the highest MES incidence during the post-declamping phase (P3), coinciding with the heart's effective ejection.
  • Specific MES counts: MIS 1,014+/-753, conv. 937+/-519; P3 MES counts: MIS 875+/-746, conv. 680+/-462.

Conclusions:

  • Transcranial Doppler is an effective tool for detecting cerebral microemboli during both MIS and conventional mitral valve surgery.
  • The study found no evidence of an increased risk of cerebral microembolism with the minimally invasive approach compared to the conventional technique.

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