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Cerebral microemboli during left heart catheterization

A Fischer1, C Ozbek, W Bay

  • 1Department of Neurology, University of the Saarland, Homburg/Saar, Germany.

American Heart Journal
|January 8, 1999
PubMed
Summary
This summary is machine-generated.

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Microemboli signals (MES) are common during left heart catheterization (LHC), often caused by microbubbles from contrast media. Reducing gas content in fluids significantly lowers MES rates, which appear clinically silent.

Area of Science:

  • Neuroscience
  • Cardiology
  • Medical Imaging

Background:

  • Microemboli signals (MES) are a potential complication during left heart catheterization (LHC).
  • Understanding the incidence and sources of MES during LHC is crucial for patient safety.

Purpose of the Study:

  • To quantify the rate of cerebral microemboli signals (MES) during left heart catheterization (LHC).
  • To identify the primary sources of MES during LHC procedures.

Main Methods:

  • Transcranial Doppler ultrasonography was used to monitor middle cerebral arteries for MES during LHC.
  • Seventy-two patients undergoing LHC and 29 patients undergoing LHC with subsequent coronary intervention were studied.

Main Results:

  • A mean of 95 +/- 45 MES were detected during standardized LHC, with 67.5% linked to contrast/saline injection.

Related Experiment Videos

  • Rotablation during coronary interventions showed a massive increase in MES.
  • Using injection fluids with lower gas content reduced MES by 67% (P < .05).
  • All detected MES were clinically silent.

    • Conclusions:

    • Cerebral microembolism is a frequent occurrence during LHC.
    • The findings suggest that microbubbles, not solid emboli, are the main cause of MES during diagnostic LHC.
    • High MES rates during rotablation may stem from cavitation bubbles; clinical outcomes of these MES appear benign.