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https://www.readbyqxmd.com/read/29782425/increased-arterial-stiffness-in-a-cohort-of-pediatric-takayasu-arteritis-patients-in-toronto-adversely-affects-left-ventricular-mechanics
#1
Heynric B Grotenhuis, Florence A Aeschlimann, Wei Hui, Cameron Slorach, Rae S M Yeung, Susanne M Benseler, Timothy J Bradley, Lars Grosse-Wortmann
BACKGROUND/OBJECTIVE: Takayasu arteritis (TA) is characterized by extensive aortic, large and midsize arterial wall inflammation. The aim of this study was to assess the morphological and elastic properties of the aorta and large arteries and the impact on left ventricular (LV) mechanics in children with TA. METHODS: Seven pediatric TA patients (6 female patients, 13.8 ± 3.2 years) were assessed with magnetic resonance imaging, vascular ultrasound, applanation tonometry, and echocardiography from February 2015 until July 2017 and compared with 7 age- and sex-matched controls...
May 19, 2018: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/29780288/the-assessment-of-carbon-dioxide-automated-angiography-in-type-ii-endoleaks-detection-comparison-with-contrast-enhanced-ultrasound
#2
Chiara Mascoli, Gianluca Faggioli, Enrico Gallitto, Vincenzo Vento, Giuseppe Indelicato, Rodolfo Pini, Andrea Vacirca, Andrea Stella, Mauro Gargiulo
Introduction: Iodinated contrast media completion angiography (ICM-A) may underestimate the presence of type II endoleak (ELII) after endovascular aortic repair (EVAR), particularly if they are at low flow. Contrast-enhanced ultrasound (CEUS) has been proposed as the gold standard in ELII detection during EVAR follow-up. Intraprocedural carbon dioxide (CO2 ) angiography has been shown to be useful in this setting; however no comparative studies including these three techniques are currently available...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29777851/point-of-care-ultrasound-performed-by-a-medical-student-compared-to-physical-examination-by-vascular-surgeons-in-the-detection-of-abdominal-aortic-aneurysms
#3
Trinh Mai, Michael Y Woo, Kim Boles, Prasad Jetty
OBJECTIVE: To determine the test characteristics of point-of-care ultrasonography performed by a medical student versus physical examination by vascular surgeons compared to a gold standard reference scan for the detection of abdominal aortic aneurysms. METHODS: We conducted a prospective, observer-blinded study recruiting patients from an outpatient vascular surgery clinic. Participants were screened for abdominal aortic aneurysms by standardized physical examination by a blinded vascular surgeon, followed by a point-of-care ultrasound examination by a blinded medical student...
May 16, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29775449/-dodatkowa-t%C3%A4-tnica-nerkowa-przyczyn%C3%A4-skrajnego-wodonercza-u-5-letniego-ch%C3%A5-opca
#4
Grażyna Krzemień, Jarosław Sołtyski, Agnieszka Szmigielska, Stanisław Warchoł, Teresa Dudek-Warchoł, Aleksandra Jakimów-Kostrzewa
Hydronephrosis in children is most often due to an intrinsic ureteropelvic junction obstruction or by compression on ureter by accessory renal artery coming from the aorta to the lower pole of the kidney. AIM: The aim of study was to present a case with a late onset of hydronephrosis caused by accessory renal artery. CASE REPORT: 5-year old boy with a mild pyelectasia during first 10 months of age was admitted to hospital because of abdominal pain and vomiting. Abdominal ultrasound revealed a marked dilatation of the right pelvicalyceal system with renal pelvis measuring 23 mm in anterior-posterior (ap) diameter, enlargement of calyces to 10 mm and narrowed cortex to 5 mm...
