keyword
MENU ▼
Read by QxMD icon Read
search

Arterial switch

keyword
https://www.readbyqxmd.com/read/28937491/improved-calcium-scoring-at-dual-energy-computed-tomography-angiography-using-a-high-z-contrast-element-and-novel-material-separation-technique
#1
Jack W Lambert, Yuxin Sun, Karen G Ordovas, Robert G Gould, Sizhe Wang, Benjamin M Yeh
OBJECTIVES: The aim of this study was to compare the accuracy of existing dual-energy computed tomography (CT) angiography coronary artery calcium scoring methods to those obtained using an experimental tungsten-based contrast material and a recently described contrast material extraction process (CMEP). METHODS: Phantom coronary arteries of varied diameters, with different densities and arcs of simulated calcified plaque, were sequentially filled with water, iodine, and tungsten contrast materials and scanned within a thorax phantom at rapid-kVp-switching dual-energy CT...
September 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28935506/endothelial-specific-sirt3-deletion-impairs-glycolysis-and-angiogenesis-and-causes-diastolic-dysfunction
#2
Xiaochen He, Heng Zeng, Sean T Chen, Richard J Roman, Judy L Aschner, Sean Didion, Jian-Xiong Chen
Endothelial glycolysis plays a critical role in the regulation of angiogenesis. We investigated the role of Sirtuin 3 (SIRT3) on endothelial cell (EC) glycolytic metabolism, angiogenesis, and diastolic function. Our aim was to test the hypothesis that loss of SIRT3 in ECs impairs endothelial glycolytic metabolism and angiogenesis and contributes to myocardial capillary rarefaction and the development of diastolic dysfunction. Using SIRT3 deficient ECs, SIRT3 was found to regulate a metabolic switch between mitochondrial respiration and glycolysis...
September 18, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28927693/detection-of-pulmonary-venous-channel-stenosis-in-a-newly-created-left-atrium-after-the-senning-procedure-in-a-child-undergoing-a-double-switch-operation-for-l-transposition-of-the-great-arteries
#3
Satoshi Kurokawa, Keita Sato, Nobuo Sasaki, Shota Moriwaki, Minoru Nomura, Makoto Ozaki
No abstract text is available yet for this article.
June 6, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28925322/unusual-intramural-coronary-artery-with-vertical-course-complicating-an-arterial-switch-operation
#4
Lok Sinha, Richard A Jonas, Pranava Sinha
Intramural coronary arteries in patients with d-transposition of the great arteries (d-TGA) usually arise from the opposite sinus of Valsalva and traverse horizontally across the posterior/facing commissure before emerging externally from the appropriate sinus of Valsalva. Failure to make appropriate technical modifications during coronary transfer can result in an important risk of posttransfer ischemia. We report a case with an unusual course of an intramural left anterior descending (LAD) coronary artery in a patient with d-TGA, with origin at the mid ascending aorta and a vertical intramural course, increasing the susceptibility to injury during an arterial switch operation (ASO)...
January 1, 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28918529/anatomic-repair-of-congenitally-corrected-transposition-of-the-great-arteries-single-center-intermediate-term-experience
#5
Shagun Sachdeva, Roni M Jacobsen, Ronald K Woods, Michael E Mitchell, Joseph R Cava, Nancy S Ghanayem, Peter C Frommelt, Peter J Bartz, James S Tweddell
We present our experience for patients who have undergone an anatomic repair (AR) for congenitally corrected transposition of the great arteries (CCTGA) at the Children's Hospital of Wisconsin. A retrospective chart review of patients who underwent AR for CCTGA from 2001 to 2015 was performed. The cohort consisted of 15 patients (74% male). Median age of anatomic repair was 15 months (range 4.5-45.6 months). Four patients had a bidirectional Glenn (BDG) prior to AR. At the time of AR,-9 (60%) underwent Senning/Rastelli procedure, 4 (26...
