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https://www.readbyqxmd.com/read/28532901/long-term-surveillance-of-zinc-implant-in-murine-artery-surprisingly-steady-biocorrosion-rate
#1
Adam Drelich, Shan Zhao, Roger J Guillory, Jaroslaw W Drelich, Jeremy Goldman
Metallic zinc implanted into the abdominal aorta of rats out to 6 months has been demonstrated to degrade while avoiding responses commonly associated with the restenosis of vascular implants. However, major questions remain regarding whether a zinc implant would ultimately passivate through the production of stable corrosion products or via a cell mediated fibrous encapsulation process that prevents the diffusion of critical reactants and products at the metal surface. Here, we have conducted clinically relevant long term in vivo studies in order to characterize late stage zinc implant biocorrosion behavior and products to address these critical questions...
May 19, 2017: Acta Biomaterialia
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/28528045/endovascular-fenestration-for-distal-aortic-sealing-after-frozen-elephant-trunk-with-thoraflex
#3
Randolph H L Wong, Peter S Y Yu, Micky W T Kwok, Simon C Y Chow, Jacky Y K Ho, Malcolm J Underwood, Simon C H Yu
We describe a case of total arch replacement with frozen elephant trunk for chronic type B aortic dissecting aneurysm, which resulted in inadvertent landing of the frozen elephant trunk into the false lumen. A radiofrequency puncture system-assisted controlled endovascular fenestration of the dissection flap was performed at the upper abdominal aorta and subsequent thoracic endovascular stenting, successfully redirecting the blood flow from the false to the true lumen. Our case illustrated a possible way to seal distal reentry in chronic type B aortic dissection...
June 2017: Annals of Thoracic 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/28527353/mechanical-behavior-of-the-abdominal-aortic-aneurysm-assessed-by-biaxial-tests-in-the-rat-xenograft-model
#5
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/28526040/catching-a-floating-thrombus-a-case-report-on-the-treatment-of-a-large-thrombus-in-the-ascending-aorta
#6
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/28521602/dynamic-alterations-in-cerebral-celiac-and-renal-flows-resulting-from-ascending-aorta-subclavian-artery-and-femoral-artery-cannulations-of-extracorporeal-devices
#7
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/28516090/lower-aorto-iliac-bifurcation-position-and-incident-cardiovascular-disease-a-multi-ethnic-study-of-atherosclerosis-mesa
#8
Nketi I Forbang, Matthew A Allison, Michael H Criqui
BACKGROUND: With increasing age, a downward shift of the aorto-iliac bifurcation relative to the lumbar spine occurs. A lower bifurcation position is an independent marker for adverse vascular aging and is associated with increased burden of cardiovascular disease (CVD) risk factors; however, the associations between lower bifurcation position and CVD events remain unknown. METHODS: Abdominal computed tomography scans were used to measure the aorto-iliac bifurcation distance (AIBD, distance from the aorto-iliac bifurcation to the L5/S1 disc space)...
October 2016: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28514377/-iliac-arteries-and-aortic-repair-in-patients-with-retroperitoneal-sarcoma
#9
I S Stilidi, M G Abgaryan, M P Nikulin, A E Kalinin
AIM: To evaluate the results of surgical treatment in patients with retroperitoneal sarcoma and invasion into great vessels. MATERIAL AND METHODS: For the period 2009-2016 fourteenth patients with retroperitoneal sarcoma underwent resection and repair of great vessels at the abdominal department of N.N. Blokhin Russian Cancer Research Center. In 12 cases circular resection of infrarenal aorta, aortic bifurcation and iliac arteries followed by their replacement was made...
2017: Khirurgiia
https://www.readbyqxmd.com/read/28507910/penile-calciphylaxis-the-use-of-radiological-investigations-in-the-management-of-a-rare-and-challenging-condition
#10
Rebecca A Campbell, Laith M Alzweri, Nikolai A Sopko, Katarzyna J Macura, Arthur L Burnett
Penile calciphylaxis is a rare phenomenon of penile necrosis observed in patients with hemodialysis-dependent end-stage renal failure. Multiple treatments have been proposed including conservative management, surgical debridement and penectomy; yet, the prognosis remains extremely poor. Here, we describe a patient with protracted resolution of dry gangrene of the glans, which failed conservative management of wound care and pain management. Radiological studies revealed extensive calcification of abdominal aorta and branching vessels including the penile arteries...
