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Cerebrovascular anatomy

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https://www.readbyqxmd.com/read/28919562/operative-management-of-distal-anterior-cerebral-artery-aneurysms-through-a-mini-anterior-interhemispheric-approach
#1
Alejandro Monroy, Edgar Nathal, Albert L Rhoton
BACKGROUND: Distal anterior cerebral artery (DACA) aneurysms, also referred to as pericallosal artery aneurysms, are present in 1.5 to 9% of all intracranial aneurysms. This study aims to describe the importance of the microsurgical anatomy of the DACA and demonstrate the surgical nuances for handling DACA aneurysms, with a minimally invasive surgical technique METHODS: We retrospectively and descriptively analyzed a series of aneurysm cases performed at the National Institute of Neurology and Neurosurgery-Mexico City...
September 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28885502/outcomes-of-endovascular-repair-for-abdominal-aortic-aneurysms-a-nationwide-survey-in-japan
#2
Katsuyuki Hoshina, Shin Ishimaru, Yusuke Sasabuchi, Hideo Yasunaga, Kimihiro Komori
OBJECTIVE: To analyze data on patients treated with a bifurcated stent graft for abdominal aortic aneurysm (AAA). BACKGROUND: The Japan Committee for Stentgraft Management (JACSM) was established in 2007 to manage the safety of endovascular aortic aneurysm repair (EVAR) in Japan. The JACSM registry includes detailed anatomical and clinical data of all patients who undergo stent graft insertion in Japan. METHODS: Among 51,380 patients treated with bifurcated stent graft for AAA, we identified 38,008 eligible patients (excluding those with rupture or insufficient data)...
September 6, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28866349/individual-differences-in-regional-cortical-volumes-across-the-life-span-are-associated-with-regional-optical-measures-of-arterial-elasticity
#3
Antonio M Chiarelli, Mark A Fletcher, Chin Hong Tan, Kathy A Low, Edward L Maclin, Benjamin Zimmerman, Tania Kong, Alexander Gorsuch, Gabriele Gratton, Monica Fabiani
Aging is often accompanied by changes in brain anatomy and cerebrovascular health. However, the specific relationship between declines in regional cortical volumes and loss of cerebral arterial elasticity is less clear, as only global or very localized estimates of cerebrovascular health have been available. Here we employed a novel tomographic optical method (pulse-DOT) to derive local estimates of cerebral arterial elasticity and compared regional volumetric estimates (obtained with FreeSurfer) with optical arterial elasticity estimates from the same regions in 47 healthy adults (aged 18-75)...
September 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28844469/a-systematic-review-of-primary-endovascular-repair-of-the-ascending-aorta
#4
REVIEW
Corbin E Muetterties, Rohan Menon, Grayson H Wheatley
OBJECTIVE: Endovascular repair of the ascending aorta is currently limited to patients at high surgical risk with aortic diseases originating above the sinotubular junction. A number of different endovascular technologies and approaches have been used, although no consensus exists regarding a standardized technique. To better understand real-world endovascular approaches to the ascending aorta, we performed a comprehensive review of the types of endovascular aortic stents and associated vascular access used in repair of the ascending aorta...
August 22, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28838108/the-infrazygomatic-segment-of-the-superficial-temporal-artery-anatomy-and-technique-for-harvesting-a-better-interposition-graft
#5
Ali Tayebi Meybodi, Michael T Lawton, Ivan El-Sayed, Jason Davies, Halima Tabani, Xuequan Feng, Arnau Benet
BACKGROUND: The superficial temporal artery (STA) is underutilized as an interposition graft because current techniques expose and harvest STA above the level of the zygoma. This technique yields a diminutive arterial segment in both length and diameter, which limits its use for extracranial-intracranial bypass. OBJECTIVE: To introduce a safe and efficient technique for harvesting of the infrazygomatic segment of the STA. METHODS: Scalp layers, STA, and the facial nerve were studied in 18 specimens...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28748256/bioresorbable-vascular-scaffolds-in-interventional-neuroradiology
#6
Anil Arat, Ergun Daglioglu, Ilkay Akmangit, Ahmet Peker, Murat Arsava, Mehmet Akif Topcuoglu, Deniz Belen
PURPOSE: Bioresorbable vascular scaffolds (BVS) have changed practice patterns in cardiology. These resorbable stents have not yet been utilized in the cerebrovascular circulation. We report the initial experiences with these devices in interventional neuroradiology. METHODS: A retrospective review of clinical presentations, imaging findings and follow-up results of all patients treated using a BVS by our neurovascular team was carried out using hospital electronic charts and the hospital radiographic archive system...
