Optic Nerve and Chiasma Compression by a Dolichoectatic Internal Carotid Artery

1998 ◽  
Vol 11 (2) ◽  
pp. 199-201
Author(s):  
A. Blandino ◽  
M. Longo ◽  
F.M. Salpietro ◽  
C. Alafaci ◽  
C. Narbone ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Mr Angiography ◽  
Internal Carotid ◽  
Neurovascular Conflict ◽  
Unusual Type

We describe an unusual type of neurovascular conflict between an elongated internal carotid artery and the optic nerve-chiasma complex. The fundamental role of conventional MR and MR angiography in the demonstration of the neurovascular conflict is illustrated.

Abstract WMP40: Cervical Internal Carotid Artery Tortuosity as a Marker of Non-Atherosclerotic Aging: Results From the Northern Manhattan Study (NOMAS)

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Farid Khasiyev ◽  
Tatjana Rundek ◽  
Chensy Marquez ◽  
Clinton B. Wright ◽  
Ralph Sacco ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Genetic Disorders ◽  
Matrix Remodeling ◽  
Plaque Area ◽  
Blood Pressures ◽  
The Right ◽  
Cervical Internal Carotid Artery

Background: Cervical internal carotid artery (ICA) tortuosity has been associated with vascular risk and stroke as well as genetic disorders related to abnormal extracellular matrix remodeling. It is plausible that dystrophic or aberrant arterial remodeling may therefore relate to cervical ICA tortuosity. We hypothesized that cervical ICA tortuosity relates to carotid dilatation, but not to traditional ultrasound (US) markers of atherosclerosis. Methods: Subjects of the NOMAS with available time-of-flight MRA were included in our study. Cervical ICA tortuosity was defined as a bend in the distal cervical ICA of > 90° as seen on MRA. We excluded subjects with < 5 cm of the cervical ICA visualized. Distensibility was calculated as the percentage excursion of the right CCA diastolic diameter during systole, which was assessed by high-resolution B-mode US of the right common carotid artery (CCA). We used multivariable logistic regression analyses to estimate odds ratios for the association of cervical ICA tortuosity and Doppler measures of carotid wall aging. Results: We visualized cervical ICA tortuosity in 468 NOMAS participants (mean age 64±8 years, 70% women, 70% Hispanic). It was present in 23% of subjects. In unadjusted models, cervical ICA tortuosity was more common in women (OR 2.34, 95% CI 1.34-4.11), Hispanics (OR 1.85, 95%CI 1.06-3.25) and those with higher diastolic blood pressures (OR per mm Hg 1.04, 95%CI 1.01-1.06), and less common among smokers (OR 0.23, 95%CI 0.07-0.78). In models adjusted for demographic and vascular risks, right CCA tortuosity was associated with ipsilateral larger CCA DD (OR 1.42, 95%CI 1.02-1.96) and borderline associated with lower distensibility (OR 0.94, 95%CI 0.87-1.01, P=0.06) but not with ipsilateral ICA IMT (OR 0.26, 95%CI 0.14-4.77), number of plaques (OR 1.08, 95%CI 0.76-1.53), maximum plaque thickness (OR 0.96, 95%CI 0.73-1.27), or plaque area (1.00, 95%CI 0.97-1.05). Conclusions: Cervical ICA tortuosity associates with ipsilateral cervical ICA dilatation and lower distensibility, but not with traditional US markers of atherosclerosis. The association with diastolic blood pressure suggests a role of steady, rather than pulsatile, hemodynamics in aberrant cervical ICA remodeling.

Retinal and Optic Nerve Ischemia due to an Internal Carotid Artery Dissection: The “Cup of Wine” Sign

2020 ◽  
Vol 83 (3) ◽  
pp. 325-326
Author(s):  
Jordi Sarto ◽  
Gerard Mayà-Casalprim ◽  
Álvaro Carbayo ◽  
Daniel Santana ◽  
Xabier Urra
Keyword(s):  
Optic Nerve ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Carotid Artery Dissection ◽  
Artery Dissection ◽  
Internal Carotid Artery Dissection

Compressive optic nerve atrophy resulting from a distorted internal carotid artery

2000 ◽  
Vol 22 (4) ◽  
pp. 322-324 ◽  
Author(s):  
Tatsuya Ishikawa ◽  
Tatsuhiko Ito ◽  
Eiichi Shoji ◽  
Kazuhisa Inukai
Keyword(s):  
Optic Nerve ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Optic Nerve Atrophy

Parameters for Contralateral Approach to Ophthalmic Segment Aneurysms of the Internal Carotid Artery

Neurosurgery ◽  
2000 ◽  
Vol 47 (5) ◽  
pp. 1130-1137 ◽  
Author(s):  
Yukinari Kakizawa ◽  
Yuichiro Tanaka ◽  
Yasser Orz ◽  
Tomomi Iwashita ◽  
Kazuhiro Hongo ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Bone Resection ◽  
Pterional Approach ◽  
Aneurysm Neck ◽  
Contralateral Approach ◽  
Ophthalmic Segment Aneurysms ◽  
Contralateral Pterional Approach

Abstract OBJECTIVE This study was undertaken to define more accurately the feasibility and indications of the contralateral pterional approach to ophthalmic segment aneurysms of the internal carotid artery (ICA). METHODS Between 1995 and 1999, 46 patients with ophthalmic segment aneurysms of the ICA were surgically treated in our institution. Eleven of the 46 aneurysms were operated using the contralateral pterional approach. All aneurysms were successfully clipped without complications; three patients required bone resection around the aneurysm neck. We studied the 11 patients who were treated with the contralateral approach by defining six parameters to assess the feasibility of the approach and to predict the necessity for bone resection: 1) Parameter A, the distance between the anterior aspect of the optic chiasm and the limbus sphenoidale; 2) Parameter B, the distance between the bilateral optic nerves at the entrance to the optic canal; 3) Parameter C, the interrelation of the optic nerve and the ICA, expressed as a/b in which a is the length from the midline to the optic nerve and b is the length from the midline to the ICA; 4) Parameter D, the size of the aneurysm neck; 5) Parameter E, the direction of the aneurysm from the ICA wall on the anteroposterior angiogram; and 6) Parameter F, the distance from the medial side of the estimated distal dural ring to the proximal aneurysm neck on the lateral angiogram. RESULTS Parameters A to F were 8.8 mm (range, 5.4–11.1 mm), 14.5 mm (range, 10.4–22.2 mm), 0.9 mm (range, 0.6–1.3 mm), and 3.0 mm (range, 2.3–4.7 mm), 5 to 160 degrees, and 1.3 mm (range, 0.3–2.4 mm), respectively. All patients had excellent operative outcomes without visual dysfunction. Three patients required drilling of the bone around the optic canal on the craniotomy side; bone drilling was not required when Parameter E was between 30 and 160 degrees and Parameter F was more than 1 mm. CONCLUSION Parameters A to D are important for assessing the feasibility of the contralateral approach to ICA-ophthalmic segment aneurysms, and Parameters E and F are most useful for calculating the difficulty of this approach.

MR Angiography of Anomalous Branches of the Internal Carotid Artery

2003 ◽  
Vol 181 (5) ◽  
pp. 1409-1414 ◽  
Author(s):  
Akira Uchino ◽  
Akihiro Sawada ◽  
Yukinori Takase ◽  
Sho Kudo
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Mr Angiography ◽  
Internal Carotid
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