Cerebral vasospasm after subarachnoid haemorrhage is a potentially preventable and reversible condition where an early identification can prevent or limit cerebral infarction. Vasospasm may be assessed on a clinical, radiographic, or angiographic basis.
Aim: Early detection of cerebral vasospasm in a sample of Egyptian patients presented with spontaneous subarachnoid haemorrhage.
Methods and subjects: In this study we enrolled 40 aSAH patients diagnosed by non-contrast brain CT and CT angiography and  managed by interventional aneurysmal embolization . Early detection of vasospasm and DCI was assessed on clinical and radiological basis using  transcranial duplex studies (TCD) on the 1^st, 3^rd, 5^th, 7^th and 10^th days of the onset of the symptoms .         Results:  Fourty patients with aSAH , of them 67.5% developed vasospasm but only  33.3% progressed to DCI. The most significant day of vasospasm development as detected by TCD was on the 7^th day.The most common arteries undergoing vasospasm were the MCA followed by the ACA and lastly the PCA. Clinical scalas on admission   as (GCS,HHS,WFNS and Ogilvy and Carter scale) are highly significant predictors of  cerebral vasospasm 
Conclusion: Clinical risk factors and the use of  TCD are tools for early detection of vasospasm following SAH. This allows for early therapeutic intervention before irreversible ischemic neurological deficits take place.