| Etiology | Frequency | History By Patient | CT Scan | Doppler* | Therapy |
|---|---|---|---|---|---|
| Embolic | 55% | Sudden, Maximal Onset | normal<24hrs | decreased | TPA,Heparin,ASA |
| Lacune | 15% | HTN; Gradual Onset | lacunes | -- | Treat HTN |
| Carotid Dz | 10% | Sudden Occlusion / TIA's | MCA** stroke | ++ | Surgery, APA |
| Vert-basilar | 10% | Spells, Syncope | MRI | +/- | Heparin, ASA |
| Hemorrhagic | 10% | HTN | positive for blood | -- | Surgery,Nimodipine |
| HTN=Hypertension | |||||
| APA=antiplatelet agent such as clopidogrel or ticlopidine | |||||
| *Carotid Doppler results | |||||
| **changes consistent with old middle cerebral artery (MCA) stroke may be seen | |||||