Precise in vivo evaluation of cerebral vasospasm caused by subarachnoid hemorrhage has remained a critical but unsolved issue in experimental small animal models. In this study, we used synchrotron radiation angiography to study the vasospasm of anterior circulation arteries in two subarachnoid hemorrhage models in rats. Synchrotron radiation angiography, laser Doppler flowmetry-cerebral blood ...

References 1. Newell DW, Aaslid R, Lam A, Mayberg T, Winn HR. Flow and velocity during autoregulation testing in humans. Stroke. 1994; 25:270. Abstract. 2. Miiller HR, Casty M, Moll R, Zehnder R. Response of middle cerebral artery volume flow. Cerebrovasc Dis. 1991;l:82-89. 3. Muller HR, Casty M, Loeb J, Haefele M, Boccalini P. Transcranial Doppler sonography under lower body negative pressure ...

OBJECTIVE to explore the potential of 3D Power Doppler Angiography (3D PDA) to evaluate the cerebral circulation in normal and growth restricted fetuses (IUGR). STUDY DESIGN in a pilot study, we enrolled 51 appropriate for gestational age (AGA) pregnancies and 17 singleton pregnancies presenting IUGR, all between 22 and 38 weeks of gestation. Using 3D power Doppler ultrasound, a -volume acqui...

Hemodynamic changes were examined with an ultrasonic Doppler flowmeter and with a sound-spectrograph in 5 patients with internal carotid giant aneurysms or with recurrent laryngeal cancer undergoing gradual carotid occlusion. The ultrasonic Doppler technique was useful for preoperative assessment of intracranial cross-filling and as a practical guide for the graded reduction of blood flow in th...

OBJECTIVE To evaluate whether anterior cerebral artery (ACA) Doppler ultrasonography is superior to middle cerebral artery (MCA) Doppler in the prediction of perinatal outcome and neonatal neurobehavior in term small-for-gestational-age (SGA) fetuses with normal umbilical artery (UA) Doppler. METHODS MCA and ACA Doppler ultrasonography was performed in a cohort of SGA term fetuses with normal...

We reported this case to remind neurologists that pulmonary right-to-left shunt is one of the causes paradoxical embolism. A 47-year-old woman was diagnosed with infarction cerebellum vermis by MRI. Atheromatous, immunological, infectious, and hypercoagulable abnormality negated. doubtful arteriovenous malformation (PAVM) accidentally found in process CT angiography subclavian arteries. Then, c...

Umbilical artery\vein, middle cerebral artery, and ductus venosus Doppler velocimetry were performed at 33 weeks of gestation in the settings of an intrauterine growth restricted fetus during a heart rate deceleration. Interestingly, we recorded a sudden onset redistribution of fetal blood flow with fetal bradycardia. Spontaneous normalization of waveforms was observed once fetal heart rate ret...

OBJECTIVE To develop national guidelines on the use of fetal Doppler in obstetrics. OPTIONS Whether umbilical cord artery, umbilical cord venous, ductus venosus, and middle cerebral artery Doppler are useful in assessing fetal health. OUTCOME Prediction of adverse perinatal outcome or prediction of fetal anemia. EVIDENCE MEDLINE search and review of bibliographies in identified articles. ...