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abdominal aortic aneurysm, imaging

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https://www.readbyqxmd.com/read/30094479/-isolated-iliac-artery-aneurysms-interventional-treatment
#1
REVIEW
T Pfammatter, A Kobe, M L Lachat
CLINICAL ISSUE: Isolated iliac artery aneurysms occur considerably less often than abdominal aortic aneurysms. Mainly older men are affected by this disease. Most of these aneurysms are asymptomatic and are incidentally detected during cross-sectional imaging. Iliac aneurysms with a diameter larger than 3 cm are at risk for rupture, which is associated with high morbidity and mortality. STANDARD TREATMENT: To prevent their rupture as well as for symptomatic or ruptured aneurysms, endovascular treatment has recently been established as the primary approach due to the decreased morbidity and mortality compared to open repair...
August 9, 2018: Der Radiologe
https://www.readbyqxmd.com/read/30092439/left-gastroepiploic-artery-true-aneurysm-case-report-and-review-of-the-literature
#2
Thomas Kotsis, Konstantinos Iliakopoulos, Panagitsa Christoforou, Theodosios Theodosopoulos
Whilst the aneurysm of the splenic artery represents the third most common abdominal arterial aneurysm being next to the aortic and iliac aneurysms, the aneurysm of the gastroepiploic artery is extremely rare occurring at a frequency of 3 - 4% of all visceral arteries; only 22 cases have been reported in the English literature. We present the case of 65-year-old woman with an asymptomatic visceral artery aneurysm which was an incidental ultrasonography finding. Magnetic resonance imaging showed an arterial aneurysm close to the peripheral splenic artery with intense tortuosity of the celiac and splenic artery...
August 6, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/30084107/ceus-versus-ct-angiography-in-the-follow-up-of-abdominal-aortic-endoprostheses-diagnostic-accuracy-and-activity-based-cost-analysis
#3
Niccolo' Faccioli, Giovanni Foti, Giulia Casagranda, Elena Santi, Mirko D'Onofrio
PURPOSE: To evaluate diagnostic accuracy and to perform an activity-based cost analysis of contrast-enhanced ultrasonography (CEUS) compared to computed tomography (CT) during annual surveillance after abdominal aortic aneurysm repair with endovascular procedure (EVAR). MATERIALS AND METHODS: This retrospective study included 137 patients in post-EVAR follow-up over a 6-year period (average post-operatory follow-up without aneurysm sac volumetric reduction). Sensitivity, specificity, positive predictive values, negative predictive values and accuracy were considered for CEUS using CT angiography (CTA) as reference standard...
August 6, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/30079939/endovascular-thoracoabdominal-replacement-after-total-abdominal-aortic-debranching
#4
Murat Ugurlucan, Yilmaz Onal, Omer Ali Sayin, Feza Ekiz, Didem Melis Oztas, Murat Basaran, Bulent Acunas, Ufuk Alpagut
Marfan syndrome is an inherited connective tissue disorder affecting mainly eyes and skeletal and cardiovascular systems. Cardiovascular involvement may lead to life-threatening aortic pathologies including aneurysms and/or dissections. In this report, the authors present images of a patient with Marfan syndrome with a history of Bentall-De Bono procedure followed by aortic arch and infrarenal aortoiliac replacements who strongly refused conventional open repair and underwent abdominal debranching followed by thoracoabdominal endovascular stent grafting for the treatment of thoracoabdominal aneurysm...
February 2018: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/30072821/neural-network-fusion-a-novel-ct-mr-aortic-aneurysm-image-segmentation-method
#5
Duo Wang, Rui Zhang, Jin Zhu, Zhongzhao Teng, Yuan Huang, Filippo Spiga, Michael Hong-Fei Du, Jonathan H Gillard, Qingsheng Lu, Pietro Liò
Medical imaging examination on patients usually involves more than one imaging modalities, such as Computed Tomography (CT), Magnetic Resonance (MR) and Positron Emission Tomography(PET) imaging. Multimodal imaging allows examiners to benefit from the advantage of each modalities. For example, for Abdominal Aortic Aneurysm, CT imaging shows calcium deposits in the aorta clearly while MR imaging distinguishes thrombus and soft tissues better.1 Analysing and segmenting both CT and MR images to combine the results will greatly help radiologists and doctors to treat the disease...