April 23, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29765694/development-of-an-intravascular-ultrasound-elastography-based-on-a-dual-element-transducer
#5
Cho-Chiang Shih, Pei-Yu Chen, Teng Ma, Qifa Zhou, K Kirk Shung, Chih-Chung Huang
The ability to measure the elastic properties of plaques and vessels would be useful in clinical diagnoses, particularly for detecting a vulnerable plaque. This study demonstrates the feasibility of the combination of intravascular ultrasound (IVUS) and acoustic radiation force elasticity imaging for detecting the distribution of stiffness within atherosclerotic arteries ex vivo . A dual-frequency IVUS transducer with two elements was used to induce the propagation of the shear wave (by the 8.5 MHz pushing element) which could be simultaneously monitored by the 31 MHz imaging element...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29755101/-outcome-of-surgical-treatment-of-locally-advanced-lung-cancer-after-induction-chemoradiotherapy
#6
Masayuki Tanahashi, Haruhiro Yukiue, Eriko Suzuki, Naoko Yoshii, Shinsuke Kitazawa, Yasunori Kaminuma, Hiroshi Niwa
OBJECTIVE: The outcome of surgical treatment of non-small-cell lung cancer after induction chemoradiotherapy was investigated. SUBJECTS: The subjects were 74 patients with non-small-cell lung cancer who received induction chemoradiotherapy( ICRT) between 1998 and 2016. ICRT was administered to pT3 lung cancer invading the chest wall(20 patients), pT4 lung cancer invading the adjacent organ(22 patients), and cN2 lung cancer(32 patients). cN2 was confirmed by mediastinoscopy(13 patients) and endobronchial ultrasound-guided transbronchial needle aspiration(EBUS-TBNA)(19 patients)...
April 2018: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/29743525/design-characterization-and-in-vivo-performance-of-synthetic-2-mm-diameter-vessel-grafts-made-of-pva-gelatin-blends
#7
M Atlan, T Simon-Yarza, J M Ino, V Hunsinger, L Corté, P Ou, R Aid-Launais, M Chaouat, D Letourneur
Since the development of the first vascular grafts, fabrication of vessel replacements with diameters smaller than 6 mm remains a challenge. The present work aimed to develop PVA (poly (vinyl alcohol))-gelatin hybrids as tubes suitable for replacement of very small vessels and to evaluate their performance using a rat abdominal aorta interposition model. PVA-gelatin hybrid tubes with internal and external diameters of 1.4 mm and 1.8 mm, respectively, composed of 4 different gelatin ratios were prepared using a one-step strategy with both chemical and physical crosslinking...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739309/performance-evaluation-of-adaptive-imaging-based-on-multiphase-apodization-with-cross-correlation-a-pilot-study-in-abdominal-ultrasound
#8
Junseob Shin, Yu Chen, Harshawn Malhi, Frank Chen, Jesse Yen
Degradation of image contrast caused by phase aberration, off-axis clutter, and reverberation clutter remains one of the most important problems in abdominal ultrasound imaging. Multiphase apodization with cross-correlation (MPAX) is a novel beamforming technique that enhances ultrasound image contrast by adaptively suppressing unwanted acoustic clutter. MPAX employs multiple pairs of complementary sinusoidal phase apodizations to intentionally introduce grating lobes that can be used to derive a weighting matrix, which mostly preserves the on-axis signals from tissue but reduces acoustic clutter contributions when multiplied with the beamformed radio-frequency (RF) signals...
May 1, 2018: Ultrasonic Imaging
https://www.readbyqxmd.com/read/29720205/retrograde-type-a-dissection-in-a-24th-gestational-week-pregnant-patient-the-importance-of-interdisciplinary-interaction-to-a-successful-outcome
#9
Jerry Easo, Michael Horst, Bernhard Schmuck, Rohit Philip Thomas, Steffen Saupe, Malte Book, Alexander Weymann
BACKGROUND: Type A Dissection in pregnancy is a devastating medical condition with 2 lives at stake and unclear strategy at early gestational stages. We describe a successful outcome, clearly dependent on the coordination of all involved disciplines. CASE PRESENTATION: This case history describes a 28 year old female with a 24th week pregnancy gravida 2 para 0 with a DeBakey Type I aortic dissection, diagnosed via ultrasound. Surgery was perfomed on the day of diagnosis...
May 2, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29706344/endovascular-removal-of-fractured-inferior-vena-cava-filter-fragments-5-year-registry-data-with-prospective-outcomes-on-retained-fragments
#10
Andrew J Kesselman, Nam Sao Hoang, Alexander Y Sheu, William T Kuo
PURPOSE: To evaluate the safety and efficacy of attempted percutaneous filter fragment removal during retrieval of fractured inferior vena cava (IVC) filters and to report outcomes associated with retained filter fragments. MATERIALS AND METHODS: Over a 5-year period, 82 consecutive patients presenting with a fractured IVC filter were prospectively enrolled into an institutional review board-approved registry. There were 27 men and 55 women (mean, 47 y; range, 19-85 y)...
