circle of willis, medical strokes, syncope, stroke, brain death, brain aneurism, emboli, carotid artery, transient ischemic attack, transcranial doppler, sickle cell anemia, carotid arteries, neurology, doppler, vascular doppler, basilar artery, doppler monitoring, emboli detection doppler, doppler power m mode, subarachnoid hemorrhage

detection and monitoring of vasospasm following an aneurysmal subarachnoid hemorrhage.