scholarly journals Progressive cervicocranial arteriopathy with dilatations and stenoses: case report

2004 ◽  
Vol 62 (3b) ◽  
pp. 899-902 ◽  
Author(s):  
Adriana Bastos Conforto ◽  
Paulo Puglia Jr ◽  
Fábio Iuji Yamamoto ◽  
Milberto Scaff
Keyword(s):  
Vertebral Artery ◽  
Carotid Arteries ◽  
Fibromuscular Dysplasia ◽  
Internal Carotid ◽  
Left Vertebral Artery ◽  
Fusiform Aneurysm ◽  
Pathogenetic Mechanism ◽  
Pontine Infarction ◽  
The Right ◽  
Internal Carotid Arteries

We report the case of a 36 year-old woman who presented occlusion of a basilar artery fusiform aneurysm (FA) associated with pontine infarction, and two episodes of subarachnoid hemorrhage possibly due to arterial dissection. She also had asymptomatic FAs in the right middle cerebral and left internal carotid arteries. Over 5 years, lesions suggestive of fibromuscular dysplasia in the right vertebral artery and occlusion of the left vertebral artery were observed. This combination of lesions emphasizes the possibility of a common pathogenetic mechanism causing different degrees of media disruption in cervicocranial arteries.

scholarly journals Bilateral aberrant internal carotid arteries discovered during myringotomy: A case report and review of the literature

2018 ◽  
Vol 4 (1) ◽  
pp. 23
Author(s):  
Marc Antoine Hudon ◽  
Margaret Aron ◽  
Mireille Gervais
Keyword(s):  
Hearing Loss ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Conductive Hearing Loss ◽  
Otitis Media With Effusion ◽  
Vascular Anomaly ◽  
Review Of The Literature ◽  
The Right ◽  
Conductive Hearing ◽  
Internal Carotid Arteries

The aberrant course of the intratympanic carotid artery is a rare congenital vascular anomaly. We report the case of a 7-year-old patient who presented with bilateral conductive hearing loss, originally attributed to otitis media with effusion. After myringotomy, massive pulsatile bleeding occurred on the right side. The bleeding was successfully controlled with packing without any residual complication. Imaging confirmed aberrant internal carotid arteries abutting the tympanic membranes bilaterally.

Cerebral mycotic aneurysm of fungal origin

1978 ◽  
Vol 49 (1) ◽  
pp. 0107-0110 ◽  
Author(s):  
Gulshan K. Ahuja ◽  
Neeraj Jain ◽  
Malini Vijayaraghavan ◽  
Subimal Roy
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Mycotic Aneurysm ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Content Type ◽  
History Of ◽  
The Right ◽  
Internal Carotid Arteries ◽  
Fine Print

✓ A young man who had a long history of sinusitis developed subarachnoid hemorrhage and died. Autopsy showed a mycotic aneurysm of fungal origin at the junction of the right posterior cerebral and internal carotid arteries. Four of five reported cases of fungal aneurysm were due to Aspergillus infection.

Etiology of cerebral vasospasm in primates

1991 ◽  
Vol 75 (3) ◽  
pp. 415-424 ◽  
Author(s):  
R. Loch Macdonald ◽  
Bryce K. A. Weir ◽  
Tim D. Runzer ◽  
Michael G. A. Grace ◽  
J. Max Findlay ◽  
...  
Keyword(s):  
Cerebral Vasospasm ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Autologous Blood ◽  
Supernatant Fluid ◽  
Primate Model ◽  
Content Type ◽  
The Right ◽  
Internal Carotid Arteries ◽  
Angiographic Findings

✓ A primate model was used to determine whether oxyhemoglobin (OxyHb), methemoglobin (MetHb), or bilirubin is likely to be responsible for cerebral vasospasm following subarachnoid hemorrhage (SAH). Forty cynomolgus monkeys were randomly assigned to one of five groups. On Day 0, each animal underwent angiography followed by right craniectomy and placement of an Ommaya reservoir with its catheter adjacent to the right middle cerebral artery (MCA). The animals received intrathecal injections twice a day for 6 days of one of the following solutions: mock cerebrospinal fluid (CSF); OxyHb; MetHb; bilirubin; or supernatant fluid from an incubated mixture of autologous blood and mock CSF. On Day 7, angiography was repeated and the animals were killed. Comparison of angiograms obtained on Day 0 and Day 7 of the experiment showed significant vasospasm of the right MCA and the right anterior cerebral and internal carotid arteries in the animal groups that had received OxyHb or supernatant fluid. There was a smaller reduction in diameter of the same vessels in the bilirubin group (not statistically significant), while no effects were observed in the groups receiving MetHb or mock CSF. Electron microscopy of the right MCA's gave results consistent with the angiographic findings. One monkey in the OxyHb group developed a delayed-onset right MCA infarction. These data suggest that OxyHb is the cause of cerebral vasospasm following SAH.