September 16, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28917022/epidemiology-pathogenesis-and-management-of-takotsubo-syndrome
#6
REVIEW
Shams Y-Hassan, Per Tornvall
Takotsubo syndrome is a recently recognized acute cardiac disease entity with a clinical presentation resembling that of an acute coronary syndrome. The typical takotsubo syndrome patient has a unique circumferential left (bi-) ventricular contraction abnormality profile that extends beyond a coronary artery supply territory and appears to follow the anatomical cardiac sympathetic innervation. The syndrome predominantly affects postmenopausal women and is often preceded by emotional or physical stress. Patients with predisposing factors such as malignancy and other chronic comorbidities are more prone to suffer from takotsubo syndrome...
September 15, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28912364/novel-pathological-role-of-hnrnpa1-heterogeneous-nuclear-ribonucleoprotein-a1-in-vascular-smooth-muscle-cell-function-and-neointima-hyperplasia
#7
Li Zhang, Qishan Chen, Weiwei An, Feng Yang, Eithne Margaret Maguire, Dan Chen, Cheng Zhang, Guanmei Wen, Mei Yang, Bin Dai, Le Anh Luong, Jianhua Zhu, Qingbo Xu, Qingzhong Xiao
OBJECTIVE: hnRNPA1 (heterogeneous nuclear ribonucleoprotein A1) plays a variety of roles in gene expression. However, little is known about the functional involvement of hnRNPA1 in vascular smooth muscle cell (VSMC) function and neointima hyperplasia. In this study, we have attempted to investigate the functional roles of hnRNPA1 in the contexts of VSMC function, injury-induced vessel remodeling, and human atherosclerotic lesions, as well as discern the molecular mechanisms involved. APPROACH AND RESULTS: hnRNPA1 expression levels were consistently modulated during VSMC phenotype switching and neointimal lesion formation induced by wire injury...
September 14, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28901639/predicting-changes-in-flow-category-in-patients-with-severe-aortic-stenosis-and-preserved-left-ventricular-ejection-fraction-on-medical-therapy
#8
Jinghao Nicholas Ngiam, Ivandito Kuntjoro, Benjamin Y Q Tan, Hui-Wen Sim, William K F Kong, Tiong-Cheng Yeo, Kian-Keong Poh
BACKGROUND/OBJECTIVES: Controversy surrounds the prognosis and management of patients with paradoxical low-flow severe aortic stenosis (AS) with preserved left ventricular ejection fraction (LVEF). It was not certain if patients in a particular flow category remained in the same category as disease progressed. We investigated whether there were switches in categories and if so, their predictors. METHODS: Consecutive subjects (n = 203) with isolated severe AS and paired echocardiography (>180 days apart) were studied...
September 13, 2017: Echocardiography
https://www.readbyqxmd.com/read/28901233/a-quarter-century-after-primary-direct-arterial-switch-operation-four-d-flow-mri-video-imaging-of-blood-flow-dynamics-outcomes
#9
Hans-Hinrich Sievers, Dominik Gabbert, Carsten Rickers
Four-dimensional (4-D) flow magnetic resonance imaging (MRI) examination was performed 25 years after a neonatal direct arterial switch operation for simple transposition of the great arteries. The 4-D flow MRI video shows physiological spiral anatomical configuration and laminar streamlines in the great arteries.
September 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28892658/homozygous-antithrombin-deficiency-type-ii-causing-neonatal-thrombosis
#10
Vanessa Swoboda, Katharina Zervan, Katharina Thom, Christine Mannhalter, Peter Quehenberger, Ingrid Pabinger, Christoph Male
We report four children from different families with homozygous antithrombin (AT) deficiency type II affecting the heparin binding site (p.Leu131Phe mutation). All children had severe spontaneous venous and/or arterial thromboembolic events shortly after birth. This report intends to raise awareness among clinicians about this rare but severe condition. When thrombosis occurs in an otherwise healthy newborn, a severe congenital thrombophilic disorder should be considered. In homozygous AT deficiency type II, AT activity is typically reduced but may also be in the normal range, posing a diagnostic challenge...