July 26, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28707575/bayes-syndrome-and-imaging-techniques
#7
Ivan Hernandez Betancor, Maria Manuela Izquierdo-Gomez, Javier Garcia Niebla, Ignacio Laynez-Cerdeña, Martin Jesus Garcia-Gonzalez, Antonio Barragan-Acea, Jose Luis Iribarren-Sarriá, Juan Jose Jimenez-Rivera, Juan Lacalzada-Almeida
Interatrial block (IAB) is due to disruption in the Bachmann region (BR). According to whether interatrial electrical conduction is delayed or completely blocked through the BR, it can be classified as IAB of first, second or third degree. On the surface electrocardiogram, a P wave ≥ 120 ms (partial IAB) is observed or associated to the prolongation of the P wave with a biphasic (positive / negative) morphology in the inferior leads (advanced IAB). Bayes syndrome is defined as an advanced IAB associated with atrial arrhythmia, more specifically atrial fibrillation...
July 13, 2017: Current Cardiology Reviews
https://www.readbyqxmd.com/read/28706116/training-standards-in-neuroendovascular-surgery-program-accreditation-and-practitioner-certification
#8
REVIEW
Arthur L Day, Adnan H Siddiqui, Philip M Meyers, Tudor G Jovin, Colin P Derdeyn, Brian L Hoh, Howard Riina, Italo Linfante, Osama Zaidat, Aquilla Turk, Jay U Howington, J Mocco, Andrew J Ringer, Erol Veznedaroglu, Alexander A Khalessi, Elad I Levy, Henry Woo, Robert Harbaugh, Steven Giannotta
BACKGROUND AND PURPOSE: Neuroendovascular surgery is a medical subspecialty that uses minimally invasive catheter-based technology and radiological imaging to diagnose and treat diseases of the central nervous system, head, neck, spine, and their vasculature. To perform these procedures, the practitioner needs an extensive knowledge of the anatomy of the nervous system, vasculature, and pathological conditions that affect their physiology. A working knowledge of radiation biology and safety is essential...
August 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28585295/bioinspired-collagen-scaffolds-in-cranial-bone-regeneration-from-bedside-to-bench
#9
REVIEW
Justine C Lee, Elizabeth J Volpicelli
Calvarial defects are common reconstructive dilemmas secondary to a variety of etiologies including traumatic brain injury, cerebrovascular disease, oncologic resection, and congenital anomalies. Reconstruction of the calvarium is generally undertaken for the purposes of cerebral protection, contour restoration for psychosocial well-being, and normalization of neurological dysfunction frequently found in patients with massive cranial defects. Current methods for reconstruction using autologous grafts, allogeneic grafts, or alloplastic materials have significant drawbacks that are unique to each material...