April 26, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29703523/four-surgical-modifications-to-the-classic-elastase-perfusion-aneurysm-model-enable-haemodynamic-alterations-and-extended-elastase-perfusion
#11
Albert Busch, Ekaterina Chernogubova, Hong Jin, Felix Meurer, Hans-Henning Eckstein, Mia Kim, Lars Maegdefessel
OBJECTIVE/BACKGROUND: Abdominal aortic aneurysm (AAA) is an individual and socioeconomic burden in today's ageing society. Treatment relies on surgical exclusion of the dilated aorta by open or endovascular repair. For research purposes, animal models are necessary and the elastase induced aneurysm model closely mimics end stage human aneurysm disease. To improve the translational value of this model, four modifications to the classic elastase perfusion procedure (PPE) in relation to human aneurysm morphology were conducted...
April 24, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29665668/-application-of-lower-abdominal-aorta-balloon-occlusion-technique-by-ultrasound-guiding-during-caesarean-section-in-patients-with-pernicious-placenta-previa
#12
L C Wei, G Y Gong, J H Chen, P Y Hou, Q Y Li, Z Y Zheng, Y M Su, Y Zheng, C Z Luo, K Zhang, T F Xu, Y H Ye, Y J Lan, X M Wei
Objective: To discuss the feasibility, effect and safety of lower abdominal aorta balloon occlusion technique by ultrasound guiding during caesarean section in patients with pernicious placenta previa. Methods: The clinical data of 40 patients with pernicious placenta previa complicated with placenta accreta from January 2015 to August 2017 in Liuzhou workers hospital were analyzed retrospectively. The study group included 20 cases, which were operated in the way of cesarean section combined lower abdominal aorta balloon occlusion technique by ultrasound guiding, while the control group also included 20 cases, which were operated in the way of the conventional cesarean section without balloon occlusion technique...
March 27, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29618036/quantification-of-aortic-stiffness-and-wall-stress-in-healthy-volunteers-and-abdominal-aortic-aneurysm-patients-using-time-resolved-3d-ultrasound-a-comparison-study
#13
Emiel M J van Disseldorp, Niels J Petterson, Frans N van de Vosse, Marc R H M van Sambeek, Richard G P Lopata
Aims: Using non-invasive 3D ultrasound, peak wall stress (PWS) and aortic stiffness can be evaluated, which may provide additional criteria in abdominal aortic aneurysm (AAA) risk assessment. In this study, these measures were determined in both young and age-matched individuals, and AAA patients while its relation to age, maximum diameter, and growth was assessed statistically. Methods and results: Time-resolved 3D-US data were acquired for 30 volunteers and 65 AAA patients...
March 29, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29606152/bilateral-ureterolithiasis-a-true-positive-and-false-negative-pocus-exam-in-a-patient-with-renal-colic
#14
Matthew P Lowe, Christopher Cox
Acute flank pain from suspected urolithiasis is a common presenting complaint in the Emergency Department. Multiple computed tomography (CT) has traditionally been the standard imaging modality used to diagnose obstructive kidney stones, however point of care ultrasound (PoCUS) can play an important role in the diagnostic algorithm and risk stratification of acute flank pain. Here, we present the case of a 29-year-old female with suspected urolithiasis, who underwent PoCUS that revealed right-sided hydronephrosis and normal left kidney, bladder, and aorta...
April 2, 2018: CJEM
https://www.readbyqxmd.com/read/29605031/endovascular-creation-and-validation-of-acute-in-vivo-animal-model-for-type-a-aortic-dissection
#15
Mourad Boufi, Mathieu Claudel, Bianca Dona, Amina Djemli, Nicolas Branger, Stephane Berdah, Yves S Alimi
BACKGROUND: Animal modeling is a prerequisite for clinical transfer of new therapies. This study targets an acute in vivo animal model of type A dissection using endovascular approach with a view to test future stent grafts dedicated to this aortic segment. METHODS: Experiments were conducted on 13 swine. Two arterial accesses, femoral and percutaneous transapical, were required. Entry tear was created by endovascular instrumental means inserted through transapical access with either Outback catheter (group 1, n = 3) or EchoTip Endoscopic Ultrasound Needle (group 2, n = 10)...