July 2017: Urology Case Reports
https://www.readbyqxmd.com/read/28503707/the-value-of-ultrasound-in-diagnosing-extracranial-large-vessel-vasculitis-compared-to-fdg-pet-ct-a-retrospective-study
#11
Christian Löffler, Johannes Hoffend, Urs Benck, Bernhard K Krämer, Raoul Bergner
Large-vessel vasculitis (LVV) is a group of diseases mainly comprised of giant-cell arteritis (GCA), Takayasu arteritis, and a series of rare diseases like Behçet's disease, IgG4-related disease, infectious aortitis, and other unfrequent entities. Besides clinical and laboratory features, Doppler sonography (DS) can assist in establishing the diagnosis. Its diagnostic sensitivity has been evaluated in various studies, most of them, however, in temporal arteritis (TA) respectively in LVV with involvement of the temporal artery...
May 15, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28500595/use-of-a-fluorescent-substrate-to-measure-ace2-activity-in-the-mouse-abdominal-aorta
#12
Yu Wang, Lisa A Cassis, Sean E Thatcher
The use of fluorogenic substrates to measure enzymatic activity is widely used to understand function within different experimental models. ACE2 is important in understanding the balance between AngII and Ang-(1-7) and how this balance could then in turn influence hypertension or other disease outcomes. Here, we describe a method to measure ACE2 activity in abdominal aorta of hyperlipidemic mice under both saline and AngII infusion.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28500497/evaluation-of-endothelialization-in-the-center-part-of-graft-using-3%C3%A2-cm-vascular-grafts-implanted-in-the-abdominal-aortae-of-the-rat
#13
Toshiharu Fukayama, Yusuke Ozai, Haruka Shimokawatoko, Yusuke Kimura, Derya Aytemiz, Ryou Tanaka, Noboru Machida, Tetsuo Asakura
In order to develop small-diameter vascular grafts, it is necessary to evaluate endothelialization, especially, in the center part at early stage. For implantation of vascular grafts of 1 cm in length to abdominal aortae of rat, endothelial cells can be formed easily by stretching anastomosis. We evaluated the endothelialization in the center part of vascular grafts by implanting vascular grafts using transgenic (TG) silk fibroin (SF) of 3 cm in length. Vascular grafts were prepared 1.5 mm in diameter and 1 and 3 cm in length using wild type (WT) SF and TG SF by braiding structure, respectively...
May 12, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28500378/intravascular-ultrasound-elastography-analysis-of-the-elastic-mechanical-properties-of-atherosclerotic-plaque
#14
Zhaohuan Li, Lin Wang, Xiaobo Hu, Pengfei Zhang, Yifei Chen, Xinxin Liu, Mingjun Xu, Haijun Su, Mei Zhang
To assess the elastic mechanical properties of atherosclerotic plaque with different morphological properties by intravascular ultrasound elastography (IVUSE). 30 purebred New Zealand rabbits were fed a high-cholesterol diet; the abdominal aorta endothelium was balloon-injured after 2 weeks; at week 12, 2 plaques with moderate echo from each rabbit were chosen for in situ imaging, and 2 consecutive frames near the end-diastole images in situ were used to construct an IVUS elastogram. Shear strain (SS) and area strain (AS) were greater for eccentric than centripetal plaque (SS: 2...
May 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28499654/hybrid-extracorporeal-membrane-oxygenation-using-avalon-elite-double-lumen-cannula-ensures-adequate-heart-brain-oxygen-supply
#15
Ju Zhao, Dongfang Wang, Cherry Ballard-Croft, Jingkun Wang, Po-Lin Hsu, Matthew Bacchetta, Joseph B Zwischenberger
BACKGROUND: Differential hypoxia exists in peripheral venoarterial (VA) extracorporeal membrane oxygenation (ECMO) patients with compromised lungs, causing hypoxic damage to heart or brain. We proposed an Avalon Elite (Maquet, Rastatt, Germany) double lumen cannula-based hybrid ECMO to add a venovenous (VV) blood flow into the pulmonary circulation onto the existing VA ECMO circuit to increase oxygen saturation in the left ventricle and ascending aorta, mitigating heart/brain hypoxia...
