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Interventional Neuroradiology

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https://www.readbyqxmd.com/read/28304208/issues-with-vertebral-artery-dissections
#1
Marc A Bronson, Stephen M Perle, Peter Tuchin
No abstract text is available yet for this article.
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304207/dural-venous-sinus-stenting-for-medically-and-surgically-refractory-idiopathic-intracranial-hypertension
#2
Sudhakar R Satti, Lakshmi Leishangthem, Alejandro Spiotta, M Imran Chaudry
Background Idiopathic intracranial hypertension (IIH) is a syndrome defined by elevated intracranial hypertension without radiographic evidence of a mass lesion in the brain. Dural venous sinus stenosis has been increasingly recognized as a treatable cause, and dural venous sinus stenting (DVSS) is increasingly performed. Methods A 5 year single-center retrospective analysis of consecutive patients undergoing DVSS for medically refractory IIH. Results There were 43 patients with a mean imaging follow-up of 6...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304206/restenosis-after-stenting-in-symptomatic-vertebral-arterial-orifice-disease-and-considerations-for-better-outcome
#3
Jun Young Chang, Hyun Park, Oki Kwon, Moon-Ku Han
We have performed stenting in 11 patients with symptomatic vertebral arterial orifice stenosis refractory to medical treatment or impairment in anterior circulation. Three of the 11 patients experienced asymptomatic severe in-stent restenosis or occlusion. Bare metal stents were used in those three patients, two of whom received revascularization therapy. Development of sufficient cervical collateral channels reconstituting the distal vertebral artery was the common feature in patients with asymptomatic in-stent restenosis...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304205/stenting-of-the-cervical-internal-carotid-artery-in-acute-stroke-management-the-karolinska-experience
#4
Anastasios Mpotsaris, Christoph Kabbasch, Jan Borggrefe, Vamsi Gontu, Michael Soderman
Background Emergency stent placement in the extracranial internal carotid artery in combination with anterior circulation thrombectomy is a routine procedure. Yet, precise indications and clinical safety in this setting remains controversial. Present data for mechanical thrombectomy include few studies with acute stenting of tandem occlusions. We evaluated the feasibility, safety and clinical outcome of this endovascular treatment in a retrospective analysis of all consecutive cases at a comprehensive stroke centre...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304204/changes-in-contrast-transit-times-on-digital-subtraction-angiography-post-pipeline-embolization-device-deployment
#5
Ahmed E Hussein, Andreas Linninger, Sophia F Shakur, Fady T Charbel, Chih-Yang Hsu, Fady T Charbel, Ali Alaraj
It is postulated that hemodynamic changes occur in the distal vascular bed post-deployment of Pipeline Embolization Devices (PEDs). In this paper, we evaluate changes in the contrast transit times (TTs) on digital subtraction angiography (DSA) post-PED interventions. DSA films were analyzed using custom-made software for the time-density relationship at baseline and compared to post-PED deployment. All analyses were performed within the middle cerebral artery (MCA) M1 segment. Analyses included TT10%-100% (time needed for the contrast to change from 10% image intensity to 100%), TT100%-10%, and TT25%-25%...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304203/manual-aspiration-thrombectomy-using-a-penumbra-catheter-in-patients-with-acute-migrated-mca-occlusion
#6
Sung Hyun Baik, Hyo Sung Kwak, Seung Bae Hwang, Gyung Ho Chung
Background We retrospectively assessed the efficacy and safety of manual aspiration thrombectomy (MAT) using a Penumbra catheter in patients with acute migrated middle cerebral artery (MCA) occlusion. Methods We conducted a retrospective review of patients who underwent MAT using Penumbra 4 or 5 MAX reperfusion catheters for the treatment of acute MCA occlusion between January 2012 and December 2015. A migrated thrombus was defined as distal migration greater than ≥1 cm on initial cerebral angiography compared with preprocedural angiographic findings...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304201/evaluation-of-the-characteristics-of-various-types-of-finishing-coils-for-the-embolization-of-intracranial-aneurysms-in-an-experimental-model-with-radiolucent-coils
#7
Keisuke Ota, Noriaki Matsubara, Shigeru Miyachi, Takashi Izumi, Masashi Ito, Takumi Asai, Takashi Yamanouchi, Toshihiko Wakabayashi
