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https://www.readbyqxmd.com/read/28527353/mechanical-behavior-of-the-abdominal-aortic-aneurysm-assessed-by-biaxial-tests-in-the-rat-xenograft-model
#1
Louise Marais, Mustapha Zidi
This paper addresses the mechanical biaxial behavior of degraded arteries obtained by the rat xenograft model. For that, a pressure myograph was used to perform extension-inflation tests on abdominal aortic aneurysms (AAAs). Furthermore, residual stresses in the aneurismal wall were assessed by opening angle tests. Thus, the changes in mechanical behavior between native murine aortas, decellularized guinea pig aortas (the grafts) and degraded aortas (AAAs) were investigated. It was shown that decellularized and degraded aortas exhibited a different mechanical behavior than native murine aortas...
May 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28526756/restricted-intra-embryonic-origin-of-bona-fide-hematopoietic-stem-cells-in-the-chicken
#2
Laurent Yvernogeau, Catherine Robin
Hematopoietic stem cells (HSCs), responsible for blood cell production, are generated during embryonic development. Human and chicken embryos share features that pose the chicken as a reliable and accessible alternative model to study developmental hematopoiesis. However, the existence of HSCs has never been formally proven in chicken embryos. Here, we established a complete cartography and quantification of hematopoietic cells in the aorta during development. We demonstrated the existence of bona fide HSCs, originating from the chicken embryo aorta (and not the yolk sac, allantois or head), through an in vivo transplantation assay...
May 19, 2017: Development
https://www.readbyqxmd.com/read/28526040/catching-a-floating-thrombus-a-case-report-on-the-treatment-of-a-large-thrombus-in-the-ascending-aorta
#3
Gijs Eduard de Maat, Giorgio Vigano, Massimo Alessandro Mariani, Ehsan Natour
BACKGROUND: The ascending aorta is an uncommon site for non-infective thrombus. In non-aneurysmal and non-atherosclerotic vessels this condition becomes extremely rare, while it represents a source of potential cerebral and peripheral embolic events. Currently, there is no consensus in the guidelines on how to treat a free floating thrombus in ascending aorta, therefore we present our decision making process and therapeutic strategy. CASE PRESENTATION: A healthy 48-year-old man was hospital admitted with acute abdominal pain...
May 19, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28525608/surgical-resection-for-advanced-lung-cancer-using-the-hemi-clamshell-approach
#4
Yasushi Shintani, Ryu Kanzaki, Tomohiro Kawamura, Soichiro Funaki, Masato Minami, Meinoshin Okumura, Eiji Okura, Yoshihisa Kadota, Mitsunori Ohta
OBJECTIVES: The hemi-clamshell (HCS) approach consists of partial sternotomy with antero-lateral thoracotomy. This study evaluated the utilities and outcomes of the HCS approach in advanced lung cancer patients. METHODS: We retrospectively investigated 45 patients who underwent surgery for advanced lung cancer via the HCS procedure between 2000 and 2014, the indications for surgery being tumour invasion extending to the aorta arch in 5, descending aorta in 9, main pulmonary artery in 5, superior vena cava in 6, right or left atrium in 4, apical thoracic dome in 7 patients and mediastinal lymphadenopathy for left-sided lung cancer in 12...
May 19, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28525553/evaluation-of-conventional-and-frozen-elephant-trunk-techniques-on-spinal-cord-blood-flow-in-an-animal-model%C3%A2
#5
Sergey Leontyev, Maja-Theresa Dieterlen, Michelle Halling, Franziska Schlegel, Alexandro Hoyer, Susann Ossmann, Kerstin Klaeske, Christian D Etz, Friedrich W Mohr
OBJECTIVES: The treatment of patients with extensive thoracic aortic disease involving the arch and descending aorta is often performed using the frozen elephant trunk technique (FET). Spinal cord blood flow (SCBF) in cervical, thoracic and lumbar sections prior, during and after aortic arch surgery were compared in conventional elephant trunk (cET) and FET technique in a pig model. METHODS: German Landrace pigs (75-85 kg) underwent aortic arch surgery using the FET ( n  = 8) or cET ( n  = 8) techniques...
