Repeated injection of contrast medium inducing dysfunction of the blood-brain barrier: case report.

An early 60s-year-old man suffered reversible dysfunction of the blood-brain barrier (BBB) induced by repeated injection of contrast medium during coil embolization of intracranial unruptured aneurysm. He presented with convulsion during coil embolization, and neurological symptoms of aphasia and right hemiparesis continued for 5 days, and then improved completely. All transient radiological abnormalities were limited to the territory of the left internal carotid artery, where contrast medium was injected repeatedly.

Initial experience of a novel sheath guide for transbrachial coil embolization of cerebral aneurysms in the anterior cerebral circulation.

Background: The transfemoral approach is a common technique for coil embolization of cerebral aneurysms in the anterior cerebral circulation. However, it is difficult to advance a guiding catheter into the carotid artery via the femoral route in patients with a tortuous aortic arch, an unfavorable supra-aortic takeoff, aortic diseases, or occlusion of the femoral artery.

Objective: To report our initial experiences of coil embolization of cerebral aneurysms in the anterior cerebral circulation with a novel sheath guide for transbrachial carotid cannulation.

Safety and effectiveness of emergency carotid artery stenting for a high-grade carotid stenosis with intraluminal thrombus under proximal flow control in hyperacute and acute stroke.

Background: A study was undertaken to investigate the feasibility, safety and effectiveness of emergency carotid artery stenting (eCAS) for a high-grade carotid stenosis with intraluminal thrombus (ILT) with or without proximal flow control (PFC).

Methods: Patients with acute ischemic stroke included in the analysis were those who were admitted between 2001 and 2010 with serious neurological symptoms, without a large high-intensity area of diffusion-weighted images and who underwent eCAS for a high-grade carotid stenosis with ILT. Patients underwent eCAS without PFC until 2004 (group C) and under PFC after 2004 (group P).

Long-term angiographic and clinical outcome following stenting by flow reversal technique for chronic occlusions older than 3 months of the cervical carotid or vertebral artery.

Background: Long-term angiographic and clinical outcome following stenting by flow reversal technique (FRT) for chronic occlusions (COs) of the cervical internal carotid artery (ICA) or vertebral artery (VA) is unknown.

Objective: The aim of our retrospective study was to investigate the feasibility, safety, and long-term outcome of stenting by FRT for COs of the cervical ICA or VA.

Methods: Included for analysis were patients (1) who underwent stenting for COs of the ICA or VA older than 3 months by FRT, and (2) who finished at least 1-year follow-up angiographic and clinical investigation.

Predictors of hyperperfusion syndrome before and immediately after carotid artery stenting in single-photon emission computed tomography and transcranial color-coded real-time sonography studies.

Background: Hyperperfusion syndrome (HPS) is a critical complication after carotid artery stenting (CAS) and carotid endarterectomy (CEA).

Objective: To identify predictors of HPS before and immediately after CAS.

Methods: We analyzed patients who underwent elective CAS from 2005 to 2008, and underwent single-photon emission computed tomography (SPECT) and transcranial color-coded real-time sonography before and immediately after CAS.

Successful stenting by combination technique of reverse flow and downstream filtering for long chronic total occlusion of the cervical vertebral artery: technical case report.

Objective: To report a case of successful recanalization using the combination technique of reverse flow and downstream filtering in chronic total occlusion of the bilateral vertebral artery (VA).

Clinical Presentation: A 59-year-old man had experienced attacks consisting of vertigo and/or dysarthria more than 1 year before presentation. He experienced symptoms despite the administration of antiplatelet drugs and presented to our institution.

[Successful removal of clots from embolic carotid occlusion by aspiration with a syringe--case report].

An 84-year-old woman who had experienced a sudden onset of stupor and total aphasia and right-side hemiparesis was admitted to our institution. Emergency MR (diffusion-weighted images: DWIs) studies revealed ischemic changes in the territory of the left middle cerebral artery; findings from the perfusion-weighted images (PWIs) has suggested a reduction of the cerebral blood flow. In addition, the MR angiograms showed no signals in the left carotid-middle cerebral artery.