No abstract available.
Aneurysm ; Basilar Artery

No abstract available.
Basilar Artery ; Vertebral Artery ; Vertebral Artery Dissection

No abstract available.
Basilar Artery ; Brain Injuries ; Infarction

There have been known two routes in pterional approach to the distal basilar artery aneurysms : one is via the space between the optic nerve and internal carotid artery(optic-carotid triangle: OCT) and the other is lateral to the ICA(retrocarotid approach : RCA). Although the approach via OCT has several advantages of its own, it had been considered to be used in a very limitted cases. Since we successfully clipped the aneurysms via OCT in 4 cases out of 12(33%), neuroradiological findings observed in these 4 cases are analyzed and reported. Measurement were made in the following items on the cartoid angiogram of the cases operated via OCT(OCT group) and RCA(RCA group) : the distance of ICA bifurcation from midline(D), height of ICA bifurcation from the base line between anterior and posterior clinoid process(H). Although these two values seemed to be higher in OCT group than those in RCA group, no significant difference was found. The product of D and H(D x H) was observed to be significantly higher in OCT group than in RCA group. The value of DxH is considered one of the indicaters of the size of OCT and is proved to be useful to judge whether approach via OCT is applicable or not. The approach via OCT has several such advantages as no injury to the occulomotor nerve, less retraction to ICA and easy visualization of p1 segment of the opposite side. The space of OCT can be used not only for clipping itself but also as a line of sight to the deep structures as well as clip applied from other routes.
Aneurysm ; Basilar Artery* ; Intracranial Aneurysm* ; Optic Nerve

Kissing aneurysms associated with a proximal basilar artery fenestration are an exceedingly rare and unique therapeutic challenge due to anatomical complexity. This report describes double-barrel stent-assisted technique with dual closed-cell stents for the successful endovascular coiling of kissing aneurysms from a proximal basilar artery fenestration.
Aneurysm* ; Basilar Artery* ; Embolization, Therapeutic ; Stents*

No abstract available.
Basilar Artery* ; Rabbits* ; Vasoconstrictor Agents* ; Vasodilator Agents*

No abstract available.
Basilar Artery ; Female ; Ovarian Hyperstimulation Syndrome

No abstract available.
Arteries* ; Basilar Artery* ; Magnetic Resonance Imaging*

Surgical approaches for aneurysms of the basilar artery trunk are variable and utilized depending on the location of the aneurysms and direction of the fundus of the aneurysms. We operated one patient with low lying basilar bifurcation aneurysms facing toward the brain stem by subtemporal transpetrosal approach with successful clipping of aneurysms. The advantage of this approach to low-lying basilar bifurcation or basilar trunk aneurysms over the pterional, subtemporal(transtentorial), combined supratentorial and infratentorial, transoral, and suboccipital approach are discussed.
Aneurysm* ; Basilar Artery ; Brain Stem ; Deception ; Humans

BACKGROUND: Studies using a transcranial Doppler (TCD) to establish cerebral vasoreactivity (CVR) have mostly focused on the anterior circulation. The purpose of this study is not only to evaluate the feasibility of the power motion mode Doppler (PMD) with a probes fixating device, but also to simultaneously measure the CVR between the middle cerebral artery (MCA) and the basilar artery (BA) during hypercapnea simulated by the rebreathing technique. METHODS: Twenty eight healthy volunteers were enrolled. Baseline hemodynamic values (heart rate, blood pressure) were measured while volunteers sat in a comfortable position for 5 minutes. The TCD was performed in two steps. First, velocities and spectra of the MCAs were simultaneously monitored. Then, the velocities and spectra of the MCA and BA were simultaneously monitored by a headset that included an anterior-posterior probes fixating device. The equation for CVR was ([maximum mean velocity baseline mean velocity] x 100/baseline mean velocity). RESULTS: Baseline mean velocities were revealed as follows: (64.0+/-13.7, 65.0+/-11.9 cm/s in right and left MCA; p>0.05; 67.3+/-12.2, -45.3+/-7.6 cm/s in dominant MCA and BA). CVR did not differ between the dominant MCA and the BA (46.1+/-12.1, 46.0+/-15.1%; p>0.05), nor between the right and left MCAs (46.9+/-15.2, 46.4+/-14.8%; p>0.05). There was a positive linear correlation between the CVR of the dominant MCA and that of the BA (r=0.856; p<0.001). CONCLUSIONS: PMD with a probes fixating device for accurate insonation is a useful tool for evaluating the relative CVR between the MCA and BA. Our study suggests that CVR values of the BA are similar to those of the MCA.
Basilar Artery ; Healthy Volunteers ; Hemodynamics ; Middle Cerebral Artery* ; Volunteers