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abdominal aortic dissection

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https://www.readbyqxmd.com/read/28095402/a-general-shear-dependent-model-for-thrombus-formation
#1
Alireza Yazdani, He Li, Jay D Humphrey, George Em Karniadakis
Modeling the transport, activation, and adhesion of platelets is crucial in predicting thrombus formation and growth following a thrombotic event in normal or pathological conditions. We propose a shear-dependent platelet adhesive model based on the Morse potential that is calibrated by existing in vivo and in vitro experimental data and can be used over a wide range of flow shear rates ([Formula: see text]). We introduce an Eulerian-Lagrangian model where hemodynamics is solved on a fixed Eulerian grid, while platelets are tracked using a Lagrangian framework...
January 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28076621/experimental-model-for-sutureless-proximal-anastomosis-by-the-viabahn-open-revascularization-technique-vortec
#2
Lucas Marcelo Dias Freire, Giuliana Biasi Gobbi, Inácio Maria Dal Fabbro, Fábio Hüsemann Menezes
Introduction: In the treatment of complex aneurysms, debranching is an extra-anatomical revascularization of visceral arteries followed by endograft coverage of the thoracoabdominal aorta. It eliminates the need for a thoracotomy and aortic clamping, but requires the performance of several technically demanding visceral anastomosis. In 2008, Lachat described visceral revascularization with the use of a sutureless distal anastomosis, performed by the telescoping of an endograft in the visceral branch, named VORTEC (Viabahn Open Revascularization TEChnique)...
November 2016: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28062548/modified-frozen-elephant-trunk-for-acute-type-a-aortic-dissection-a-comparative-study-with-standard-repair-technique
#3
Peter Matt, Prerana Banerjee, Martin Grapow, Florian Rueter, Ulrich Schurr, Martin Siegemund, Jens Fassl, Oliver Reuthebuch, Friedrich Eckstein
OBJECTIVES: We hypothesized that antegrade open stent graft implantation in the descending aorta during acute type A aortic dissection surgery is safe and improves patient outcome compared with the standard repair technique. METHODS: Hundred and forty-one consecutive patients underwent surgery for acute type A aortic dissection at our institution from 2010 to 2016. Of those, 104 patients underwent ascending aorta and hemiarch repair under hypothermic circulatory arrest with antegrade cerebral perfusion (standard group)...
January 5, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28062500/translational-relevance-and-recent-advances-of-animal-models-of-abdominal-aortic-aneurysm
#4
Jean Senemaud, Giuseppina Caligiuri, Harry Etienne, Sandrine Delbosc, Jean-Baptiste Michel, Raphaël Coscas
Human abdominal aortic aneurysm (AAA) pathophysiology is not yet completely understood. In conductance arteries, the insoluble extracellular matrix, synthesized by vascular smooth muscle cells, assumes the function of withstanding the intraluminal arterial blood pressure. Progressive loss of this function through extracellular matrix proteolysis is a main feature of AAAs. As most patients are now treated via endovascular approaches, surgical AAA specimens have become rare. Animal models provide valuable complementary insights into AAA pathophysiology...
January 5, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28050476/spectrum-of-abdominal-aortic-disease-in-a-tertiary-health-care-setup-mdct-based-observational-study
#5
Dg Santosh Kumar, Venkatraman Bhat, Karthik Gadabanahalli, Arjun Kalyanpur
INTRODUCTION: Abdominal aortic disease is an important cause of clinical disability that requires early detection by imaging methods for prompt and effective management. Understanding regional disease pattern and prevalence has a bearing on healthcare management and resource planning. Non-invasive, conclusive imaging strategy plays an important role in the detection of disease. Multi-Detector Computed Tomography (MDCT) with its technological developments provides affordable, accurate and comprehensive imaging solution...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28043436/endovascular-repair-of-type-a-aortic-dissection-current-experience-and-technical-considerations
#6
Joshua D Horton, Tilo Kölbel, Stephan Haulon, Ali Khoynezhad, Richard M Green, Michael A Borger, Firas F Mussa
Dissection of the ascending aorta, type A aortic dissection (TAAD), represents a surgical emergency with high morbidity and mortality. Current open surgical techniques, although state-of-the-art procedures and having improved outcomes for patients with TAAD over the last decades, confer significant risk of complications and death. Recently, endovascular techniques for repair of both the abdominal and thoracic aorta have gained acceptance within the vascular and cardiovascular surgical communities as a useful tool in select pathologies and patient populations...