September 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28574040/-use-of-a-filtering-protective-device-during-angioplasty-and-stenting-of-the-brachiocephalic-trunk
#10
V N Tsygankov, A M Frantsevich
The authors carried out a pilot study aimed at assessing the possibility and efficacy of using filtering systems for protection of cerebral arteries from distal embolism during angioplasty and stenting of the brachiocephalic trunk. A total of five patients presenting with lesions of the brachiocephalic trunk underwent 5 roentgenoendovascular interventions with the use of the filtering protective device Spider FX. Angiographic and clinical success was achieved in 100% of cases. Particles of debris were obtained from the protective device in all cases...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/28541130/measuring-functional-connectivity-in-stroke-approaches-and-considerations
#11
Joshua S Siegel, Gordon L Shulman, Maurizio Corbetta
Recent research has demonstrated the importance of global changes to the functional organization of brain network following stroke. Resting functional magnetic resonance imaging (R-fMRI) is a non-invasive tool that enables the measurement of functional connectivity (FC) across the entire brain while placing minimal demands on the subject. For these reasons, it is a uniquely appealing tool for studying the distant effects of stroke. However, R-fMRI studies rely on a number of premises that cannot be assumed without careful validation in the context of stroke...
August 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28535731/transcervical-carotid-stent-placement-in-the-setting-of-a-hostile-neck-and-a-type-iii-aortic-arch
#12
Lauren A Huntress, Naiem Nassiri, Randy Shafritz, Saum A Rahimi
Previous radical neck dissection and neck irradiation pose considerable operative risks in patients requiring carotid endarterectomy for symptomatic carotid disease. Carotid stenting is an acceptable alternative for these patients but carries a higher risk of cerebrovascular accidents especially in patients with type III aortic arch anatomy. Herein, we present a technically challenging case of a patient with an irradiated neck and a history of radical neck dissection who presented with a symptomatic high-grade left internal carotid artery stenosis in the setting of a type III aortic arch...
July 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28523471/quantification-of-left-atrial-volume-and-phasic-function-using-cardiovascular-magnetic-resonance-imaging-comparison-of-biplane-area-length-method-and-simpson-s-method
#13
Laura Kristin Wandelt, Johannes Tammo Kowallick, Andreas Schuster, Rolf Wachter, Thomas Stümpfig, Christina Unterberg-Buchwald, Michael Steinmetz, Christian Oliver Ritter, Joachim Lotz, Wieland Staab
Left atrial (LA) enlargement and dysfunction are markers of chronic diastolic dysfunction and an important predictor of adverse cardiovascular and cerebrovascular outcomes. Accordingly, accurate quantification of left atrial volume (LAV) and function is needed. In routine clinical cardiovascular magnetic resonance (CMR) imaging the biplane area-length method (Bi-ALM) is frequently applied due to time-saving image acquisition and analysis. However, given the varying anatomy of the LA we hypothesized that the diagnostic accuracy of the Bi-ALM is not sufficient and that results would be different from a precise volumetric assessment of transversal multi-slice cine images using Simpson's method...
May 18, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28451353/highly-specific-noninvasive-photoacoustic-and-positron-emission-tomography-of-brain-plaque-with-functionalized-croconium-dye-labeled-by-a-radiotracer
#14
Yajing Liu, Yanping Yang, Mingjian Sun, Mengchao Cui, Ying Fu, Yu Lin, Zijing Li, Liming Nie
Highly-efficient targeting probes are desirable for disease diagnosis and functional imaging. However, most of the current near-infrared (NIR) probes suffer from low signal conversion, insufficient photostability, poor probe specificity, and limited functions. Herein, an NIR ultrahigh absorbing croconium dye for amyloid (CDA) was designed and synthesized to specifically bind to cerebrovascular amyloid without antibody linkage. This unique CDA is able to strongly bind the hydrophobic channels of amyloid beta (Aβ) fiber with a very strong binding energy of -9...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28437244/second-transcatheter-closure-for-residual-shunt-following-percutaneous-closure-of-patent-foramen-ovale
#15
Njomeza Susuri, Slayman Obeid, Mirjam Ulmi, George Cm Siontis, Andreas Wahl, Stephan Windecker, Fabian Nietlispach, Bernhard Meier, Fabien Praz
AIMS: Residual shunt following percutaneous patent foramen ovale (PFO) closure has been described in up to 49% of the patients and is associated with recurrent cerebrovascular events. Our aim was to evaluate the safety, feasibility, and mid-term outcomes of transcatheter residual shunt closure. METHODS AND RESULTS: From 1994 to July 2016, 2679 patients underwent transcatheter PFO closure for treatment of presumed paradoxical embolism at our institution. Among them, 100 patients (3...