March 2, 2018: Proceedings of SPIE
https://www.readbyqxmd.com/read/30064841/outcomes-of-the-gore-iliac-branch-endoprosthesis-in-clinical-trial-and-real-world-registry-settings
#6
Darren B Schneider, Ross Milner, Jan M M Heyligers, Nabil Chakfé, Jon Matsumura
BACKGROUND: We report midterm outcomes with the GORE Iliac Branch Endoprosthesis (IBE; W. L. Gore & Associates, Flagstaff, Ariz) in the U.S. investigational device exemption (IDE) trial and comparatively assess outcomes in the IDE trial with outcomes in a real-world population of patients treated in the Gore Global Registry for Endovascular Aortic Treatment (GREAT). METHODS: From 2013 to 2016, the IDE trial enrolled 99 patients treated with the IBE for common iliac artery (CIA) aneurysms or aortoiliac aneurysms...
July 28, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/30061774/surgical-repair-of-abdominal-aortic-aneurysm-in-patients-with-simultaneous-urological-disorders-a-single-center-experience
#7
Thomas Kotsis, Athanasios E Dellis
Introduction: Although rare, co-existence of abdominal aortic aneurysms with urological manifestations, suggests a challenging surgical entity in terms of successful aneurysmal repair along with minimally or null urological complications. Case reports: There are neither available data regarding the incidence of their co-existence nor consensus regarding optimal surgical management. Given the infrequency of their simultaneous presentation, the report of unusual cases as well as proposal for successful surgical management, are always useful and educative...
June 2018: Medical Archives
https://www.readbyqxmd.com/read/30058398/identifying-and-addressing-the-limitations-of-evar-technology
#8
Viony M Belvroy, Ignas B Houben, Santi Trimarchi, Himanshu J Patel, Frans L Moll, Joost A van Herwaarden
Endovascular aortic repair (EVAR) has improved over the last two decades. Approximately 80% of the patients presenting with an abdominal aortic aneurysm (AAA) is nowadays primarily treated with EVAR. Areas covered: In this review the differences between endovascular and open repair, the clinical characteristics needed for EVAR, the role of clinical imaging and the developments in EVAR technology will be discussed. Early mortality is lower in EVAR as compared to open repair, whereas this benefit is lost after three years postoperatively...
July 30, 2018: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/30053549/limb-stent-occlusion-from-intraoperative-nellix-stent-migration-and-prolapse
#9
J X Hing, J K Ch'ng, K H Tay, T T Chong
BACKGROUND: Incidence of Nellix stent migration is uncommon despite absence of a proximal fixation mechanism. We present a case of intraoperative Nellix stent migration to highlight the potential complications. Our patient had renal artery occlusion and threatened limb stent perfusion as a result of intraoperative stent migration, with resultant prolapse of the Nellix endobag. We also present a successful salvage procedure to deploy an additional stent to restore limb stent flow. CASE: A 71 year old Chinese gentleman with symptomatic concomitant infrarenal abdominal aortic aneurysm and bilateral common iliac aneurysms was discussed at a multidisciplinary meeting and deemed suitable for endovascular sealing of the aneurysms (EVAS) with the Nellix device...
July 24, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/30029263/abdominal-aortic-aneurysm-endovascular-repair-profiling-post-implantation-morphometry-and-hemodynamics-with-image-based-computational-fluid-dynamics
#10
Paola Tasso, Anastasios Raptis, Miltiadis Matsagkas, Maurizio Lodi Rizzini, Diego Gallo, Michalis Xenos, Umberto Morbiducci
Endovascular aneurysm repair (EVAR) has disseminated rapidly as an alternative to open surgical repair for the treatment of abdominal aortic aneurysms (AAAs), because of its reduced invasiveness, low mortality and morbidity rate. The effectiveness of the endovascular devices used in EVAR is always at question as postoperative adverse events can lead to re-intervention or to a possible fatal scenario for the circulatory system. Motivated by the assessment of the risks related to thrombus formation, here the impact of two different commercial endovascular grafts on local hemodynamics is explored through 20 image-based computational hemodynamic models of EVAR-treated patients (N=10 per each endograft model)...