July 2016: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28018832/limited-distal-arch-open-stenting-for-type-b-aortic-dissection-with-an-enlarged-ulcer-like-projection-complicated-by-abdominal-aortic-occlusion
#7
Mitsumasa Hata, Kenji Akiyama, Yukihiko Orime
A 79-year-old man underwent bifurcated graft replacement for abdominal aortic aneurysm, but the graft was totally occluded owing to an acute type B aortic dissection. We could not have access to the root for performing endovascular stenting for dissecting aneurysm. Furthermore, it was difficult to remove the aneurysm via a left thoracotomy because it was impossible to perfuse the lower body with blood from the femoral artery and also a left axillary arterial cannulation was unusable. Herein, we report a patient who was successfully treated with open surgical aortic stenting for an enlarged ulcer-like projection complicated by a type B aortic dissection...
December 2016: Thoracic and Cardiovascular Surgeon Reports
https://www.readbyqxmd.com/read/28017582/outcomes-of-conservative-management-of-spontaneous-celiac-artery-dissection
#8
Akihiro Hosaka, Masaru Nemoto, Tetsuro Miyata
OBJECTIVE: Spontaneous celiac artery (CA) dissection without associated aortic dissection is a rare condition. Although this condition has been diagnosed more frequently with the advent of improved diagnostic imaging modalities, its pathogenesis and treatment strategy remain to be established. The present study examined the clinical features and outcomes of conservative management of this disease. METHODS: The study included 12 patients (10 men and two women) in whom spontaneous CA dissection was diagnosed between 2007 and 2015...
December 22, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27994881/endovascular-treatment-of-spontaneous-isolated-abdominal-aortic-dissection
#9
Anna Maria Giribono, Doriana Ferrara, Flavia Spalla, Donatella Narese, Umberto Bracale, Felice Pecoraro, Renata Bracale, Luca Del Guercio, Umberto Marcello Bracale
Isolated abdominal aortic dissection is a rare clinical disease representing only 1.3% of all dissections. There are a few case series reported in the literature. The causes of this pathology can be spontaneous, iatrogenic, or traumatic. Most patients are asymptomatic and symptoms are usually abdominal or back pain, while claudication and lower limb ischemia are rare. Surgical and endovascular treatment are two valid options with acceptable results. We herein describe nine cases of symptomatic spontaneous isolated abdominal aortic dissection, out of which four successfully were treated with an endovascular approach between July 2003 and July 2013...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/27993378/aortic-remodeling-after-endovascular-repair-of-complicated-acute-type-b-aortic%C3%A2-dissection
#10
Bradley G Leshnower, Yazan M Duwayri, Edward P Chen, Chun Li, Carl A Zehner, Jose N Binongo, Ravi K Veeraswamy
BACKGROUND: Thoracic endovascular aortic repair (TEVAR) is the optimal therapy for complicated acute type B aortic dissection (aTBAD). This study examined clinical outcomes and aortic remodeling parameters after TEVAR for patients with complicated aTBAD. METHODS: From January 2012 to December 2015, 51 patients underwent TEVAR for complicated aTBAD. Preoperative and postoperative imaging studies were analyzed for sizes of the true lumen (TL) and false lumen (FL) and for the FL thrombosis status at five locations in the thoracic and abdominal aorta...
December 16, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27976796/endovascular-management-of-heavily-calcified-abdominal-aorta-dissection-during-transcatheter-aortic-valve-implantation
#11
Panagiotis Antiochos, Pierre Monney, Stephane Fournier, Christan Roguelov, Salah Qanadli, Eric Eeckhout, Olivier Muller
No abstract text is available yet for this article.