May 18, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28525548/computational-fluid-dynamics-characterization-of-pulsatile-flow-in-central-and-sano-shunts-connected-to-the-pulmonary-arteries-importance-of-graft-angulation-on-shear-stress-induced-platelet-mediated-thrombosis
#6
Robert Ascuitto, Nancy Ross-Ascuitto, Martin Guillot, Carey Celestin
OBJECTIVES: Central (aorta) and Sano (right ventricle)-to-pulmonary artery (PA) shunts, palliative operations for infants with complex heart defects, can develop life-threatening thrombosis. We employed computational fluid dynamics (CFD) to study pulsatile flow in these shunts, with the goal to identify haemodynamic characteristics conducive to thrombus formation. METHODS: CFD, using the finite volume method with cardiac catheterization data, and computer simulations, based on angiography, were employed to determine flow-velocity field, wall shear stress (WSS) profile and oscillatory shear index (OSI)...
May 19, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28525515/lidocaine-prevents-oxidative-stress-induced-endothelial-dysfunction-of-the-systemic-artery-in-rats-with-intermittent-periodontal-inflammation
#7
Takumi Saito, Yasuhiro Yamamoto, Guo-Gang Feng, Yoshiaki Kazaoka, Yoshihiro Fujiwara, Hiroyuki Kinoshita
BACKGROUND: Periodontal inflammation causes endothelial dysfunction of the systemic artery. However, it is unknown whether the use of local anesthetics during painful dental procedures alleviates periodontal inflammation and systemic endothelial function. This study was designed to examine whether the gingival or systemic injection of lidocaine prevents oxidative stress-induced endothelial dysfunction of the systemic artery in rats with intermittent periodontal inflammation caused by lipopolysaccharides (LPS)...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28524872/hif-1%C3%AE-regulates-macrophage-endothelial-interactions-during-blood-vessel-development-in-zebrafish
#8
Claudia Gerri, Rubén Marín-Juez, Michele Marass, Alora Marks, Hans-Martin Maischein, Didier Y R Stainier
Macrophages are known to interact with endothelial cells during developmental and pathological angiogenesis but the molecular mechanisms modulating these interactions remain unclear. Here, we show a role for the Hif-1α transcription factor in this cellular communication. We generated hif-1aa;hif-1ab double mutants in zebrafish, hereafter referred to as hif-1α mutants, and find that they exhibit impaired macrophage mobilization from the aorta-gonad-mesonephros (AGM) region as well as angiogenic defects and defective vascular repair...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28523430/long-term-durability-of-preserved-aortic-root-after-repair-of-acute-type-a-aortic-dissection
#9
Keiji Kamohara, Shugo Koga, Jun Takaki, Nozomi Yoshida, Kojiro Furukawa, Shigeki Morita
BACKGROUND: Optimal management of aortic root in type A aortic dissection (AAD) is controversial. To determine the most appropriate strategy, we studied the late outcomes after conservative repair of aortic root. METHODS: 234 AAD patients (mean age 68 ± 12 years) underwent surgical repair using supracommissural replacement (SCR) for aortic root reconstruction from 1989 to 2014. Ascending aortic replacement or hemi-arch replacement was performed in 180 patients (non-arch group), whereas total arch replacement (TAR) was performed in 54 patients...
May 18, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28523342/exercise-capacity-before-and-after-stent-placement-for-coarctation-of-the-aorta-a-single-center-case-series
#10
Brandon D Morrical, Jason H Anderson, Nathaniel W Taggart
Over the last 15 years, stent placement has become a viable and safe alternative to surgical repair for native and recurrent coarctation of the aorta. Although patients with coarctation of the aorta often have lower exercise tolerance, there is no published data regarding the effect of coarctation stenting on exercise capacity. We aimed to determine the effect of coarctation stent placement on exercise capacity. We conducted a retrospective chart review of all patients who underwent stent placement for native or recurrent coarctation of the aorta at our institution from January 2000 to October 2012...
