Types of CVAIschemic CVA and Hemorrhagic CVA

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Ischemic CVA –> Blockage in cerebral blood vessel
Thrombus or embolus – foreign object that at a distant site, circulates in bloodstream and becomes lodged in blood vessel
- Blood clot, fat globule, bubble of air or gas, foreign material
- Thrombus – formed in vessel/blocks that vessel
- Embolus – particle from thrombus that detaches and travels through vessels
85% of CVAs – 60% thrombotic; 40% embolic
Core – central zone of ischemic tissue
Penumbra – surrounding tissue receiving diminished blood supply
- Potentially salvageable if blood supply is restored quickly
Hemorrhagic CVA –> Rupture of a blood vessel
15% of all CVAs
Factors: hypertension, anticoagulation, tumor, substance abuse, aneurysm
- Aneurysm – weakening in blood vessel wall → ruptures with added pressure
2 types of hemorrhagic CVA
- Intracerebral
- Subarachnoid
Much higher mortality than occlusive strokes
Pressure that is causing damage gradually diminishes and brain regains some of its former function

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