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Rupture aortic aneurysm

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https://www.readbyqxmd.com/read/28538996/the-relationship-between-surface-curvature-and-abdominal-aortic-aneurysm-wall-stress
#1
Sergio Ruiz de Galarreta, Aitor Cazon, Raúl Antón, Ender A Finol
The maximum diameter criterion is the most important factor when predicting risk of rupture of abdominal aortic aneurysms (AAA). An elevated wall stress has also been linked to a high risk of aneurysm rupture, yet is an uncommon clinical practice to compute AAA wall stress. The purpose of this study is to assess whether other characteristics of the AAA geometry are statistically correlated with wall stress. Using in-house segmentation and meshing algorithms, thirty patient-specific AAA models were generated for finite element analysis...
May 24, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28528280/aortic-involvement-in-relapsing-polychondritis
#2
Maëlle Le Besnerais, Laurent Arnaud, Jonathan Boutémy, Boris Bienvenu, Hervé Lévesque, Zahir Amoura, Isabelle Marie
OBJECTIVE: To assess prevalence of aortic involvement in relapsing polychondritis (RP) patients; to evaluate clinical features and long-term outcome of RP patients exhibiting aortitis, aortic ectasia and/or aneurysm. METHODS: 172 RP patients underwent aortic computed tomography (CT)-scan; they were seen in 3 medical centers. RESULTS: 11 patients (6.4%) had aortic involvement, occurring within a median time of 2 years after RP diagnosis. CT-scan showed isolated aortitis (n=2); the 9 other patients exhibited: aortitis and aortic aneurysm (n=2) or ectasia (n=1), isolated aortic aneurysm (n=4) or ectasia (n=2); aortic localizations were as follows: thoracic (n=6), abdominal (n=2), thoracic and abdominal (n=4) aorta...
May 17, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28527926/initial-and-midterm-results-of-the-bolton-relay-thoracic-aortic-endovascular-pivotal-trial
#3
Mark A Farber, W Anthony Lee, Wilson Y Szeto, Jean M Panneton, Christopher J Kwolek
OBJECTIVE: To report the initial and midterm results of the Bolton Relay Thoracic Stent Graft for the endovascular treatment of thoracic aortic lesions [thoracic endovascular aortic repair (TEVAR)]. METHODS: The Bolton Relay Thoracic Aortic Endovascular Pivotal Trial was a prospective, nonrandomized, multicenter, U.S. Investigational Device Exemption study conducted at 27 U.S. investigational sites. One hundred twenty TEVAR subjects were treated with the Relay device between January 2007 and May 2010, with 13 patients enrolled during the continued access phase through September 2012...
June 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28527730/experiences-of-the-screening-process-and-the-diagnosis-abdominal-aortic-aneurysm-among-65-year-old-men-from-invitation-to-a-1-year-surveillance
#4
Monica Pettersson, Anders Hansson, John Brodersen, Christine Kumlien
The prevalence of abdominal aortic aneurysm (AAA) is reported to be 2.2%-8% among men >65 years. During recent years, screening programs have been developed to detect AAA, prevent ruptures, and thereby saving lives. Therefore, most men with the diagnosis are monitored conservatively with regular reviews. The objective of the study was to describe how men diagnosed with abdominal aortic aneurysm <55 mm discovered by screening experience the process and diagnosis from invitation to 1 year after screening...
June 2017: Journal of Vascular Nursing: Official Publication of the Society for Peripheral Vascular Nursing
https://www.readbyqxmd.com/read/28526396/the-impact-of-initial-misdiagnosis-of-ruptured-abdominal-aortic-aneurysms-on-lead-times-complication-rate-and-survival
#5
K Smidfelt, C Drott, K Törngren, J Nordanstig, J Herlitz, M Langenskiöld
OBJECTIVE/BACKGROUND: To investigate the frequency of initial misdiagnosis and the clinical consequences of an initial misdiagnosis of ruptured abdominal aortic aneurysms (rAAA). METHODS: This was a retrospective cohort study. Data from the Swedish National Registry for Vascular Surgery (Swedvasc) and medical charts were extracted for patients treated for rAAA in the West of Sweden in the period 2008-14. Initially misdiagnosed patients were compared with correctly diagnosed patients...