April 25, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28430115/a-systematic-review-of-3-d-printing-in-cardiovascular-and-cerebrovascular-diseases
#16
Zhonghua Sun, Shen Yuan Lee
OBJECTIVE: The application of 3-D printing has been increasingly used in medicine, with research showing many applications in cardiovascular disease. This systematic review analyzes those studies published about the applications of 3-D printed, patient-specific models in cardiovascular and cerebrovascular diseases. METHODS: A search of PubMed/Medline and Scopus databases was performed to identify studies investigating the 3-D printing in cardiovascular and cerebrovascular diseases...
June 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28386716/importance-of-variants-in-cerebrovascular-anatomy-for-potential-retrograde-embolization-in-cryptogenic-stroke
#17
Michael Markl, Edouard Semaan, LeRoy Stromberg, James Carr, Shyam Prabhakaran, Jeremy Collins
OBJECTIVES: To test the hypothesis that variants in cerebrovascular anatomy will affect the number of patients demonstrating a plausible retrograde embolization mechanism from plaques in the descending aorta (DAo). METHODS: Thirty-five patients (aged 63 ± 17 years) with cryptogenic stroke underwent 4D flow MRI for the assessment of aortic 3D blood flow and MR angiography for the evaluation of circle of Willis, posterior circulation, and aortic arch architecture...
April 6, 2017: European Radiology
https://www.readbyqxmd.com/read/28384909/immediate-outcome-of-balloon-mitral-valvuloplasty-with-jomiva-balloon-during-pregnancy
#18
Shanmuga Sundaram Rathakrisnnan, Ramona Ramasamy, Tamilarasu Kaliappan, Rajendiran Gopalan, Ramasmy Palanimuthu, Premkrishna Anandhan
INTRODUCTION: Rheumatic mitral stenosis is the most common Valvular Heart Disease encountered during pregnancy. Balloon Mitral Valvuloplasty (BMV) is one of the treatment option available if the symptoms are refractory to the medical management and the valve anatomy is suitable for balloon dilatation. BMV with Inoue balloon is the most common technique being followed worldwide. Over the wire BMV is a modified technique using Joseph Mitral Valvuloplasty (JOMIVA) balloon catheter which is being followed in certain centres...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28268528/estimation-of-voxel-wise-dynamic-cerebrovascular-reactivity-curves-from-resting-state-fmri-data
#19
Prokopis C Prokopiou, Kevin Murphy, Richard G Wise, Georgios D Mitsis
In this work, we investigate the linear dynamic interactions between fluctuations in arterial CO2 that occur during normal breathing, and the BOLD fMRI signal. We cast this problem within a systems-theoretic framework, where we employ functional expansions for the estimation of the impulse responses in large regions of interest, as well as in individual voxels. We also implement classification schemes in order to identify different brain regions with similar cerebrovascular reactivity characteristics. Our results reveal that it is feasible to obtain reliable estimates of cerebrovascular reactivity curves from resting-state data and that these curves exhibit considerable variability across different brain regions that may be related to the underlying anatomy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28256020/left-atrial-anatomy-and-patient-related-factors-associated-with-adverse-outcomes-with-the-watchman-device-a-real-world-experience
#20
Shishir Murarka, Mohamad Lazkani, Soundos Moualla, Divya Ratan Verma, Ashish Pershad
OBJECTIVE: This study sought to identify patient and left atrial morphology specific factors associated with early complications for left atrial appendage occlusion with the Watchman™ (Boston Scientific, Natick, MA) device. BACKGROUND: Oral anticoagulation (OAC) is recommended for patients with atrial fibrillation, however, long-term OAC compliance is poor. In randomized control trials, the Watchman™ device has demonstrated superiority over OAC with warfarin for all cause and cardiovascular mortality and hemorrhagic stroke...
April 2017: Journal of Interventional Cardiology
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