Surgically verified variations in the A1 segment of the anterior cerebral artery

1991 ◽  
Vol 75 (6) ◽  
pp. 950-953 ◽  
Author(s):  
Johannes Mäurer ◽  
Elisabeth Mäurer ◽  
Axel Perneczky
Keyword(s):  
Optic Nerve ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Optic Tract ◽  
The Other ◽  
Content Type ◽  
Fine Print

✓ Two patients with rare variations of the A1 segment of the anterior cerebral artery are presented. One patient had a perforation of the optic tract by an abnormal course of the A1 segment, and the other harbored an aneurysm of the A1 segment running below the optic nerve. The authors present a summary of A1 segment variations described in the literature.

Carotid-anterior cerebral artery anastomosis

1976 ◽  
Vol 44 (3) ◽  
pp. 378-382 ◽  
Author(s):  
Stephen Nutik ◽  
Domenico Dilenge
Keyword(s):  
Optic Nerve ◽  
Cerebral Artery ◽  
Ophthalmic Artery ◽  
Internal Carotid ◽  
Anterior Cerebral Artery ◽  
Optic Chiasm ◽  
Anterior Communicating Artery ◽  
Content Type ◽  
Anatomical Features ◽  
Fine Print

✓ The angiographic and anatomical features of an anomalous communication between the intradural internal carotid artery and the anterior cerebral artery are described. Essential features of the anastomosis include an origin at, or close to, the origin of the ophthalmic artery, a course ventral to the ipsilateral optic nerve and anterior to the optic chiasm, and a termination near the anterior communicating artery. Although rare, the condition should be considered as an entity. The incidence of associated berry aneurysm and other congenital vascular anomalies is high.

Bilateral innervation of the cerebral arteries by the superior cervical ganglion in cats

1980 ◽  
Vol 53 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Jesús Marín ◽  
Mercedes Salaices ◽  
Fernando Rivilla ◽  
Javier Burgos ◽  
Emilio J. Marco
Keyword(s):  
Cerebral Artery ◽  
Superior Cervical Ganglion ◽  
Anterior Cerebral Artery ◽  
Contractile Response ◽  
Cerebral Arteries ◽  
The Other ◽  
Content Type ◽  
Cervical Ganglion ◽  
The Right ◽  
Fine Print

✓ The effect of removal of the left superior cervical ganglion on the contractile response to norepinephrine (NE) and 5-hydroxytryptamine (5-HT, serotonin) was studied in isolated segments of the middle cerebral artery (MCA) and posterior communicating artery (PCoA) of the cat. Fifteen days after the excision, each dose of NE elicited a potentiated response in both the MCA and the PCoA, whichever side they originated. By contrast, 5-HT induced enhanced vasoconstriction at each dose only in the MCA and PCoA from the left side. When segments of MCA and PCoA from the right side were challenged against 5-HT, a significantly increased response was found only at the first three doses. On the other hand, the NE content of pools made of MCA, PCoA, and anterior cerebral artery from each side was reduced to the same level on both sides after ganglion removal. These results indicate that the excised superior cervical ganglion innervated the MCA and PCoA from both sides of the circle of Willis.

Occlusion of an “accessory” distal anterior cerebral artery during treatment of anterior communicating artery aneurysms

1991 ◽  
Vol 74 (1) ◽  
pp. 133-135 ◽  
Author(s):  
Kevin Gibbons ◽  
Leo N. Hopkins ◽  
Roberto C. Heros
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Communicating Artery ◽  
Case Histories ◽  
Content Type ◽  
Anterior Communicating Artery Aneurysms ◽  
Artery Segment ◽  
Distal Anterior Cerebral Artery ◽  
Clip Occlusion ◽  
Fine Print

✓ Two cases are presented in which clip occlusion of a third distal anterior cerebral artery segment occurred during treatment of anterior communicating artery aneurysms. Case histories, angiograms, operative descriptions, and postmortem findings are presented. The incidence of this anomalous vessel is reviewed. Preoperative and intraoperative vigilance in determining the presence of this anomaly prior to clip placement is emphasized.

Interoptic course of the anterior cerebral artery associated with anterior cerebral artery aneurysm

1982 ◽  
Vol 56 (2) ◽  
pp. 302-304 ◽  
Author(s):  
Howard J. Senter ◽  
Daniel J. Miller
Keyword(s):  
Carotid Artery ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Artery Aneurysm ◽  
Optic Nerves ◽  
Content Type ◽  
Anterior Cerebral Artery Aneurysm ◽  
Cerebral Artery Aneurysm ◽  
Fine Print

✓ A ruptured anterior cerebral artery aneurysm is reported in a patient in whom a solitary anterior cerebral artery arose from the proximal carotid artery and ascended between the optic nerves.

Saccular aneurysms of the distal anterior cerebral artery

1974 ◽  
Vol 40 (2) ◽  
pp. 218-223 ◽  
Author(s):  
M. Gazi Yaşargil ◽  
L. Philip Carter
Keyword(s):  
Cerebral Artery ◽  
Subarachnoid Space ◽  
Operative Mortality ◽  
Anterior Cerebral Artery ◽  
Operative Morbidity ◽  
Content Type ◽  
Interhemispheric Fissure ◽  
Distal Anterior Cerebral Artery ◽  
Fine Print ◽  
Saccular Aneurysms

✓ A series of 13 patients with saccular aneurysms of the distal anterior cerebral artery, operated on by the same surgeon with microtechniques, is reviewed. The incidence of aneurysms in this location was 3.4%, the median age of the patients 44 years, and the median time from most recent hemorrhage to surgery 13 days. There were five cases of multiple aneurysms. No operative mortality occurred; the operative morbidity was 15%. Because of their multiplicity, characteristic broad base, and the small subarachnoid space in the interhemispheric fissure, these aneurysms are judged technically difficult.