May 16, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28514895/outcomes-after-use-of-aortouniiliac-endoprosthesis-versus-modular-or-unibody-bifurcated-endoprostheses-for-endovascular-repair-of-ruptured-abdominal-aortic-aneurysms
#6
Prateek K Gupta, Kelly Kempe, Reshma Brahmbhatt, Himani Gupta, Jorge Montes, R Armour Forse, Shaun M Stickley, Michael J Rohrer
OBJECTIVES: Outcomes after endovascular repair (EVAR) of ruptured abdominal aortic aneurysms (rAAAs) have been widely published. There is, however, controversy on the role of the use of aortouniiliac endoprosthesis (AUI) versus modular or unibody bifurcated endoprosthesis (MUB) for repair of rAAAs. We study and compare 30-day outcomes after use of AUI and MUB for all rAAAs focusing specifically on patients with instability. MATERIALS AND METHODS: Patients who underwent EVAR for rAAA (n = 425) using AUI (n = 55; 12...
January 1, 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28512734/mitral-valve-aneurysms-clinical-characteristics-echocardiographic-abnormalities-and-possible-mechanisms-of-formation
#7
José Luiz B Pena, Tarciso O Bomfim, Paulo R L Fortes, Charles Simão-Filho, José de Souza Andrade-Filho
AIMS: Mitral valve aneurysms (MVA) are most frequently associated with endocarditis. Echocardiography is the method of choice for diagnosis, and color flow imaging is an important, easy method to detect MVA ruptures. We aimed to study the clinical and echocardiographic findings and their relation to the mechanism of aneurysm formation. METHODS AND RESULTS: We reviewed clinical and echocardiographic records of 18 patients during a 17-year period, corresponding to 0...
May 16, 2017: Echocardiography
https://www.readbyqxmd.com/read/28506561/the-consequences-of-real-life-practice-of-early-abdominal-aortic-aneurysm-repair-a-cost-benefit-analysis
#8
S M Tomee, E Bastiaannet, M L Schermerhorn, J Golledge, J F Hamming, J H Lindeman
BACKGROUND: The reported 54 mm median intervention diameter for endovascular aneurysm repair (EVAR) in the Vascular Quality Initiative and European data from the Pharmaceutical Aneurysm Stabilisation Trial (PHAST) implies that in real life the majority of abdominal aortic aneurysm (AAA) repairs occur at diameters smaller than the consensus intervention threshold of 55 mm. This study explores the potential consequences of this practice. METHODS: The differences between real life AAA repair and consensus based intervention threshold were explored in reported data from vascular quality initiatives and PHAST...
May 12, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28506478/metformin-treatment-does-not-affect-the-risk-of-ruptured-abdominal-aortic-aneurysms
#9
Katrine L Kristensen, Anton Pottegård, Jesper Hallas, Lars M Rasmussen, Jes S Lindholt
OBJECTIVE: Diabetes counteracts formation and rupture of abdominal aortic aneurysms, possibly through arterial matrix accumulation. Use of metformin, on the other hand, reduces arterial accumulation of matrix molecules. Consequently, we hypothesized that metformin treatment may reverse the protective role of diabetes on the development and course of aneurysms, that is, that metformin would be associated with aneurysm rupture among individuals with diabetes. METHODS: Using nationwide Danish registry data, we performed a nested case-control study on the association between long-term use of metformin and ruptured abdominal aortic aneurysm (RAAA)...
May 12, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28502540/trends-and-outcomes-in-endovascular-and-open-surgical-treatment-of-visceral-aneurysms
#10
Jason A Chin, Adele Heib, Cassius I Ochoa Chaar, Jonathan A Cardella, Kristine C Orion, Timur P Sarac
OBJECTIVE: Visceral artery aneurysms (VAAs) are rare but often repaired because of dire consequences of rupture. This is a population-based evaluation of chronologic trends in management, risk factors, and outcomes of endovascular and open therapy. METHODS: The 2003 to 2013 Agency for Healthcare Research and Quality (AHRQ) National Inpatient Sample (NIS) database was reviewed. Cases with primary diagnosis of VAA and undergoing endovascular or open repair were identified...
