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Intracranial microembolic signals during radiofrequency ablation of accessory pathways
D Georgiadis1, M Hill, H Kottkamp
1Department of Neurology, University of Münster, Germany.
The American Journal of Cardiology
|October 7, 1997
Abstract:
Intracranial microembolic signals, probably caused by gaseous emboli, are readily detectable in patients undergoing radiofrequency ablation in the left side of the heart only. Clinical value of the detected signals could not be equivocably assessed, because only 2 of the patients who were examined (both emboli positive) had transient neurologic symptoms.
Insights
Intracranial microembolic signals were detected during left-sided radiofrequency ablation. However, their clinical significance remains unclear due to limited neurologic symptoms observed in patients.
Area of Science:
- Neurology
- Cardiology
- Medical Imaging
Background:
- Radiofrequency ablation (RFA) is a common procedure for treating cardiac arrhythmias.
- The potential for embolic events during RFA, particularly in the left heart, is a concern.
- Intracranial microembolic signals (IMES) can indicate embolic phenomena.
Purpose of the Study:
- To investigate the detectability of IMES during left-sided RFA.
- To assess the clinical relevance of detected IMES in patients undergoing the procedure.
Main Methods:
- Transcranial Doppler ultrasound was used to monitor for IMES.
- Patients undergoing radiofrequency ablation on the left side of the heart were included.
- Neurologic symptoms were monitored post-procedure.
Main Results:
- IMES were readily detectable in patients undergoing left-sided RFA.
- Gaseous emboli are the probable cause of the detected IMES.
- Only two patients (both IMES positive) experienced transient neurologic symptoms, limiting clinical value assessment.
Conclusions:
- Intracranial microembolic signals are detectable during left-sided radiofrequency ablation.
- The clinical significance of these signals requires further investigation due to limited observed symptoms.