scholarly journals Tortuous internal carotid artery presenting as a pharyngeal mass

2010 ◽  
Vol 124 (9) ◽  
pp. 1033-1036 ◽  
Author(s):  
S Hosokawa ◽  
H Mineta
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Surgical Procedures ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Factors Affecting ◽  
The Right ◽  
Internal Carotid Arteries ◽  
Fatal Haemorrhage ◽  
Radiological Examinations

AbstractBackground:Deformities of the carotid artery are rare. Tortuosity, kinking and coiling of the internal carotid artery may be observed with advancing age. A tortuous internal carotid artery may cause an abnormal sensation in the throat. In the early twentieth century, there were several reported cases of fatal haemorrhage during pharyngeal surgical procedures, because this condition went undetected.Method and results:We present two cases of tortuosity of the right internal carotid artery. Both women complained of abnormal throat sensations. Endoscopic studies and radiological examinations revealed tortuous right internal carotid arteries presenting as pulsatile masses. A literature review revealed that, in most reported cases, this deformity occurred on the right side. We believe that the defect and its right-sided predominance can be attributed to anatomical influences and factors affecting blood pressure.Conclusion:In most reported cases of tortuous internal carotid artery, the defect occurred on the right side and patients complained of an abnormal sensation in the throat. This information is useful in the diagnosis of this condition. It is important for otolaryngologists to recognise this anomaly, because fatal haemorrhage can occur in patients with this condition during surgical procedures on the pharynx.

scholarly journals Transradial access for diagnostic angiography and interventional neuroradiology procedures: A four-year single-center experience

2020 ◽  
Vol 26 (4) ◽  
pp. 506-513
Author(s):  
Roger Barranco Pons ◽  
Isabel Rodríguez Caamaño ◽  
Oscar Sabino Chirife ◽  
Lucía Aja ◽  
Sonia Aixut ◽  
...  
Keyword(s):  
Vertebral Artery ◽  
Interventional Procedures ◽  
Internal Carotid ◽  
Interventional Neuroradiology ◽  
Left Vertebral Artery ◽  
Single Center ◽  
Single Center Experience ◽  
Transradial Access ◽  
Diagnostic Angiography ◽  
The Right

Purpose The objective of this study was to assess the efficacy and safety of transradial access for diagnostic angiography and interventional neuroradiology procedures. Methods This was a retrospective analysis of a single-center experience based on 225 patients attended between August 2015 and October 2019, in which transradial access was used for diagnostic angiography and endovascular interventions. Ultrasound-guided access was done at the level of the forearm or anatomical or snuffbox (distal transradial access). Conventional forearm transradial access was done in 179 procedures (right, left and bilateral in 169, 5 and 5, respectively), while distal transradial access was done in 46 cases (41 right and 5 left). Primary outcome measures included successful catheterization, need to change access, or technical complications. Results In the group of 131 diagnostic angiographies, the technique success rate was 100% to target the right vertebral artery, 97% for the right internal carotid, 93.5% for the left internal carotid, 82% for the left vertebral artery, and 100% for both common and external carotid arteries. All patients were discharged within 2–4 h after the procedure. A total of 94 interventional procedures were performed, including aneurysms in 39 cases, stroke in 34, and other procedures (carotid stents, arteriovenous malformations, carotid-cavernous fistula) in the remaining 21. The overall technical success in both diagnostic angiographies and interventional procedures was 97.7%. In four cases of diagnostic angiography and in 1 intervention, it was necessary to switch from transradial access to transfemoral access. Three cases of hematoma related to the access site were recorded. Conclusions In our experience, transradial access is an alternative approach for diagnostic angiography and neuro-interventions.