May 11, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28501656/perioperative-outcomes-of-open-versus-endovascular-repair-for-ruptured-thoracoabdominal-aneurysms
#11
Satinderjit S Locham, Joshua C Grimm, Isibor J Arhuidese, Besma Nejim, Tammam Obeid, James H Black, Mahmoud B Malas
OBJECTIVES: Open aneurysm repair (OAR) remains the gold standard for treating ruptured thoracoabdominal-aortic-aneurysms (TAAA). The aim of our study is to compare the 30-day post-operative outcomes among patients with ruptured TAAA undergoing OAR versus endovascular aneurysm repair. METHODS: Using the NSQIP database (2006-2015), we identified patients who underwent OAR and endovascular repair for a ruptured TAAA. Postoperative outcomes of interest included: mortality, renal failure, stroke, and cardiopulmonary complications...
May 10, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28500602/a-new-mouse-model-for-introduction-of-aortic-aneurysm-by-implantation-of-deoxycorticosterone-acetate-pellets-or-aldosterone-infusion-in-the-presence-of-high-salt
#12
Shu Liu, Ming C Gong, Zhenheng Guo
Dysfunction of the renin-angiotensin-aldosterone system (RAAS) has been implicated in the etiologies of many cardiovascular diseases, including aortic aneurysm. In particular, the infusion of angiotensin II (Ang II) in the apolipoprotein E-deficient mice (apoE-/-) and low density lipoprotein receptor knockout mice (LDLR-/-) to induce aortic aneurysm has been extensively used in the field. In contrast, whether aldosterone (Aldo), an essential component of RAAS and a downstream effector of Ang II, is involved in aortic aneurysm is largely unknown...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28496087/-rupture-of-an-aneurysm-of-the-right-sinus-of-valsalva-into-the-pericardium-report-of-a-case
#13
Satoshi Uesugi, Koji Kawahito, Hirotaka Sato, Akira Sugaya, Yoshio Misawa
A sinus of Valsalva aneurysm is an uncommon cardiac anomaly. The aneurysm usually ruptures into the cardiac cavity, and rupture into the pericardial cavity is unusual. A 69-year-old man was admitted to our hospital after collapse due to cardiac tamponade. Computed tomography revealed a ruptured right sinus of Valsalva aneurysm (5 cm) with massive pericardial effusion. The right coronary artery arose from the aneurysm. Severe aortic regurgitation due to the lack of coaptation of the valves was detected by echocardiography...
May 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28495534/hybrid-treatment-of-the-aberrant-right-subclavian-artery-arteria-lusoria-feasibility-study-on-180-angio-cts
#14
Nicla Settembre, Charbel Saba, Zakariyae Bouziane, Fanette Jeannon, Damien Mandry, Serguei Malikov
OBJECTIVES: The aberrant right subclavian artery or arteria lusoria (AL) is the most frequent anatomical variation of the supra-aortic trunks (SAT). Treatment is only warranted in presence of an aneurysm because of the risk of rupture or in symptomatic cases with signs of compression of the esophagus or the trachea, with embolisms causing right upper limb ischemia of vertebrobasilar cerebrovascular accidents (CVA). The conventional surgical treatment of AL is the closure of the origin of AL and the revascularization of the artery right subclavian through a left thoracotomy...
May 8, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28494272/a-new-inverse-method-for-estimation-of-in-vivo-mechanical-properties-of-the-aortic-wall
#15
Minliang Liu, Liang Liang, Wei Sun
The aortic wall is always loaded in vivo, which makes it challenging to estimate the material parameters of its nonlinear, anisotropic constitutive equation from in vivo image data. Previous approaches largely relied on either computationally expensive finite element models or simplifications of the geometry or material models. In this study, we investigated a new inverse method based on aortic wall stress computation. This approach consists of the following two steps: (1) computing an "almost true" stress field from the in vivo geometries and loading conditions, (2) building an objective function based on the "almost true" stress fields, constitutive equations and deformation relations, and estimating the material parameters by minimizing the objective function...
May 2, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28493108/percutaneous-septectomy-in-chronic-dissection-with-abdominal-aortic-aneurysm-creates-uniluminal-neck-for-evar
#16
Mark Colin Gissler, Yukihisa Ogawa, Jason T Lee, Venita Chandra, Michael D Dake
PURPOSE: The intent of this report is to describe the technical details and rationale of endovascular septectomy using a wire saw maneuver in cases of chronic aortic dissection and associated infra-renal aortic aneurysm to allow standard endovascular abdominal aortic graft placement; preliminary clinical experience is also retrospectively reviewed. MATERIALS AND METHODS: Between June 2013 and June 2016, four consecutive patients (mean age 55.3 years; range 52-58 years) with chronic type B aortic dissection and isolated infra-renal abdominal aortic aneurysm (AAA) underwent endovascular aneurysm repair (EVAR) following guidewire septectomy to create a suitable proximal aortic landing zone...
