Intermediate
Technical
IVT
perfusion deficit
Abnormal reduction in cerebral blood flow detected through perfusion imaging techniques.
Full Definition
Perfusion deficit refers to regions of abnormally reduced cerebral blood flow identified through perfusion imaging modalities such as CT perfusion, MR perfusion, or SPECT. These deficits indicate compromised tissue perfusion that may progress to irreversible injury if not promptly addressed. In acute stroke evaluation, perfusion deficits help identify salvageable tissue (penumbra) and guide therapeutic decision-making regarding revascularization procedures.
Usage
Usage note: Distinguish from infarct core (irreversibly damaged tissue) and penumbra (at-risk but salvageable tissue).
In Context
- "CT perfusion revealed a large perfusion deficit in the left MCA territory." — Emergency radiology report
- "The perfusion deficit exceeded the DWI lesion volume by 40 mL." — Stroke imaging assessment
Also known as
hypoperfusion
perfusion abnormality
Contrasted with
hyperperfusion
Don't confuse with
infarct core
penumbra