In endovascular coil embolization of intracranial aneurysms, very soft coils, often called "finishing coils," are usually selected in the final stage of coil embolization. The authors developed a radiolucent coil made of thin nylon thread to evaluate the performance of coils under a situation simulating the course of embolization. The characteristics of various types of finishing coils were investigated using radiolucent coils. Experimental embolization was performed with a silicone aneurysm filled with radiolucent coils simulating the final stage of embolization...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304200/advance-an-effective-and-feasible-technique-in-acute-stroke-treatment
#8
Erdem Gurkas, Cetin Kursad Akpinar, Emrah Aytac
Background and purpose Different techniques regarding efficient utilization of thrombectomy devices have been reported. Here, we described a novel technique named ADVANCE that is based on advancing a distal access catheter over the stent retriever. In this study, we aimed to report our initial results with this novel thrombectomy technique. Methods and results Sixty-seven consecutive acute anterior circulation ischemic stroke patients (35 male, 32 female) between January 2015 and January 2016 who were treated by mechanical thrombectomy were included in this prospective study...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304199/jailed-double-microcatheter-technique-following-horizontal-stenting-for-coil-embolization-of-intracranial-wide-necked-bifurcation-aneurysms-a-technical-report-of-two-cases
#9
Takahiro Kitahara, Taketo Hatano, Makoto Hayase, Etsuko Hattori, Akinori Miyakoshi, Takehiko Nakamura
The horizontal stenting technique facilitates endovascular treatment of wide-necked bifurcation intracranial aneurysms. Previous literature shows, however, that subsequent coil embolization at initial treatment results in incomplete obliteration in many cases. The authors present two consecutive cases of wide-necked large bifurcation aneurysms to describe an additional coil embolization technique following horizontal stenting. The patients were a 53-year-old female with an unruptured internal carotid artery terminus aneurysm and a 57-year-old female with a recurrent basilar artery tip aneurysm...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304198/extracranial-vertebral-artery-rupture-likely-secondary-to-cupping-therapy-superimposed-on-spontaneous-dissection
#10
Jae Young Choi, Jae Il Lee
No abstract text is available yet for this article.
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28304197/endovascular-treatment-of-a-dural-arteriovenous-fistula-in-a-patient-with-loeys-dietz-syndrome-a-case-report
#11
Rie Aoki, Kittipong Srivatanakul, Takahiro Osada, Kazuko Hotta, Takatoshi Sorimachi, Mitsunori Matsumae, Hiroko Morisaki
Background Loeys-Dietz syndrome (LDS) is a recently recognized autosomal dominant connective tissue disease. The manifestations of LDS include vascular tortuosity, scoliosis, craniosynostosis, aneurysm and aortic dissections. Clinical presentation A 35-year-old woman treated with Stanford type B aortic dissection and breast cancer was referred to us for Borden type II dural arteriovenous fistula (dAVF) draining to the vein of Galen, involving the midline of tentorium cerebelli. The dAVF was treated successfully by combined transarterial and transvenous embolization...
April 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27941133/letter-regarding-absence-of-skin-discoloration-after-transarterial-embolization-of-a-subcutaneous-auricular-arteriovenous-malformation-with-phil
#12
Rob Greene
No abstract text is available yet for this article.
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27913801/the-pressure-reduction-coefficient-a-new-parameter-to-assess-aneurysmal-blood-stasis-induced-by-flow-diverters-disruptors
#13
Gregory Gascou, Riccardo Ferrara, Dominique Ambard, Mathieu Sanchez, Kyriakos Lobotesis, Franck Jourdan, Vincent Costalat
Background and purpose Pore density (PD), surface metal coverage (SMC) and the number of wires are all different parameters which can influence the efficacy of a flow disruptor/diverter. Nevertheless, the relative importance of a parameter to induce intra-aneurysmal blood stasis is still poorly evaluated. Therefore, comparison between devices based on a unique value is not reliable. The aim of this study was to propose a new bench top parameter (the pressure reduction coefficient (PRC; ξ)) in order to assess the global haemodynamic effect of each flow diverter/disruptor to slow flow...
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27895243/contrast-less-stent-placement-for-vertebral-artery-origin-stenosis
#14
Shinzo Ota, Yoshinobu Sekihara, Takahiro Himeno, Yasue Tanaka, Tatsuya Ohtonari
We performed stent placement under intravascular ultrasound (IVUS), without the use of contrast medium, in a male patient in his 70s who had vertebral artery origin stenosis and decreased renal function. Satisfactory dilatation was achieved without complications, and the patient remained asymptomatic at 2 years of follow-up. We now report the details of this procedure. Stent placement under IVUS guidance may be useful in patients in whom contrast medium is contraindicated.