Intraoperative monitoring of blood flow insufficiency during surgery of middle cerebral artery aneurysms

2005 ◽  
Vol 103 (2) ◽  
pp. 275-283 ◽  
Author(s):  
Kazuomi Horiuchi ◽  
Kyouichi Suzuki ◽  
Tatsuya Sasaki ◽  
Masato Matsumoto ◽  
Jun Sakuma ◽  
...  
Keyword(s):  
Blood Flow ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Evoked Potential ◽  
Control Level ◽  
The Other ◽  
Somatosensory Evoked Potential ◽  
Content Type ◽  
Sep Monitoring ◽  
Fine Print

Object. The usefulness of motor evoked potential (MEP) monitoring to detect blood flow insufficiency (BFI) in the cortical branches of the middle cerebral artery (MCA) and lenticulostriate arteries (LSAs) during MCA aneurysm surgery was investigated based on the correlation between MEP and somatosensory evoked potential (SEP) monitoring. Methods. Fifty-three patients with MCA aneurysms underwent surgery accompanied by intraoperative MEP and SEP monitoring. There was no postoperative motor paresis in 43 patients in whom MEP and SEP results remained unchanged. In the other 10 patients, nine manifested transient MEP changes; in five of these, SEP changes did not occur. The transient MEP changes were thought to be attributable to BFI of the MCA cortical branches in two patients, the LSA in three, and either the MCA branches or the LSA in four patients. Of these nine patients, six did not present with postoperative motor paresis; transient motor paresis was recognized in the other three. In the 10th patient, MEP waves disappeared and did not recover. This patient's SEPs remained at 70% of the control level, and he developed severe hemiparesis. A postoperative computerized tomography scan revealed a new low-density area in the corona radiata and putamen. Conclusions. Blood flow insufficiency in both the LSA and MCA cortical branches that perfuse the corticospinal tract can be detected by intraoperative MEP monitoring. Somatosensory evoked potential monitoring is not reliable enough to detect BFI in the MCA branches and the LSAs.

Optic nerve apoplexy

1986 ◽  
Vol 64 (2) ◽  
pp. 313-316 ◽  
Author(s):  
Peter L. Reilly ◽  
Peter E. Oatey
Keyword(s):  
Optic Nerve ◽  
Arteriovenous Malformation ◽  
Visual Function ◽  
The Other ◽  
Content Type ◽  
Loss Of Vision ◽  
Surgical Evacuation ◽  
Subfrontal Approach ◽  
Fine Print

✓ Two patients who suffered loss of vision due to spontaneous optic nerve hematomas are described. The hemorrhage was contained within the pial confines of the involved optic nerve, although there was some extension more posteriorly. The diagnosis of an intraneural cryptic arteriovenous malformation was histologically confirmed in one case and was supported by evidence in the other. Surgical evacuation by the subfrontal approach was undertaken and visual function improved.

Acute hemorrhage into pituitary adenoma with SAH and anterior cerebral artery occlusion

1983 ◽  
Vol 58 (5) ◽  
pp. 771-773 ◽  
Author(s):  
Henryk Majchrzak ◽  
Tadeusz Wencel ◽  
Tadeusz Dragan ◽  
Joanna Bialas
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Artery Occlusion ◽  
Loss Of Consciousness ◽  
Artery Blood Flow ◽  
Acute Hemorrhage ◽  
Content Type ◽  
The Right ◽  
Cerebral Artery Occlusion ◽  
Fine Print

✓ The authors present the case of a patient with a pituitary tumor, who manifested signs of subarachnoid hemorrhage (SHA) and loss of consciousness. After he had regained consciousness, massive left-sided paralysis was noted. Angiography and computerized tomography showed hemorrhage into the tumor, SAH, and ischemia of the right frontal lobe as a result of occlusion of the anterior cerebral artery. Removal of the tumor 3 weeks after the SAH did not lead to resumption of the anterior cerebral artery blood flow.

End-to-end anastomosis of the anterior cerebral artery after excision of a giant aneurysm

1982 ◽  
Vol 56 (4) ◽  
pp. 577-580 ◽  
Author(s):  
Robert R. Smith ◽  
Andrew D. Parent
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Giant Aneurysm ◽  
Fusiform Aneurysm ◽  
Content Type ◽  
Intracranial Arteries ◽  
End To End ◽  
Fine Print

✓ A case of a giant anterior cerebral artery fusiform aneurysm is presented. The lesion was treated by primary excision of the involved segment with an end-to-end anastomosis of the proximal-distal segments of the anterior cerebral artery. It is believed that this technique has not been reported previously for lesions involving major intracranial arteries.

Ligation of an anterior cerebral artery for aneurysms of the anterior communicating artery complex

1973 ◽  
Vol 38 (4) ◽  
pp. 481-487 ◽  
Author(s):  
Michael Scott
Keyword(s):  
Clinical Data ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Communicating Artery ◽  
Content Type ◽  
Long Term Follow Up ◽  
Fine Print

✓ The clinical data on nine patients with aneurysms of the anterior communicating artery complex treated by ligation of an anterior cerebral artery are presented. The long-term follow-up angiograms on five of the eight patients who survived surgery are discussed.

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