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Related Experiment Video

Updated: Apr 12, 2026

Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
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Hemispheric differences in malignant middle cerebral artery stroke.

Vaibhav Rastogi1, Damon G Lamb2, John B Williamson2

  • 1Department of Neurology, University of Florida College of Medicine, Gainesville, FL 32611, United States.

Journal of the Neurological Sciences
|May 12, 2015
PubMed
Summary
This summary is machine-generated.

Malignant middle cerebral artery infarctions (MMCA) are more common in the right hemisphere, leading to worse outcomes. Further research is needed to understand this laterality and develop new treatments.

Keywords:
Autonomic dysfunctionDecompressive hemicraniectomyInsulaLateralityMalignant middle cerebral artery strokeNorepinephrine

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Area of Science:

  • Neurology
  • Stroke Medicine
  • Neuroimaging

Background:

  • Previous findings indicated worse outcomes for left vs. right hemisphere cerebral infarctions.
  • Clinical observations suggested a higher incidence of malignant middle cerebral artery infarctions (MMCA) in right-sided strokes.

Purpose of the Study:

  • To investigate if stroke laterality influences the severity and outcomes of MMCA.
  • To determine the association between hemispheric location and sequelae of MMCA.

Main Methods:

  • A systematic literature search was conducted on PubMed using keywords related to MMCA.
  • Data from 73 relevant studies were analyzed, encompassing 2673 patients with MMCA.

Main Results:

  • Right hemispheric involvement was more frequent in MMCA (63% of 2673 patients).
  • While mortality rates were comparable (31% right vs. 36% left), morbidity was significantly higher in right hemispheric MMCA.
  • Right MMCA occurred in 1687 patients, left in 144.

Conclusions:

  • MMCA appears to be more prevalent in the right hemisphere.
  • Right-sided MMCA is associated with increased morbidity.
  • Further prospective studies are required to elucidate the mechanisms of laterality and explore novel therapeutic strategies for MMCA.