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Predicting Hemodynamic Changes of Cerebral Blood Flow during Temporal Carotid Occlusion: A Review of Current
Miloslav Spacek1, Cyril Stechovsky1, Martin Horvath1
1Department of Cardiology, Motol University Hospital, 2nd Medical School, Charles University, V Úvalu, Prague, Czech Republic.
Insights
Understanding cerebral collateral circulation is crucial for managing carotid artery disease (CAD) during carotid artery stenting (CAS). Transcranial Doppler ultrasound (TCD) aids in monitoring, but its predictive role for hypoperfusion needs further study.
Area of Science:
- Neurology
- Vascular Surgery
- Medical Imaging
Background:
- Carotid artery disease (CAD) is a significant risk factor for stroke, with prevalence increasing in aging populations.
- Cerebral collateral circulation significantly modifies stroke risk and clinical presentation in patients with CAD.
- Carotid artery stenting (CAS) is an established treatment for severe CAD, with evolving protection systems.
Purpose of the Study:
- To discuss the role of cerebral collateral circulation in the context of CAD and CAS.
- To summarize current knowledge on evaluating collateral circulation using Transcranial Doppler ultrasound (TCD).
- To explore future implications of TCD in protecting patients from periprocedural hypoperfusion during CAS.
Main Methods:
- Review of existing literature on cerebral collateral circulation and its assessment.
- Discussion of the utility of Transcranial Doppler ultrasound (TCD) for real-time hemodynamic monitoring during CAS.
- Analysis of TCD's potential role in predicting and preventing periprocedural hypoperfusion.
Main Results:
- Cerebral collateral circulation is a key factor in modifying stroke risk associated with CAD.
- Transcranial Doppler ultrasound (TCD) is valuable for real-time hemodynamic monitoring during CAS.
- The predictive value of TCD for periprocedural hypoperfusion requires further investigation.
Conclusions:
- Understanding collateral circulation is vital for patient safety during CAS.
- TCD offers real-time insights into cerebral hemodynamics, aiding procedural management.
- Further research is needed to establish TCD's role in predicting and mitigating hypoperfusion risks in CAS.
Abstract:
Carotid artery disease (CAD) plays an important role in the stroke development and its prevalence increases with aging of the population. Its wide variability of clinical manifestation ranges from incidental asymptomatic finding to devastating or fatal stroke, although cerebral collateral circulation is considered one of the major modifying factors. Over time, carotid artery stenting (CAS) has evolved into a reputable method for the treatment of patients with severe CAD. With expanding use of proximal protection systems resembling surgical clamp, there is an increasing demand to understand collateral cerebral circulation to protect patients from periprocedural hypoperfusion, which increases the risk of cerebral events. Transcranial Doppler ultrasound (TCD) is a useful tool allowing monitoring in real time during procedure patient́s cerebral hemodynamic status providing the operator with valuable information. Its role in predicting periprocedural hypoperfusion is, however, less well established. In this article, we discuss the role of cerebral collateral circulation, summarize the current knowledge regarding its evaluation with TCD and suggest future implications for CAS.
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