Doppler analysis of flow in intracranial arteries is now possible using a 2 MHz probe allowing sufficient penetration of bone to obtain signals noninvasively. Thirty-two normal subjects, and 11 patients with cerebrovascular diseases including vasospasm following subarachnoid hemorrhage, middle cerebral artery stenosis, and extracranial internal carotid artery stenosis were studied by transcrani...

BACKGROUND AND PURPOSE Acute thromboembolic stroke complicated by ipsilateral carotid occlusion may present both mechanical and inflow-related barriers to effective intracranial thrombolysis. We sought to review our experience with a novel method of mechanical thrombectomy, in such cases, using the Possis AngioJet system, a rheolytic thrombectomy device. METHODS A review of our interventional...

Autologous fat injection is a common aesthetic procedure for soft-tissue augmentation of the face. Although this procedure is generally regarded as safe, several patients have experienced acute visual loss or cerebral infarction after these injections. We describe a case of internal and external carotid artery fat embolism that occurred following injection of autologous fat into the face. It ap...

A technically unsatisfactory end point (transition from the removed diseased plaque to normal distal intima) leading to an intimal flap of the external carotid artery has been identified as a source of perioperative stroke. The mechanism involves thrombus formation with retrograde propagation of the thrombus and subsequent embolization of the internal carotid artery. This report describes three...

CONTEXT The annual risk of ischemic stroke in patients with asymptomatic carotid artery stenosis is about 2% during the short-term (2-3 years), but the long-term risks of stroke and other vascular events are unknown, although they may affect surgical decision making. OBJECTIVE To evaluate the long-term risk of stroke and other vascular events in patients with asymptomatic carotid artery steno...

Dissecting aneurysm of the internal carotid artery, without preceding trauma, is a rare event. We have been unable to find a previous case report. One case of dissecting aneurysm of the internal carotid artery following head injury has been reported (Dratz and Woodhall, 1947), and two cases after carotid puncture for arteriography (Sirois, Lapointe, and Cote, 1954; de Grood, 1954) where the com...

The internal and external carotid arteries are usually considered occluded distal to a common carotid artery occlusion but some collateral vessels may provide blood keeping the internal and external carotid arteries patent distal to the occlusion. Most common communication in such a case is diversion of blood from muscular branches of the vertebral artery to occipital branch of the external car...

The following matter needs to be addressed. In his seminal works on the circulus arteriosus in Cerebri Anatome in 1664 and De Anima Brutorum in 1672, Thomas Willis described the blood supply to the base of the brain in a number of animal species and, more importantly, founded the discipline of clinical neuroscience. The detailed comparative physiology and species differences between ovine and b...

OBJECTIVES Extracranial carotid artery true aneurysm is extremely uncommon, and definite treatment has traditionally involved open surgical repair. Although successful management of the internal carotid artery aneurysms using endovascular stenting and embolization has recently been reported, only a limited number of cases have been reported. METHODS We present a case of symptomatic carotid tr...

We report a 30-year-old patient who was involved in a high-velocity road traffic accident and developed a left-sided hemiparesis, which was noted in the post-operative period following bilateral femoral intramedullary nailing. CT scanning of the brain revealed infarcts in the right frontal and parietal lobes in the distribution of the right middle cerebral artery. CT angiography showed occlusio...