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Cerebrovascular reactivity and subcortical infarctions.
L M Cupini1, M Diomedi, F Placidi
1Clinica Neurologica, Universita' di Roma "Tor Vergata," Ospedale S Eugenio, P. le Umanesimo 10, 00144 Rome, Italy. lecupini@tin.it
Archives of Neurology
|May 1, 2001
Summary
Patients with multiple subcortical infarctions show impaired cerebrovascular reactivity (CR). This finding highlights the role of small vessel disease and hypoperfusion in stroke pathogenesis.
Area of Science:
- Neurology
- Vascular Medicine
- Neuroimaging
Background:
- Cerebrovascular reactivity (CR) is crucial for maintaining brain blood flow.
- Ischemic stroke is a leading cause of disability and mortality worldwide.
- Understanding lesion types and their impact on CR is vital for stroke management.
Purpose of the Study:
- To investigate the association between different ischemic lesion types and cerebrovascular reactivity (CR).
- To evaluate the relationship between lesion types, CR, and major stroke risk factors.
Main Methods:
- CR was assessed using the breath-holding index (BHI) technique.
- Transcranial Doppler monitoring of middle cerebral arteries was performed.
- Patients with first-ever ischemic stroke were categorized by lesion type: cortical, single subcortical, and multiple subcortical infarctions.
Main Results:
- The BHI was significantly lower in patients with multiple subcortical infarctions compared to controls, single subcortical, and cortical infarction groups.
- Male sex and a history of hypertension correlated with low CR across all groups.
- Lesion type was the only significant factor influencing the BHI.
Conclusions:
- First-ever stroke patients with symptomatic subcortical infarction and multiple silent infarctions exhibit impaired cerebrovascular reserve capacity.
- The strong association suggests small vessel vasculopathy and hypoperfusion as key pathogenetic mechanisms.
- These findings underscore the importance of CR assessment in stroke patients with specific lesion patterns.