May 23, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/30012456/determining-the-diagnostic-value-of-18f-fdg-pet-ct-in-detecting-prosthetic-aortic-graft-infection
#11
Anuja Mitra, Deborah Pencharz, Meryl Davis, Thomas Wagner
OBJECTIVE: To determine the diagnostic value of 18F-fluorodeoxyglucose positron emission/ computed tomography (FDG PET/CT) in detecting prosthetic aortic graft infection (AGI). METHODS: Twenty-one patients with prosthetic grafts for abdominal aortic aneurysms underwent FDG PET/CT scans for suspected graft infection over a 15-month period. Images were evaluated for tracer pattern and grade of FDG uptake in addition to measuring the maximal standardised uptake value (SUVmax)...
July 13, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29998415/a-numerical-preoperative-planning-model-to-predict-arterial-deformations-in-endovascular-aortic-aneurysm-repair
#12
Hossein Mohammadi, Simon Lessard, Eric Therasse, Rosaire Mongrain, Gilles Soulez
Endovascular aneurysm repair is rapidly emerging as the primary preferred method for treating abdominal aortic aneurysm. In this image-guided interventional procedure, to obtain the roadmap and decrease contrast injections, preoperative CT images are overlaid onto live fluoroscopy images using various 2D/3D image fusion techniques. However, the structural changes due to the insertion of stiff tools degrade the fusion accuracy. To correct the mismatch and quantify the intraoperative deformations, we present a patient-specific biomechanical model of the aorto-iliac structure and its surrounding tissues...
July 11, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29994206/high-frame-rate-contrast-enhanced-ultrasound-for-velocimetry-in-the-human-abdominal-aorta
#13
J Voorneveld, S Engelhard, H J Vos, M M P J Reijnen, F Gijsen, M Versluis, E Groot Jebbink, N de Jong, J G Bosch
Treatment of abdominal aortic (AA) aneurysms and stenotic lesions may be improved by analyzing their associated blood flow patterns. Angle-independent blood flow patterns in the AA can be obtained by combining echo-particle image velocimetry (ePIV) with high frame rate contrast-enhanced ultrasonography. However, ePIV performance is affected by ultrasound contrast agent (UCA) concentration, microbubble stability and tissue clutter. In this study we assessed the influence of acoustic pressure and UCA concentration on image quality for ePIV analysis...
June 11, 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29993480/prediction-of-abdominal-aortic-aneurysm-growth-using-dynamical-gaussian-process-implicit-surface
#14
Huan N Do, Ahsan Ijaz, Hamidreza Gharahi, Byron Zambrano, Jongeun Choi, Whal Lee, Seungik Baek
An Abdominal Aortic Aneurysm (AAA) is a form of vascular disease causing focal enlargement of the abdominal aorta. It affects a large part of the population, and in case of rupture, has up to 90% mortality rate. Recent clinical recom- mendations suggest that people with small aneurysms should be examined 3-36 months depending on the size, to monitor morphological changes. While advances in biomechanics provide state-of-the-art spatial estimates of stress distributions of AAAs, there are still limitations in modeling its time evolution and uncertainty qualification...
July 2, 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29981736/-aorto-cava-fistula-complicating-abdominal-aorta-aneurysm
#15
L Quenum, F Mvumbi, B Alami, M Boubbou, M Maaroufi, Y Alaoui Lamrani
We report here a case of aorto-cava fistula complicating the rupture of a sub-renal aortic aneurysm into the inferior vena cava, which is a rare complication of aortic abdominal aneurysms with often-fatal outcome. Abdominal computed tomography with multi-planar reconstructions remains the firstline-imaging tool allowing positive diagnosis and preoperative planning. Treatment may be surgical or endovascular.
