1. SUBARACHNOID HAEMORRHAGE I.ANEURYSM AND AVM II.TRAUMA III.INFECTIONS IV.NEOPLASIA V.TOXIC VI.INFLAMMATORY VII.DEGENERATIVE CAUSES

4. CLINICAL FEATURES WARNING SYMPTOMS---HEADACHE,DIZZINESS,ORBITAL PAIN,DIPLOPIA,LOSS OF VISION,MOTOR AND SENSORY DEFICIT,FITS,CRANIAL NERVE PALSY(3 NERVE),DYSPHASIA SYMPTOMS OF SAH--- MENINGISM,NAUSEA,VOMOTING, OCCIPITAL HEADACHE,LATERAL HEADACHE,DYSPHASIA CONFUSION,INTRA-OCULAR PAIN,ANISOCORIA,PAPILLEDEMA HOMONYMUS HEMIANOPSIA,3 NERVE PALSY, THROMBOEMBOLIC PHENOMENON GIANT ANEURYSMS AS SOL MULTIPLE CRANIAL NERVE PALSIESH

7. CEREBRAL VASOSPASM 1)BLOOB CLOT AND DEGRADATION PRODUCT 2)OXY HAEMOGLOBIN,METHEMGLOBIN 3)SEROTONIN,FDP,IRON,THROMBOXONA2,CATECH OLAMINE,PROSTAGLANDIN,ANGIOTENSIN,VASO PRESSIN,POTASSIUM,FALL IN NITRIC OXIDE,RISE IN ENDOTHELIN TREATED BY 3H Hypertension,Hypervolemia,Haemodilution Calcium Channel blocker nimodipine nicardipine etc Clot removal Baloon angioplasty

13. TREATMENT OPTIONS  Microsurgical clipping  GDCOIL  Embolization and excision of avm  Gamma Knife  Treatment of other conditions according to their pathologies  ICU