September 4, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28891856/transanal-total-mesorectal-excision-pneumodissection-of-retroperitoneal-structures-eases-laparoscopic-rectal-resection
#11
Cristiano G S Hüscher, Marco Maria Lirici
INTRODUCTION: Laparoscopic total mesorectal excision is effective and safe but often technically challenging because of inadequate exposure. Transanal total mesorectal excision was introduced to mitigate this limitation and improve the quality of mesorectal dissection in even the most challenging cases. Currently, the technique for transanal total mesorectal excision dissection is not standardized. TECHNIQUE: The sequential approach to transanal total mesorectal excision mirrors the principles of the transanal abdominal transanal procedure...
October 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28889824/differences-in-clinical-outcomes-and-cost-between-complex-and-simple-arterial-switches
#12
Eric R Griffiths, Nelangi M Pinto, Aaron W Eckhauser, Ragheed Al-Dulaimi, Angela P Presson, David K Bailly, Phillip T Burch
BACKGROUND: This study evaluates the morbidity, mortality, and cost differences between patients who underwent either a simple or a complex arterial switch operation. METHODS: A retrospective study of patients undergoing an arterial switch operation at a single institution was performed. Simple cases were defined as patients with d-transposition of the great arteries with usual coronary anatomy or circumflex artery originating from the right with either intact ventricular septum or ventricular septal defect...
September 11, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28889107/respite-switching-to-riociguat-in-pulmonary-arterial-hypertension-patients-with-inadequate-response-to-phosphodiesterase-5-inhibitors
#13
Marius M Hoeper, Gérald Simonneau, Paul A Corris, Hossein-Ardeschir Ghofrani, James R Klinger, David Langleben, Robert Naeije, Pavel Jansa, Stephan Rosenkranz, Laura Scelsi, Ekkehard Grünig, Carmine Dario Vizza, MiKyung Chang, Pablo Colorado, Christian Meier, Dennis Busse, Raymond L Benza
A proportion of pulmonary arterial hypertension (PAH) patients do not reach treatment goals with phosphodiesterase-5 inhibitors (PDE5i). RESPITE investigated the safety, feasibility and benefit of switching from PDE5i to riociguat in these patients.RESPITE was a 24-week, open-label, multicentre, uncontrolled study. Patients in World Health Organization (WHO) functional class (FC) III, with 6-min walking distance (6MWD) 165-440 m, cardiac index <3.0 L·min(-1)·m(-2) and pulmonary vascular resistance >400 dyn·s·cm(-5) underwent a 1-3 day PDE5i treatment-free period before receiving riociguat adjusted up to 2...
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28888042/effect-of-a-multinutrient-intervention-after-ischemic-stroke-in-female-c57bl-6-mice
#14
Maximilian Wiesmann, Nienke M Timmer, Bastian Zinnhardt, Dirk Reinhard, Sarah Eligehausen, Anja Königs, Hasnae Ben Jeddi, Pieter J Dederen, Andreas H Jacobs, Amanda J Kiliaan
Stroke can affect females very differently from males, and therefore preclinical research on underlying mechanisms and the effects of interventions should not be restricted to male subjects, and treatment strategies for stroke should be tailored to benefit both sexes. Previously, we demonstrated that a multinutrient intervention (Fortasyn) improved impairments after ischemic stroke induction in male C57Bl/6 mice, but the therapeutic potential of this dietary treatment remained to be investigated in females...