May 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29588316/regulatory-cd4-t-cells-recognize-mhc-ii-restricted-peptide-epitopes-of-apolipoprotein-b
#16
Takayuki Kimura, Kouji Kobiyama, Holger Winkels, Kevin Tse, Jacqueline Miller, Melanie Vassallo, Dennis Wolf, Christian Ryden, Marco Orecchioni, Thamotharampillai Dileepan, Marc K Jenkins, Eddie A James, William W Kwok, David B Hanna, Robert C Kaplan, Howard D Strickler, Helen G Durkin, Seble G Kassaye, Roksana Karim, Phyllis C Tien, Alan L Landay, Stephen J Gange, John Sidney, Alessandro Sette, Klaus Ley
Background -CD4+ T cells play an important role in atherosclerosis, but their antigen specificity is poorly understood. Immunization with apolipoprotein B (ApoB, core protein of low density lipoprotein) is known to be atheroprotective in animal models. Here, we report on a human APOB peptide, p18, that is sequence-identical in mouse ApoB and binds to both mouse and human MHC-II. Methods -We constructed p18-tetramers to detect human and mouse APOB-specific T cells and assayed their phenotype by flow cytometry including CD4 lineage transcription factors, intracellular cytokines, and TCR activation...
March 27, 2018: Circulation
https://www.readbyqxmd.com/read/29582667/ultrasound-screening-for-abdominal-aortic-aneurysm-current-practice-challenges-and-controversies
#17
Ruth A Benson, Lewis Meecham, Owain Fisher, Ian M Loftus
Based on four major trials of aortic aneurysm screening from the UK, Denmark and Australia, the current UK screening programme began in 2009, and has now been expanded around the UK. Long term follow up of the original cohorts continues to demonstrate significant benefits in terms of AAA-related (OR: 0.66; 95% CI: 0.47-0.93; P =.02) and all-cause mortality (hazard ratio: 0.98; 95% confidence interval [CI]: 0.96-0.99; P = .003), and results from the first five years of the formal screening programme suggest similar success...
March 27, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29563748/merkel-cell-carcinoma
#18
Shravan Shanbhag, Amol Amonkar
Merkel cell carcinoma is a primary neuroendocrine tumour of the skin arising from the dermis and extending into the subcutis, occurring commonly in sun-exposed areas of the head and neck of the elderly. Clinically, non-specific erythematous or violaceous firm nodules or small plaques which may be surrounded by small adjacent satellite tumours are seen. Diagnosis of Merkel cell carcinoma is difficult by light microscopy alone and need of ancillary techniques like electron microscopy and immunohistochemistry may be necessary...
March 2018: Indian Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29548756/ultrasound-molecular-imaging-of-atherosclerosis-using-small-peptide-targeting-ligands-against-endothelial-markers-of-inflammation-and-oxidative-stress
#19
Federico Moccetti, Craig C Weinkauf, Brian P Davidson, J Todd Belcik, Edmund R Marinelli, Evan Unger, Jonathan R Lindner
The aim of this study was to evaluate a panel of endothelium-targeted microbubble (MB) ultrasound contrast agents bearing small peptide ligands as a human-ready approach for molecular imaging of markers of high-risk atherosclerotic plaque. Small peptide ligands with established affinity for human P-selectin, VCAM-1, LOX-1 and von Willebrand factor (VWF) were conjugated to the surface of lipid-stabilized MBs. Contrast-enhanced ultrasound (CEUS) molecular imaging of the thoracic aorta was performed in wild-type and gene-targeted mice with advanced atherosclerosis (DKO)...
June 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29534922/transthoracic-ultrasound-imaging-of-the-descending-thoracic-aorta-could-we-should-we-and-would-we
#20
EDITORIAL
Y Y Go, P Lancellotti
No abstract text is available yet for this article.
May 2018: European Journal of Vascular and Endovascular Surgery
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