Grading of Internal Carotid Artery Stenosis:Comparative Analysis of Different Flow Velocity Criteria and Multidetector Computed Tomographic Angiography

2006 ◽  
Vol 13 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Robert A. Bucek ◽  
Stefan Puchner ◽  
Markus Haumer ◽  
Thomas Rand ◽  
Schila Sabeti ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Flow Velocity ◽  
Internal Carotid ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Tomographic Angiography

scholarly journals Anomalous left anterior cerebral artery with hypoplastic right anterior cerebral artery

2018 ◽  
Vol 7 (1) ◽  
pp. 1138-1140
Author(s):  
A Mahajan ◽  
G Goel ◽  
B Das
Keyword(s):  
Computed Tomography ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Cerebral Artery ◽  
Internal Carotid ◽  
Anterior Cerebral Artery ◽  
Computed Tomographic Angiography ◽  
Anterior Communicating Artery ◽  
Computed Tomographic ◽  
Tomographic Angiography

We report an extremely rare anomalous variation of left anterior cerebral artery arising from the contralateral Paraclinoid Internal carotid artery with Hypoplastic right Anterior cerebral artery in a 56 years old female which was incidentally detected on computed tomographic angiography of cerebral vessels. Angiographic identification and characterisation of this anomaly is very important in developing a differential diagnosis and when planning a surgery and endovascular procedure.Keywords: Anterior cerebral artery, Paraclinoid Internal carotid artery, Anterior communicating artery Computed tomography angiography

BLISTER-LIKE ANEURYSMS OF THE ANTERIOR COMMUNICATING ARTERY

Neurosurgery ◽  
2008 ◽  
Vol 62 (4) ◽  
pp. 807-811 ◽  
Author(s):  
Norberto Andaluz ◽  
Mario Zuccarello
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Digital Subtraction Angiography ◽  
Internal Carotid ◽  
Computed Tomographic Angiography ◽  
Anterior Communicating Artery ◽  
Digital Subtraction ◽  
Computed Tomographic ◽  
Tomographic Angiography

Abstract OBJECTIVE Blood blister-like aneurysms are small hemispherical bulges from the dorsomedial wall of the internal carotid artery that resemble berry aneurysms but differ in their clinical and surgical features. On the basis of our literature review, blister-like aneurysms have been reported to occur only at nonbranching sites of the dorsomedial internal carotid artery. In this report on our series of five patients, we describe blister-like aneurysms of the anterior communicating artery (AComA) and discuss important diagnostic and therapeutic aspects unique to them. METHODS In our retrospective review of 719 patients with nontraumatic subarachnoid hemorrhage admitted to our service from 1998 to 2003, 181 (25.17%) patients harbored AComA aneurysms. Five (2.76%) patients (four women, one man) had blister-like aneurysms that were recognized at the time of surgery. RESULTS Initial digital subtraction angiography was diagnostic in only one patient. A second digital subtraction angiogram was diagnostic in one patient but failed to reveal an aneurysm in the remaining three patients; these were eventually diagnosed by computed tomographic angiography. All aneurysms were clipped. At the time of surgery, the aneurysms arose from the horizontal portion of the AComA without any involvement of the branches of the anterior cerebral artery. All presented as blister-like aneurysms that were thin-walled and lacking a surgical neck. On dissection, two of the lesions ruptured. All lesions were treated with straight fenestrated clips through the A1–AComA junction, thus remodeling the AComA. No delayed rupture was noted at the time of the last follow-up evaluation. At the time of discharge, outcomes were good in two patients, fair in two, and poor in the remaining patient. CONCLUSION Blister-like aneurysms constitute technically challenging lesions that may occur at the AComA. Computed tomographic angiography is valuable in diagnosis. Blister-like aneurysms should be suspected when digital subtraction angiography findings are negative for subarachnoid hemorrhage.

Mycotic Aneurysm of the Internal Carotid Artery Presenting with Multiple Cerebral Septic Emboli

Vascular ◽  
2007 ◽  
Vol 15 (4) ◽  
pp. 215-220 ◽  
Author(s):  
Spyros Papadoulas ◽  
Petros Zampakis ◽  
Alexandros Liamis ◽  
Panagiotis A. Dimopoulos ◽  
Ioannis A. Tsolakis
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Mycotic Aneurysm ◽  
Internal Carotid ◽  
Computed Tomographic Angiography ◽  
Septic Emboli ◽  
Computed Tomographic ◽  
Staphylococcus Aureus Bacteremia ◽  
Septic Embolization ◽  
The Brain

Mycotic aneurysms of the extracranial carotid artery are uncommon and always warrant surgical treatment to prevent eventual rupture and death. Septic embolization to the brain is an even rarer complication of these aneurysms. We present a case of a 79-year-old male with an extracranial internal carotid artery mycotic aneurysm during Staphylococcus aureus bacteremia. He presented with hemiparesis owing to brain embolism from multiple septic emboli originating from the aneurysm. Multidetector computed tomographic angiography contributed to the diagnosis. Resection of the aneurysm and restoration of arterial supply to the brain by vein graft interpositioning was the therapeutic procedure along with long-term antibiotic treatment. A high index of suspicion is required for the diagnosis of a mycotic carotid aneurysm and aggressive treatment is always needed to prevent lethal complications.

Distinction between Paraclinoid and Cavernous Sinus Aneurysms with Computed Tomographic Angiography

Neurosurgery ◽  
2003 ◽  
Vol 52 (5) ◽  
pp. 1131-1139
Author(s):  
L. Fernando Gonzalez ◽  
Matthew T. Walker ◽  
Joseph M. Zabramski ◽  
Shahram Partovi ◽  
Robert C. Wallace ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Ct Angiography ◽  
Cavernous Sinus ◽  
Intracranial Aneurysms ◽  
Internal Carotid ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Optic Strut ◽  
Tomographic Angiography ◽  
Angiographic Findings

Abstract OBJECTIVE To examine the reliability of using the optic strut as a landmark in computed tomographic (CT) angiography, to differentiate between intradural and extradural (cavernous sinus) aneurysms involving the paraclinoid segment of the internal carotid artery (ICA). METHODS Microanatomic dissections were performed with five cadaveric heads (10 sides), to establish the relationships of the optic strut to the cavernous sinus and the ICA. Results from these anatomic studies were compared with intraoperative and CT angiographic findings for four patients with nine intracranial aneurysms involving the paraclinoid segment of the ICA. RESULTS The inferior boundary of the optic strut accurately localized the point at which the ICA pierced the oculomotor membrane (proximal dural ring) and exited the cavernous sinus. The optic strut and its relationship to the ICA could be well observed on CT angiograms. During surgery, six of six aneurysms that arose distal to the optic strut were identified intradurally and were successfully clipped. Conversely, all aneurysms that arose proximal to the optic strut were observed to lie within the cavernous sinus. An aneurysm at the optic strut was within the clinoid segment or interdural, between the proximal and distal rings. CONCLUSION The optic strut, as identified with CT angiography, provided a reliable anatomic landmark for accurate discrimination between intradural and extradural (cavernous sinus) aneurysms.

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