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SPECT analysis of recent cerebral infarction
C Raynaud1, G Rancurel, N Tzourio
1Service hospitalier Frédéric Joliot, Commissariat a l'Energie Atomique, Orsay, France.
Stroke
|February 1, 1989
Summary
Subacute brain infarcts show distinct central and peripheral changes in regional cerebral blood flow and [123I]iodoamphetamine (IMP) uptake. These early patterns predict chronic-phase findings, offering insights into stroke recovery dynamics.
Area of Science:
- Neurology
- Neuroimaging
- Stroke Research
Background:
- Understanding the temporal evolution of cerebral blood flow and tracer uptake post-stroke is crucial for prognostication.
- Previous studies characterized these changes in the chronic phase of unilateral brain infarcts.
Purpose of the Study:
- To investigate the subacute phase changes in regional cerebral blood flow (rCBF) and [123I]iodoamphetamine (IMP) uptake in patients with unilateral brain infarcts.
- To compare subacute findings with established chronic-phase patterns.
Main Methods:
- Regional cerebral blood flow (rCBF) and [123I]iodoamphetamine (IMP) uptake were measured in 16 patients with unilateral brain infarcts.
- Measurements were taken during the subacute period (Days 3-50) and repeated after 3 months (chronic phase).
Main Results:
- Distinct central and peripheral areas showed differentiated patterns in the subacute period.
- The central area exhibited transient luxury perfusion and prolonged IMP hyperfixation.
- The peripheral area demonstrated decreased rCBF and early IMP uptake reduction, mirroring chronic changes.
Conclusions:
- Cerebral blood flow and IMP uptake patterns in the subacute stroke phase are already differentiated and predictive of chronic-phase changes.
- Contralateral rCBF, considered normal, was significantly lower in the subacute phase compared to the chronic phase.