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27895242/availability-of-endovascular-therapies-for-cerebrovascular-disease-at-primary-stroke-centers
#15
Mark J Alberts, Jean Range, William Spencer, Vicki Cantwell, M J Hampel
Background Endovascular therapies (EVTs) are useful for treating cerebrovascular disease. There are few data about the availability of such services at primary stroke centers (PSCs). Our hypothesis was that some of these services may be available at some PSCs. Methods We conducted an internet-based survey of hospitals certified as PSCs by the Joint Commission. The survey inquired about EVTs such as intra-arterial (IA) lytics, IA mechanical clot removal, coiling of aneurysms, and cervical arterial stenting, physician training, coverage models, hospital type, and outcomes...
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27895241/secular-pattern-of-aneurismal-rupture-with-the-lunar-cycle-and-season
#16
Jillian C Banfield, Mohamed Abdolell, Jai S Shankar
Background The lunar cycle and seasons may be associated with rates of rupture of intracranial aneurysms, but the literature is mixed. Studies of the association between the lunar cycle and rates of aneurysm rupture used the eight qualitative moon phases. The purpose of this study was to assess any association of aneurysm rupture with the lunar cycle and with the season. Materials and methods We retrospectively reviewed all cases of subarachnoid haemorrhage secondary to ruptured intracranial aneurysm treated with endovascular coiling in our institution over a 10-year period...
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27837112/endovascular-treatment-of-vein-of-galen-aneurysmal-malformation-using-rapid-ventricular-pacing-a-case-report
#17
Birgitta Ramgren, Olof Rask, Jan Gelberg, Petru Liuba, Per Undrén, Johan Wassélius
The treatment of choice of vein of Galen aneurysmal malformation (VGAM) involves endovascular procedures that can be difficult to perform in high-flow fistulas. We describe the use of rapid ventricular pacing (RVP), a well-known cardiologic technique, to safely treat a high-flow fistula in an infant with VGAM.
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27815339/should-future-interventional-neuroradiologists-be-screened-for-mutations-that-impair-radiation-induced-dna-repair
#18
Kieran Murphy, Adam Thakore, Marie Constance Lacasse, Danyal Z Khan
In our current medical practice, an increasing number of specialists now have access to radiology technical platforms in order to perform imaging-guided procedures. Although knowledge about the current guidelines and radiation protection devices is a pre-requisite for the use of radiation, the preventive measures are often more or less strictly followed, leading to chronic daily exposure to significant doses of radiation and large accumulated lifetime exposures. Aortic intervention, electrophysiology, and neuro intervention in particular can result in large doses to the operators...
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27798328/cerebral-venous-sinuses-thrombosis-in-both-transverse-sinus-and-torcula-multistep-endovascular-treatment-and-stenting
#19
G Cabral de Andrade, A Lesczynsky, V M Clímaco, E R Pereira, P O Marcelino, Aoc Franco, D F De Almeida
Purpose Cerebral venous sinus thrombosis (CVST) is an unusual and potentially life-threatening condition with variable and nonspecific clinical symptoms and high morbimortality rates. Standard therapy consists of systemic anticoagulation; although there is no clear evidence about the best choice for treatment, intravenous heparin is used as the first-line treatment modality. Intravenous sinus thrombolysis can be an effective and relatively safe treatment for acutely deteriorating patients who have not responded to conventional therapy...
February 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27798327/effects-on-vessel-measurement-accuracy-and-subsequent-occlusion-after-calcium-channel-blocker-infusion-during-treatment-of-cerebral-aneurysms-with-the-pipeline-embolization-device
#20
M D Alexander, A D Nicholson, R J Darflinger, F Settecase, D L Cooke, C F Dowd, M R Amans, R T Higashida, S W Hetts, V V Halbach
Introduction/Purpose To achieve aneurysm occlusion, flow diverters (FDs) must be accurately sized to maximize coverage over the neck and induce thrombosis. Catheterization for diagnostic angiography can cause vasospasm that may affect vessel measurements. This study evaluates impacts of intra-arterial infusion of a calcium channel blocker (CCB) on angiographic measurements in patients treated with FDs to determine effects on final diameter of the FD and subsequent occlusion. Materials and methods Pre-treatment measurements were recorded for diameter of the distal and proximal landing zones and maximum and minimum diameters between these segments...
February 2017: Interventional Neuroradiology
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