Hemodynamic changes of cerebrovascular in aneurysmal subarachnoid hemorrhage by TCD

Objective To explore hemodynamic changes of cerebral vasospasm after aneurysmal subarachnoid hemorrhage(SAH).Methods 179 patients with aneurysmal SAH were examined by CT and DSA.Blood flow parameters and plateau waves of middle cerebral artery(MCA)were recorded and analyzed with bedside transcranial Doppler ultrasonography(TCD)before operation and at 1～3d,5～7d,9～11d,12～14d after operation.Results Mean flow velocity(Vm)in MCA augmented at 1～3d and reached peak at 5～7d and 9～11d after SAH.There will be a better outcome if Lindegaard index in 3～6.However,there would be higher mortality and neurological deficits when Lindegaard index over 6,intracranial hypertension and cerebral vasospasm.Conclusion TCD could detect the dynamic hemodynamic changes in noninvasive way and timely following SAH can be useful for diagnosis and prognosis of CVS.