2016: Cardiology Journal
https://www.readbyqxmd.com/read/27932767/-mid-and-long-term-result-of-celiac-artery-coverage-in-tevar-treatment-for-aortic-dissection
#12
Ming Li, Chang Shu, Quanming Li, Tun Wang, Kun Fang
To observe the mid- and long-term result of intentional coverage of celiac artery in thoracic endovascular aortic repair (TEVAR) surgery for aortic dissection.
 Methods: We retrospectively analyzed 21 cases who received TEVAR with celiac artery coverage during the operation. The existence of collaterals between celiac artery (CA) and superior mesenteric artery (SMA) was confirmed by preoperative CT angiography (CTA) or digital substract angiography (DSA) for each patient. We used the stent-graft precisely above the orifice of SMA...
November 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/27906676/role-of-systematic-lymphadenectomy-as-part-of-primary-debulking-surgery-for-optimally-cytoreduced-advanced-ovarian-cancer-reappraisal-in-the-era-of-radical-surgery
#13
Kyung Jin Eoh, Jung-Yun Lee, Jung Won Yoon, Eun Ji Nam, Sunghoon Kim, Sang-Wun Kim, Young Tae Kim
The prognostic significance of pelvic and para-aortic lymphadenectomy during primary debulking surgery for advanced-stage ovarian cancer remains unclear. This study aimed to evaluate the survival impact of lymph node dissection (LND) in patients treated with optimal cytoreduction for advanced ovarian cancer. Data from 158 consecutive patients with stage IIIC-IV disease who underwent optimal cytoreduction (<1 cm) were obtained via retrospective chart review. Patients were classified into two groups: (1) lymph node sampling (LNS), node count <20; and (2) LND, node count ≥20...
November 29, 2016: Oncotarget
https://www.readbyqxmd.com/read/27903477/simultaneous-endovascular-repair-for-thoracic-and-abdominal-aortic-pathologies-early-and-midterm-results
#14
Yuanyuan Guo, Hongbo Cai, Bin Yang, Hui Jin
BACKGROUND: To analyze information from a single clinical center, evaluating early and midterm results of simultaneous thoracic endovascular aortic repair (TEVAR) and endovascular aneurysm repair (EVAR) for coexisting thoracic and abdominal aortic pathologies. METHODS: From January 2005 to December 2014, 13 patients (8 men, 5 women; mean age, 75.3 years; range, 69-82 years) with concomitant thoracic and abdominal aortic disease (aneurysms, type B dissection, penetrating aortic ulcers) were treated with simultaneous TEVAR and EVAR...
November 27, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27903475/technical-aspects-of-open-repair-for-degenerative-aneurysmal-evolution-despite-early-thoracic-endovascular-repair-of-type-b-aortic-dissection
#15
Sonia Aguir, Salma El Batti, Paul Achouh, Pierre Julia, Alain Bel, Jean-Noël Fabiani, Jean-Marc Alsac
BACKGROUND: Closure of the proximal tear by thoracic endovascular aortic repair (TEVAR) at the acute phase appears to be a safe effective treatment to prevent aneurysmal degeneration type B dissection. However, it appears to be inefficient in up to a third of the patient. We report the technical aspects of our experience with patients undergoing secondary open repair after TEVAR for dissecting thoracoabdominal aneurysm despite early closure proximal tear by TEVAR. METHODS: During a period of 5 years, 96 patients presenting acute type B aortic dissections were treated by TEVAR and followed-up in our institution...