Existence of two types of postjunctional α-adrenoceptors in the isolated canine internal carotid artery

1988 ◽  
Vol 66 (5) ◽  
pp. 655-659 ◽  
Author(s):  
Yasuaki Kawai ◽  
Shigeaki Kobayashi ◽  
Toshio Ohhashi
Keyword(s):  
Response Curve ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
The Other ◽  
Low Concentrations ◽  
Selective Agonists ◽  
High Concentrations ◽  
The Right ◽  
Internal Carotid Arteries ◽  
Concentration Response Curve

The pharmacological characteristics of postjunctional α-adrenoceptors in isolated canine internal carotid arteries were investigated by the use of selective agonists and antagonists for α1 and α2-adrenoceptors. Norepinephrine, phenylephrine, and xylazine caused concentration-dependent contractions in the helical strips. The contraction induced by 10−4 M xylazine was significantly smaller than that produced by 10−4 M norepinephrine or 10−4 M phenylephrine. The contraction induced by 10−4 M phenylephrine was almost the same value as that induced by 10−4 M norepinephrine. Phentolamine (10−8 and 10−7 M) caused a parallel shift to the right of the concentration–response curve to norepinephrine. The contractile responses to low concentrations of norepinephrine were significantly suppressed by pretreatment with an α2-antagonist such as yohimbine (10−9 and 10−8 M) or DG 5128(10−7 and 10−6 M). On the other hand, the responses to higher concentrations of norepinephrine were mainly reduced by low concentrations of an α1-antagonist, prazosin (3 × 10−10 and 3 × 10−9 M). These results suggest that both α1- and α2-adrenoceptors are located on the plasma membrane of smooth muscle cells in canine internal carotid arteries and that the norepinephrine-induced contractions at low and high concentrations are mainly mediated by activation of α2- and α1-adrenoceptors, respectively.

scholarly journals A New Model of Transient Cerebral Ischemia in Neonatal Rats

1996 ◽  
Vol 16 (2) ◽  
pp. 237-243 ◽  
Author(s):  
Nobuto Mitsufuji ◽  
Hiroshi Yoshioka ◽  
Sozo Okano ◽  
Tetsuo Nishiki ◽  
Tadashi Sawada
Keyword(s):  
Cerebral Ischemia ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Spectroscopic Studies ◽  
Transient Cerebral Ischemia ◽  
Intracellular Acidosis ◽  
New Model ◽  
Ph Level ◽  
The Right ◽  
Internal Carotid Arteries

A new model of transient cerebral ischemia in 10-day-old rats is described. Under microscopic guidance, the right external and internal carotid arteries were electrically coagulated. A solid 0.47 mm diameter nylon thread was inserted into the right common carotid artery toward the ascending aorta up to 10–12 mm from the upper edge of the sternomastoid muscle (preischemic rats). A 60-min cerebral ischemia was induced by clamping the left external and internal carotid arteries (ischemic rats), followed by 3-h recirculation. 31P magnetic resonance (MRS) spectroscopic studies revealed that severe intracellular acidosis occurred and ATP disappeared completely for at least the last 20 min of ischemia. Cerebral blood flow (CBF), measured by the hydrogen clearance technique, decreased to ∼11% of the preischemic level in the frontal cortex soon after the induction of ischemia. On resuscitation, ATP recovered completely and the preischemic intracellular pH level was restored within 180 min. CBF had recovered to ∼30% of the preischemic level at 5 min after resuscitation. The CBF recovery was not complete even at 180 min after resuscitation. With this model, the effects of pure ischemia without hypoxia on the neonatal brain and the process of recovery from transient ischemia can be studied.

Carotid and Vertebral Stenting: Preliminary Report

1997 ◽  
Vol 3 (2_suppl) ◽  
pp. 59-61 ◽  
Author(s):  
T. Mori ◽  
K. Kazita ◽  
M. Fukuoka ◽  
K. Mori
Keyword(s):  
Vertebral Artery ◽  
Balloon Angioplasty ◽  
Preliminary Report ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Initial Experience ◽  
Ostial Lesion ◽  
Internal Carotid Arteries

We report our initial experience of carotid and vertebral stenting. Three haemodynamically significant extra-cranial lesions (% diameter stenosis >70) in 3 clinically symptomatic patients were treated by stenting between March 1996 and September 1996. Two lesions of the internal carotid arteries were ostial and in one case a subtotal stenosis and ostial lesion of the vertebral artery were observed. All lesions looked more widely and smoothly dilated by stenting than by ordinary standard balloon angioplasty.

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