Objectives: To investigate the effects of acupuncture at GV20 and EX-HN1 on cerebral blood flow (CBF) velocity cerebrovascular reactivity (CVR) in middle arteries (MCA) anterior (ACA) to compare GV20.Methods: The study was a randomized, crossover trial that included 10 healthy men aged 20 29 years who underwent treatment four times with washout period one week. CBF CVR were measured by transcra...

To the Editor: We read with interest the article by Wang et al1 regarding the use of transcranial Doppler sonography to assess middle cerebral artery flow parameters in patients with serious brain injury. The importance of developing noninvasive techniques to monitor intracranial pressure in patients at risk of developing raised intracranial pressure remains challenging, but if achieved, they h...

The Stroke Prevention Trial in Sickle Cell Anemia (STOP) was a randomized multicenter controlled trial comparing prophylactic blood transfusion with standard care in sickle cell anemia (SCA) children aged 2 to 16 years selected for high stroke risk by transcranial Doppler (TCD). More than 2000 children were screened with TCD to identify the 130 high-risk children who entered the randomized tria...

Thomas JH: Incidence of recurrent stenosis after carotid endarter-ectomy determined by digital subtraction angiography. Digital transvenous angiography in follow-up examinations after carotid reconstruction. SUMMARY Doppler analysis of flow in intracranlal arteries is now possible using a 2 MHz probe allowing sufficient penetration of bone to obtain signals noninvasivety. Thirty-two normal subj...

BACKGROUND AND PURPOSE Carotid endarterectomy clearly benefits patients with symptomatic severe stenosis (SCS), but the risk of stroke is so low for asymptomatic patients (ACS) that the number needed to treat is very high. We studied transcranial Doppler (TCD) embolus detection as a method for identifying patients at higher risk who would have a lower number needed to treat. METHODS Patients ...

Transcranial Doppler (TCD) ultrasonography is a technique that uses a hand-held Doppler transducer (placed on the surface of the cranial skin) to measure the velocity and pulsatility of blood flow within the intracranial and the extracranial arteries. Introduced by Rune Aaslid in 1982, it has become indispensable in clinical practice. The main obstacle to ultrasound penetration of the skull is ...

BACKGROUND AND PURPOSE Cerebral embolism with clinical sequelae may rarely complicate cardioversion and cardiac catheterization. Transcranial Doppler sonography has recently been introduced to monitor microemboli entering the middle cerebral artery in cardiac and carotid surgery. We therefore used this technique to evaluate the risk of asymptomatic embolism during common cardiac procedures. M...

UNLABELLED The clinical course of patients with fulminant hepatic failure (FHF) is often worsened by the presence of cerebral edema and endocranial hypertension. In spite of the multiple studies using Transcranial Doppler Sonography (TCDS), few have shown the cerebral blood flow (CBF) pattern among patients with encephalopathy resulting from FHF. OBJECTIVE Our objective was to characterize th...

BACKGROUND AND PURPOSE There is growing evidence for affection of cerebral vessels during human immunodeficiency virus (HIV) infection. We prospectively evaluated cerebrovascular reserve capacity (CRC) in HIV-seropositive patients by transcranial Doppler sonography (TCD) after systemic administration of acetazolamide. We hypothesized that a disturbed vasoreactivity would reflect the cerebral ar...

BACKGROUND AND PURPOSE Despite prominent neurological symptoms reported in Takayasu arteritis (TA), a complete evaluation of the cerebral circulation has not been consistently performed. The purpose of this study is to describe MR angiography (MRA), color Doppler flow imaging, and transcranial Doppler (TCD) findings in the extracranial and intracranial cerebral arteries in TA. METHODS MRA, co...