May 9, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28498910/extra-anatomical-bypass-in-complex-and-recurrent-aortic-coarctation-and-hypoplastic-arch%C3%A2
#16
Eva Maria Delmo Walter, Mariano Francisco Del Maria Javier, Roland Hetzer
OBJECTIVES: Our goal was to report the selection schemes, technical variations and long-term outcome of extra-anatomical bypass to correct complex, recurrent aortic coarctation and hypoplastic aortic arch. METHODS: Between 1989 and 2012, 53 patients (mean age 13.2 ± 4.3, median 11.6, range 9-23 years) with complex aortic coarctation ( n  = 33; long-segment hypoplastic aortic arch in 15), recurrent coarctation ( n  = 20; anastomosic pseudoaneurysm in 10), underwent correction using extra-anatomical bypass, either with ( n  = 18: femoral bypass = 13, left heart bypass = 5) or without ( n  = 35) extracorporeal circulation via a left lateral thoracotomy ( n = 48) and combined median sternotomy and median laparotomy ( n  = 5)...
May 11, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28496085/-graft-pseudoaneurysm-after-ascending-to-abdominal-aorta-bypass-for-atypical-coarctation-due-to-aortitis-syndrome-report-of-a-case
#17
Masashi Yada, Kazuo Yamanaka, Senri Miwa, Keiichi Hirose, Hisashi Sakaguchi, Yukiyo Yoshida, Youhei Onga, Yuichi Tara
We present a case of a 44-year-old woman, with pseudoaneurysm formation at the middle of the prosthetic graft, 60 mm in diameter. She had been diagnosed with atypical coarctation due to aortitis 27 years before, and had undergone a bypass operation with 14 mm-diameter Cooley double velour graft from the ascending aorta to the abdominal aorta. This time, endovascular aortic repair was performed to prevent rupture of the pseudoaneurysm. Though a knitted Dacron graft has a risk of psuedaneurysm formation long patency could be obtained when used in ascending aorta-abdominal aorta bypass...
May 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28493070/quality-of-routine-diagnostic-abdominal-images-generated-from-a-novel-detector-based-spectral-ct-scanner-a-technical-report-on-a-phantom-and-clinical-study
#18
Mojgan Hojjati, Steven Van Hedent, Negin Rassouli, Curtis Tatsuoka, David Jordan, Amar Dhanantwari, Prabhakar Rajiah
PURPOSE: To evaluate the image quality of routine diagnostic images generated from a novel detector-based spectral detector CT (SDCT) and compare it with CT images obtained from a conventional scanner with an energy-integrating detector (Brilliance iCT), Routine diagnostic (conventional/polyenergetic) images are non-material-specific images that resemble single-energy images obtained at the same radiation, METHODS: ACR guideline-based phantom evaluations were performed on both SDCT and iCT for CT adult body protocol...
May 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28491182/aortoenteric-fistulae-temporization-and-treatment-lessons-learned-from-a-multidisciplinary-approach-to-3-patients
#19
Jeffrey Forris Beecham Chick, Jordan C Castle, Kyle J Cooper, Ravi N Srinivasa, Jonathan L Eliason, Nicholas H Osborne, Karen M Kim, Wael E Saad, Minhaj S Khaja
Aortoenteric fistulae are life-threatening conditions characterized by abnormal communications between the aorta and gastrointestinal tract. Aortoenteric fistulae may be characterized by the triad of bleeding, abdominal pain, or a pulsatile abdominal mass. Although hemorrhage is the most common presentation, it does not always occur; thus, patients may present with nonspecific symptoms. Computed tomography angiography findings suggestive of aortoenteric fistulae include ectopic gas within or adjacent to the aorta, discontinuity of the aortic wall, bowel wall thickening, and extravasation of contrast into the bowel...
June 2017: Radiology case reports
https://www.readbyqxmd.com/read/28487986/sumo-1-delays-neuronal-damage-in-the-spinal-cord-following-ischemia-reperfusion
#20
Hyo Young Jung, Dae Won Kim, Hyun Jung Kwon, Dae Young Yoo, In Koo Hwang, Moo-Ho Won, Tack-Geun Cho, Soo Young Choi, Seung Myung Moon
The present study investigated the protective effects of small ubiquitin-like modifier 1 (SUMO-1) on spinal cord ischemic damage in rabbits. A trans‑activator of transcription (Tat)‑SUMO‑1 fusion protein was prepared, and transient spinal cord ischemia was induced by occlusion of the abdominal aorta for 15 min. Vehicle (glycerol) or 1 mg/kg Tat-1-SUMO‑1 was administered intraperitoneally to the rabbits immediately following ischemia/reperfusion. Administration of Tat-SUMO-1 did not lead to significant alterations in arterial blood gases [partial pressure (Pa)CO2 and PaO2], pH, or blood glucose levels prior to ischemia, 10 min after occlusion or 10 min after reperfusion...
June 2017: Molecular Medicine Reports
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