July 2018: Journal de Médecine Vasculaire
https://www.readbyqxmd.com/read/29942890/abdominal-aortic-aneurysm-with-periaortic-malignant-lymphoma-differentiated-from-aneurysmal-rupture-by-clinical-presentation-and-magnetic-resonance-imaging
#16
Sokichi Kamata, Yoshito Itou, Koji Idoguchi, Masami Imakita, Toshihiro Funatsu, Toshikatsu Yagihara
Abdominal aortic aneurysm (AAA) associated with periaortic malignant lymphoma is difficult to differentiate from aneurysmal rupture because of similarities in their clinical presentation and appearance on computed tomography images. We here report a case of AAA associated with periaortic malignant lymphoma diagnosed preoperatively with an absence of typical symptoms, showing that AAA in periaortic malignant lymphoma can present without any clinical correlates. Magnetic resonance imaging was used to confirm the diagnosis...
June 2018: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29941385/transabdominal-direct-sac-puncture-embolization-of-type-ii-endoleaks-after-endovascular-abdominal-aortic-aneurysm-repair
#17
Rebecca Zener, George Oreopoulos, Robert Beecroft, Dheeraj K Rajan, Jeffrey Jaskolka, Kong Teng Tan
PURPOSE: To determine the efficacy and safety of transabdominal direct sac puncture embolization of type II endoleaks after endovascular abdominal aortic aneurysm repair (EVAR). MATERIALS AND METHODS: This retrospective review included 30 patients (4 women, 26 men; mean age = 79.1 years) who underwent 33 transabdominal direct sac puncture embolization procedures for type II endoleaks after EVAR. Embolization agents included cyanoacrylate glue only (45.5%), glue/coils (36...
June 22, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29935861/prevalence-of-synchronous-and-metachronous-aneurysms-in-women-with-abdominal-aortic-aneurysm
#18
Jonas Wallinder, Anna Georgiou, Anders Wanhainen, Martin Björck
BACKGROUND: Abdominal aortic aneurysm (AAA) is three to five times more common among men compared with women, yet up to 38% of all aneurysm related deaths affect women. The aim of this study was to estimate the prevalence of synchronous or metachronous aneurysms among women with AAA, as diagnosis and treatment could improve survival. PATIENTS AND METHODS: This is a retrospective study of prospectively registered patients. All women operated on, or under surveillance for, AAA were identified at two Swedish hospitals...
June 20, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29921611/smggds-prevents-thoracic-aortic-aneurysm-formation-and-rupture-by-phenotypic-preservation-of-aortic-smooth-muscle-cells
#19
Masamichi Nogi, Kimio Satoh, Shinichiro Sunamura, Nobuhiro Kikuchi, Taijyu Satoh, Ryo Kurosawa, Junichi Omura, Md Elias Al-Mamun, Mohammad Abdul Hai Siddique, Kazuhiko Numano, Shun Kudo, Satoshi Miyata, Masatoshi Akiyama, Kiichiro Kumagai, Shunsuke Kawamoto, Yoshikatsu Saiki, Hiroaki Shimokawa
Background -Thoracic aortic aneurysm (TAA) and dissection (TAD) are fatal diseases, which cause aortic rupture and sudden death. The small GTP-binding protein GDP dissociation stimulator (SmgGDS) is a crucial mediator of the pleiotropic effects of statins. Previous studies revealed that reduced force generation in AoSMCs causes TAA and TAD. Methods -To examine the role of SmgGDS in TAA formation, we employed an angiotensin II (AngII, 1,000 ng/min/kg, 4 weeks)-induced TAA model. Results -33% Apoe-/- SmgGDS+/- mice died suddenly due to TAA rupture, whereas there was no TAA rupture in Apoe-/- control mice...
June 19, 2018: Circulation
https://www.readbyqxmd.com/read/29914827/geometric-analysis-of-ruptured-and-nonruptured-abdominal-aortic-aneurysms
#20
Masaru Kimura, Katsuyuki Hoshina, Kazuhiro Miyahara, Jun Nitta, Masaharu Kobayashi, Sota Yamamoto, Marie Ohshima
OBJECTIVE: The objective of this study was to use parameters to determine the geometric differences between ruptured abdominal aortic aneurysms (AAAs) and nonruptured AAAs. METHODS: Computed tomography data of 38 ruptured AAAs and 215 electively repaired (nonruptured) AAAs were collected from multiple institutes. We compared the ruptured AAA group and nonruptured AAA group with 1:1 matching by using the Mahalanobis distance, which was calculated using the patient's age, sex, and AAA diameter...
June 15, 2018: Journal of Vascular Surgery
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