May 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28523333/giant-cell-arteritis-with-arteritic-anterior-ischemic-optic-neuropathy
#11
Horia Tudor Stanca, Elena Suvac, Mihnea Munteanu, Dragoş Cătălin Jianu, Andrei Gheorghe Marius Motoc, Gavril Cosmin Roşca, Ovidiu Boruga
Giant cell arteritis (GCA) is an inflammatory vasculitis of unknown etiology that mainly involves large and medium arteries, particularly the cranial branches of the aorta. GCA with consecutive arteritic-anterior ischemic optic neuropathy (A-AION) has rarely been diagnosed in Romania. Recently, we encountered an 83-year-old patient who presented with left eye visual impairment and corresponding optic disc diffusely swollen and pale. He also had typical manifestations of GCA, such as malaise, and temporal headache, and a highly elevated erythrocyte sedimentation rate and C-reactive protein level...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28521674/sorbitane-monostearate-and-cholesterol-based-niosomes-for-oral-delivery-of-telmisartan-from-bench-to-preclinical-implementation-in-wistar-albino-rats
#12
Abdul Ahad, Mohammad Raish, Fahad I Al-Jenoobi, Abdullah M Al-Mohizea
BACKGROUND: Niosomes are non-ionic surfactant vesicles used as drug carriers for encapsulating both hydrophobic and hydrophilic drugs. The aim of the present study was to prepare and characterize niosomes formulations for oral delivery of telmisartan and evaluated for its antihypertensive activity. METHOD: Telmisartan loaded niosomes were prepared using thin film hydration method by varying the Span 60 and cholesterol at several molar ratios and characterized for vesicles size, polydispersity index, zeta potential, entrapment efficiency...
May 18, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28521602/dynamic-alterations-in-cerebral-celiac-and-renal-flows-resulting-from-ascending-aorta-subclavian-artery-and-femoral-artery-cannulations-of-extracorporeal-devices
#13
Sahin Iscan, Habib Cakir, Bortecin Eygi, Ismail Yurekli, Koksal Donmez, Pınar Unde Ayvat, Derya Sarıkaya Pekel, Mert Kestelli
INTRODUCTION: The aim of this study was to assess the relationships among cardiac output, extracorporeal blood flow, cannulation site, right (RCa) and left carotid (LCa), celiac (Ca) and renal artery (Ra) flows during extracorporeal circulation. METHODS: A mock circulatory circuit was assembled, based on a compliant anatomical aortic model. The ascending aorta, right subclavian and femoral artery cannulations were created and flow was provided by a centrifugal pump (Cp); cardiac output was provided by a roller pump (Rp)...
May 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28521476/differentiation-between-gastrointestinal-schwannomas-and-gastrointestinal-stromal-tumors-by-computed-tomography
#14
Ming-Yan He, Rong Zhang, Zhenpeng Peng, Yin Li, Ling Xu, Mengjie Jiang, Zi-Ping Li, Shi-Ting Feng
The aim of the present study was to identify computed tomography (CT) features to assist in differentiating gastrointestinal schwannomas from gastrointestinal stromal tumors (GISTs). CT images of gastrointestinal schwannomas (n=15) and GISTs (n=50) were analyzed. The absolute CT values of tumor/aorta during plain scan/arterial phase/venous phase were recorded as tumor plain scan (Tp)/aorta plain scan (Ap), tumor arterial phase (Ta)/aorta arterial phase (Aa) and tumor venous phase (Tv)/aorta venous phase (Av), respectively, and normalized CT values of the three phases were calculated as Sp=Tp/Ap, Sa=Ta/Aa and Sv=Tv/Av, respectively...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521185/association-of-aortic-perivascular-adipose-tissue-density-with-aortic-calcification-in-women-with-systemic-lupus-erythematosus
#15
Kelly J Shields, Samar R El Khoudary, Joseph M Ahearn, Susan Manzi
BACKGROUND AND AIMS: Women with systemic lupus erythematosus (SLE) have an increased risk of cardiovascular disease (CVD). Perivascular adipose tissue (PVAT) surrounds the vascular wall, is associated with CVD risk factors, and may contribute to premature CVD in SLE. We previously found greater volumes of aortic PVAT associated with aortic calcification (AC) in female SLE patients. There is recent evidence that not only volume but adipose density may also be indicative of inflammation...