November 27, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27900728/distant-lymph-node-metastases-caused-by-esophageal-cancer-invasion-to-the-lamina-propria-a-case-report
#16
Satoshi Tsutsumi, Hiroshi Saeki, Yuichiro Nakashima, Yu Nakaji, Kensuke Kudou, Ryosuke Tsutsumi, Sho Nishimura, Shingo Akiyama, Hirotada Tajiri, Takafumi Yukaya, Kimihiro Tanaka, Ryota Nakanishi, Masahiko Sugiyama, Kippei Ohgaki, Hideto Sonoda, Minako Hirahashi, Eiji Oki, Masaru Morita, Yoshinao Oda, Yoshihiko Maehara
BACKGROUND: Pathological examination after endoscopic submucosal dissection revealed that a 62-year-old male had esophageal squamous cell carcinoma with lamina propria mucosal invasion and lymphatic permeation. CASE PRESENTATION: The patient underwent subtotal esophagectomy and reconstruction as an additional therapy. At 3 years and 4 months after esophagectomy, enlargement of abdominal para-aortic lymph nodes metastases was detected by computed tomography scanning...
December 2016: Surgical Case Reports
https://www.readbyqxmd.com/read/27894713/abdominal-aortic-aneurysm-in-marfan-syndrome
#17
Tracy Hagerty, Patrick Geraghty, Alan C Braverman
OBJECTIVE: Marfan syndrome (MFS) leads to aortic root aneurysm, while descending thoracic aortic aneurysm (TAA) occurs less commonly. Abdominal aortic aneurysm (AAA) is rarely reported in MFS. Risk factors for AAA are poorly understood and there are no guidelines for AAA screening in MFS. We sought to characterize AAA among Marfan patients in our center. METHODS: The records of 12 adults with MFS and AAA disease were reviewed. Clinical features, imaging, operative reports, and outcomes were analyzed...
November 25, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27890847/fenestrated-and-branched-stent-grafting-in-complex-aneurysmatic-aortic-disease-a-single-center-early-experience
#18
Georgios D Vourliotakis, Vasileios D Tzilalis, Panagiotis G Theodoridis, Charalampos S Stoumpos, Dimitrios G Kamvysis, Ioannis G Kantounakis
BACKGROUND: The aim of this study is to present our early experience and highlight the technical difficulties associated with the use of fenestrated and branched stent grafts to treat patients with juxtarenal abdominal aortic aneurysm (AAA), pararenal AAA, and thoracoabdominal aortic aneurysms (TAAAs). METHODS: A prospectively held database maintained at our department was queried for patients who have undergone branched and fenestrated stent grafting for AAA or TAAA treatment...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27887856/preoperative-thoracic-false-lumen-branches-relate-to-aortic-remodeling-after-thoracic-endovascular-aortic-repair-for-debakey-iiib-aortic-dissection
#19
Yang Yang Ge, Wei Guo, Nick Cheshire, Xiao Ping Liu, Xin Jia, Jiang Xiong, Xiao Hui Ma, Hong Peng Zhang
OBJECTIVE: This study evaluated the association between thoracic false lumen branches (TFLBs; dissected thoracic branches fed by a false lumen) and distal thoracic aortic enlargement (DTAE) after thoracic endovascular aortic repair (TEVAR) for DeBakey IIIb aortic dissection. METHODS: We retrospectively analyzed the records of 67 patients with DeBakey IIIb dissection initially treated with TEVAR between January 2011 and December 2013. Preoperative and postoperative computed tomography angiography images were reviewed to evaluate the number of preoperative TFLBs and aortic diameter change after TEVAR...
November 22, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27871094/biomechanical-responses-of-pmhs-subjected-to-abdominal-seatbelt-loading
#20
Rakshit Ramachandra, Yun-Seok Kang, John H Bolte, Alena Hagedorn, Rodney Herriott, Jason A Stammen, Kevin Moorhouse
Past studies have found that a pressure based injury risk function was the best predictor of liver injuries due to blunt impacts. In an effort to expand upon these findings, this study investigated the biomechanical responses of the abdomen of post mortem human surrogates (PMHS) to high-speed seatbelt loading and developed external response targets in conjunction with proposing an abdominal injury criterion. A total of seven unembalmed PMHS, with an average mass and stature of 71 kg and 174 cm respectively were subjected to belt loading using a seatbelt pull mechanism, with the PMHS seated upright in a freeback configuration...
November 2016: Stapp Car Crash Journal
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