May 10, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28490606/comparison-of-10-murine-models-reveals-a-distinct-biomechanical-phenotype-in-thoracic-aortic-aneurysms
#17
C Bellini, M R Bersi, A W Caulk, J Ferruzzi, D M Milewicz, F Ramirez, D B Rifkin, G Tellides, H Yanagisawa, J D Humphrey
Thoracic aortic aneurysms are life-threatening lesions that afflict young and old individuals alike. They frequently associate with genetic mutations and are characterized by reduced elastic fibre integrity, dysfunctional smooth muscle cells, improperly remodelled collagen and pooled mucoid material. There is a pressing need to understand better the compromised structural integrity of the aorta that results from these genetic mutations and renders the wall vulnerable to dilatation, dissection or rupture. In this paper, we compare the biaxial mechanical properties of the ascending aorta from 10 murine models: wild-type controls, acute elastase-treated, and eight models with genetic mutations affecting extracellular matrix proteins, transmembrane receptors, cytoskeletal proteins, or intracellular signalling molecules...
May 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28490232/the-candy-plug-technique-technical-aspects-and-early-results-of-a-new-endovascular-method-for-false-lumen-occlusion-in-chronic-aortic-dissection
#18
Fiona Rohlffs, Nikolaos Tsilimparis, Beatrice Fiorucci, Franziska Heidemann, Eike Sebastian Debus, Tilo Kölbel
PURPOSE: To describe the technical aspects and early results of the Candy-Plug technique for endovascular false lumen occlusion in chronic aortic dissection. METHODS: A retrospective single-center study analyzing 18 consecutive patients (mean age 63 years, range 44-76; 16 men) with thoracic false lumen aneurysm in chronic aortic dissection. All patients underwent thoracic endovascular aortic repair with false lumen occlusion using the Candy-Plug technique. Primary endpoints consisted of technical success (successful deployment) and clinical success (no false lumen backflow)...
May 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28485759/val-av-oar-eller-evar-vid-buk%C3%A2-aorta%C3%A2-aneurysm-%C3%A3-r-inte-givet-randomiserade-studier-har-utv%C3%A3-rderat-%C3%A3-ppen-och-endovaskul%C3%A3-r-kirurgi-%C3%A2-ingen-av-metoderna-%C3%A3-r-i-allt-%C3%A3-verl%C3%A3-gsen-den-andra
#19
Fredrik Lundgren
Endovascular or open surgery for elective abdominal aortic surgery? Evidence from the 5 randomized trials OAR (open aortic repair) can be demanding for fragile patients, but has good long-term durability. EVAR (endovascular aortic repair) is more lenient, but is associated with life-long controls, more life-threatening reinterventions, a remaining threat of rupture and a possibly increased risk of death by cancer. All patients with an AAA (abdominal aortic aneurysm) must recieve a thorough evaluation of medical risk and expected survival before open/endovascular treatment and a discussion of the short- and long-term risks of the different treatment alternatives...
May 8, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28483617/a-steerable-sheath-to-deploy-hypogastric-bridging-stent-by-contralateral-femoral-approach-in-an-iliac-branch-procedure-after-evar
#20
Ciro Ferrer, Luigi Venturini, Raffaele Grande, Katia Raccagni, Luca Ginanni Corradini, Mario Corona, Luca di Marzo
Aneurysmal degeneration of distal landing zones after endovascular aneurysm repair (EVAR), can be a potential cause of late failure of this technique. Aneurysmal degeneration of common iliac arteries increases the risk of rupture of the iliac aneurysm itself as well as of the abdominal aortic aneurysm (AAA) owing to aneurysm's reperfusion as a type Ib endoleak. Reoperation consists in plugging and covering the internal iliac artery (IIA), by extension into the external iliac artery, or preservation of antegrade flow in IIA by iliac branch devices (IBD) or sandwich technique...
May 5, 2017: Annals of Vascular Surgery
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