BACKGROUND AND PURPOSE Delayed cerebral ischemia and vasospasm are significant complications following SAH leading to cerebral infarction, functional disability, and death. In recent years, CTA and CTP have been used to increase the detection of delayed cerebral ischemia and vasospasm. Our aim was to perform comparative-effectiveness and cost-effectiveness analyses evaluating CTA and CTP for de...

Middle cerebral artery dissection (MCAD) is a rare cause for ischemic stroke and is often associated with headache and hemispheric symptoms. In the present report, limb shaking is found to be a major symptom of spontaneous MCAD in a young male. The diagnosis of MCAD is based on the intramural hematoma directly visualized in MR T2-weighted images and supported by serial evolution of transcranial...

BACKGROUND AND PURPOSE Embolic complications during ultrasound examinations are a rare cause of neurological deficits. The present case documents the occurrence of embolism by a nonobstructive compression maneuver during transcranial Doppler examination, resulting in a minor stroke. CASE DESCRIPTION A 63-year-old man suffered from recurrent transient ischemic attacks. Duplex sonography showed...

Background and Purpose: In this study we analyzed the value of ultrasound examination for diagnosis of vertebral artery dissection. Methods: The vertebrobasilar arterial system was assessed in 14 patients using transcranial and extracranial pulsed-wave Doppler and duplex sonography. Results: The dissections were verified by angiography (in 1 patient), magnetic resonance imaging (in 5), or both ...

Delays in diagnosis of brain death have definite consequences for the organ retrieval and transplantation process. It is advisable to use accurate diagnostic methods. Transcranial Doppler sonography is a well-accepted technique for diagnosing cerebral circulatory arrest. However, in some cases, the access to the intracranial circulation via the temporal window is difficult. In 43 brain-dead pat...

BACKGROUND AND PURPOSE Intraprocedural transcranial Doppler sonography has identified multiple microembolic events during and immediately after carotid endarterectomy (CEA) or angioplasty, yet the rate of clinically evident stroke is small. To determine the significance of the transcranial Doppler sonography findings, we examined patients by use of diffusion-weighted imaging and fluid-attenuate...

The goal of this study was the development of a simple bedside test to assess cerebrovascular reserve capacity using transcranial Doppler sonography. We studied 33 normal persons at rest and after stimulation of cerebral blood flow with 1 g acetazolamide. Their mean +/- SD increase in blood flow velocity in 54 middle cerebral arteries 10 minutes after stimulation was 24.4 +/- 9.2 cm/sec. We tri...