April 29, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28520843/measurement-of-aortic-pulse-wave-velocity-with-a-connected-bathroom-scale
#16
David Campo, Hakim Khettab, Roger Yu, Nicolas Genain, Paul Edouard, Nadine Buard, Pierre Boutouyrie
BACKGROUND: Measurement of arterial stiffness should be more available. Our aim was to show that aortic pulse wave velocity can be reliably measured with a bathroom scale combining the principles of ballistocardiography (BCG) and impedance plethysmography on a single foot. METHOD: The calibration of the bathroom scale was conducted on a group of 106 individuals. The aortic pulse wave velocity was measured with the SphygmoCor in the supine position. Three consecutive measurements were then performed on the Withings scale in the standing position...
May 17, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28520685/pelvic-fracture-pattern-predicts-the-need-for-hemorrhage-control-intervention-results-of-an-aast-multi-institutional-study
#17
Todd W Costantini, Raul Coimbra, John B Holcomb, Jeanette M Podbielski, Richard D Catalano, Allie Blackburn, Thomas M Scalea, Deborah M Stein, Lashonda Williams, Joseph Conflitti, Scott Keeney, Christy Hoey, Tianhua Zhou, Jason Sperry, Dimitra Skiada, Kenji Inaba, Brian H Williams, Joseph P Minei, Alicia Privette, Robert C Mackersie, Brenton R Robinson, Forrest O Moore
BACKGROUND: Early identification of patients with pelvic fractures at risk of severe bleeding requiring intervention is critical. We performed a multi-institutional study to test our hypothesis that pelvic fracture patterns predict the need for a pelvic hemorrhage control intervention. METHODS: This prospective, observational, multicenter study enrolled patients with pelvic fracture due to blunt trauma. Inclusion criteria included shock on admission (systolic blood pressure <90 mm Hg or heart rate >120 beats/min and base deficit >5, and the ability to review pelvic imaging)...
June 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28520538/treatment-strategies-for-paradoxical-hypertension-following-surgical-correction-of-coarctation-of-the-aorta-in-children
#18
Peter P Roeleveld, Eline G Zwijsen
BACKGROUND: Paradoxical hypertension after repair of coarctation of the aorta is a well-known phenomenon. The pathogenesis involves the activation of the sympathetic nervous system (first phase) and renin-angiotensin system (second phase). Only a limited number of different treatment strategies have been published in the literature, without any comparative studies. METHODS: Our aim was to describe the current international practice variation surrounding pharmacological treatment currently being employed to treat paradoxical hypertension following the repair of coarctation of the aorta in children...
May 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28520537/anomalous-origin-of-right-coronary-artery-from-left-coronary-sinus-13-cases-treated-with-the-reimplantation-technique
#19
Alain Cubero, Alejandro Crespo, Gadah Hamzeh, Andrés Cortes, Daniel Rivas, José Ignacio Aramendi
OBJECTIVES: Anomalous aortic origin of a coronary artery is uncommon but potentially clinically significant. Manifestations vary from asymptomatic patients to those who present with angina pectoris, myocardial infarction, heart failure, syncope, arrhythmias, and sudden death. We describe our experience with surgical reimplantation and results at midterm follow-up. METHODS: Between February 2003 and July 2016, a total of 13 patients with anomalous origin of the right coronary artery (RCA) from the left sinus underwent surgical reimplantation...
May 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28520220/endothelial-damage-effects-of-circulating-microparticles-from-patients-with-stable-angina-is-reduced-by-aspirin-though-erk-p38-mapks-pathways
#20
Cheng Gong, Xue-Feng Shan, Xu-Lang Wang, Wei-Wei Dong, Zhe Li, D Xin-Hong Liu, Wei Zhang, Kun Xing, Feng-Jun Chang
INTRODUCTION: Platelet activation participate in the development of both coronary artery disease (CAD) and circulating microparticles (MPs). As a commonly used medicine for coronary heart disease, whether aspirin affects the function of MPs remains unclear. AIMS: This study was designed to test MPs from healthy subjects, stable angina (SA) patients before and after aspirin administration were obtained. MPs origins were tested by flow cytometry. Rat thoracic aortas were incubated with MPs (with or without aspirin) to determine the effects of MPs on expression of ERK1/2, JNKs and p38 MAPK...
May 18, 2017: Cardiovascular Therapeutics
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