Large artery occlusion in anterior circulation causing ischemic penumbra; EVT restores blood flow but some patients develop malignant MCA infarction requiring decompressive craniectomy (DC)
Target Population
Patients with acute ischemic stroke due to anterior circulation artery occlusion undergoing endovascular thrombectomy
Care Setting
Acute stroke care units and neurosurgical centers performing EVT and DC
Key Highlights
Endovascular thrombectomy (EVT) improves functional outcomes by prompt recanalization but 12–27% of patients fail recanalization or develop malignant MCA infarction.
Malignant MCA infarction has a high fatality rate (~80%) and often necessitates decompressive craniectomy to reduce mortality and improve outcomes.
Despite EVT advances, mortality and disability remain high (40–55.5%) due to cerebral edema and hemorrhagic transformation; early identification of patients needing DC is critical.
Guideline-Based Recommendations
Diagnosis
Identify malignant MCA infarction in AIS patients post-EVT using clinical and imaging predictors.
Monitor for life-threatening cerebral edema and hemorrhagic transformation after EVT.
Management
Perform decompressive craniectomy promptly in patients with malignant MCA infarction to reduce mortality and improve functional outcomes.
Combine DC with standard medical treatment for malignant MCA infarction caused by anterior circulation artery occlusion.
Monitoring & Follow-up
Closely observe patients post-EVT for signs of malignant MCA infarction and neurological deterioration.
Use imaging and clinical assessments to guide early decision-making regarding DC.
Risks
Failure to achieve recanalization after EVT increases risk of malignant MCA infarction.
Some patients require DC despite successful EVT; risk factors are not fully understood and require further research.
Patient & Prescribing Data
Acute ischemic stroke patients undergoing EVT for anterior circulation large artery occlusion
While EVT is effective in many cases, a subset of patients develop malignant MCA infarction necessitating DC; early identification of these patients is essential to optimize outcomes.
Clinical Best Practices
Implement comprehensive clinical and imaging evaluation post-EVT to identify patients at risk for malignant MCA infarction.
Consider early surgical consultation for DC in patients showing signs of malignant MCA infarction despite EVT.
Adopt multidisciplinary approach integrating neurology, neurosurgery, and critical care for management decisions.
Follow PRISMA guidelines for systematic evidence synthesis to inform clinical protocols.