September 9, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28883714/vascular-aging-and-subclinical-atherosclerosis-why-such-a-never-ending-and-challenging-story-in-cardiology
#15
EDITORIAL
Stela Iurciuc, Anca Maria Cimpean, Florin Mitu, Rodica Heredea, Mircea Iurciuc
The true onset of atherosclerosis remains one of the biggest challenges for cardiologists. Is atheroma plaque development considered the earliest step of vascular aging? If so, when it starts? Before or after birth? If it starts before birth or early during childhood, it seems that Thomas Sydenham was right: "A man is as old as his arteries." Except disorganization of elastic fibers, less is known about the morphology of vascular aging and also about the molecular events influencing the age of arteries, arterial stiffness, and their role in the appearance of future complications...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28882820/high-levels-of-un-switched-memory-b-cells-are-associated-with-better-outcome-in-patients-with-advanced-atherosclerotic-disease
#16
John A L Meeuwsen, Amerik van Duijvenvoorde, Aisha Gohar, Maria O Kozma, Sander M van de Weg, Crystel M Gijsberts, Saskia Haitjema, Harry Björkbacka, Gunilla N Fredrikson, Gert J de Borst, Hester M den Ruijter, Gerard Pasterkamp, Christoph J Binder, Imo E Hoefer, Saskia C A de Jager
BACKGROUND: Atherosclerosis is an inflammatory lipid disorder and the main underlying pathology of acute ischemic events. Despite a vast amount of data from murine atherosclerosis models, evidence of B-cell involvement in human atherosclerotic disease is limited. We therefore investigated the association of circulating B-cell subtypes with the occurrence of secondary cardiovascular events in advanced atherosclerotic disease. METHODS AND RESULTS: This cohort study consists of 168 patients who were included in the Athero-Express biobank between 2009 and 2011...
September 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28882100/low-dose-cyclosporine-in-treatment-of-membranous-nephropathy-with-nephrotic-syndrome-effectiveness-and-renal-safety
#17
Xiaojuan Yu, Lin Ruan, Zhen Qu, Zhao Cui, Yimiao Zhang, Xin Wang, Liqiang Meng, Xiaojing Liu, Fang Wang, Ying Zhang, Gang Liu, Li Yang
BACKGROUND: To observe effectiveness and renal safety of long-term low-dose cyclosporine in idiopathic membranous nephropathy (IMN). METHODS: Sixty-eight patients were enrolled in this prospective cohort study. Renal endpoint was defined as a decrease in eGFR ≥50% from baseline and a development of eGFR ≤60 ml/min/1.73m(2). RESULTS: A cyclosporine dose of 2.0 ± 0.5 mg/kg/d and a prednisone of 0.3 ± 0.2 mg/kg/d were prescribed...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28860005/hypoxia-decrease-expression-of-cartilage-oligomeric-matrix-protein-to-promote-phenotype-switching-of-pulmonary-arterial-smooth-muscle-cells
#18
Hang Yu, Qingbo Jia, Xiaoqian Feng, Hongxia Chen, Liang Wang, Xiuqin Ni, Wei Kong
Extracellular matrix proteins play important roles in the development of pulmonary hypertension(pH). However, the role of Cartilage oligomeric matrix protein (COMP) in the development of hypoxia-induced pH is largely unknown. We tested the hypothesis that COMP deficiency induced by hypoxia leads to the phenotype switching of pulmonary arterial smooth muscle cells (PASMCs). The expression of COMP decreased in a chronic hypoxia rat pH model (P<0.05) and in PASMCs under hypoxia (3%O2) (P<0.05). The expressions of differentiated marker proteins reduced in the pulmonary arteries from 5 month old COMP(-/-) mice and in PASMCs under hypoxia or with the siRNA of COMP treatment under normoxia, but increased in PASMCs with adenovirus-increased COMP under hypoxia...
August 30, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28854963/takayasu-s-arteritis-a-case-with-relapse-after-urgent-coronary-revascularization
#19
Klaus Empen, Astrid Hummel, Daniel Beug, Stephan B Felix, Mathias C Busch, Piotr M Kaczmarek
BACKGROUND: Vasculitides are commonly unrecognized causes of coronary stenosis and myocardial ischemia. We report on a 24-year old patient with Takayasu's arteritis who underwent urgent percutaneous coronary intervention, suffered from symptomatic restenosis of the left main coronary artery during standard immunosuppressive therapy. CASE PRESENTATION: A 24-year old woman was referred for coronary angiography because of typical progressive angina pectoris. On bicycle ergometry, there were both reproducible symptoms and deep ST segment depressions on precordial leads...
July 25, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28852519/fatal-diffuse-alveolar-haemorrhage-mimicking-acute-exacerbation-in-idiopathic-pulmonary-fibrosis-treated-with-nintedanib
#20
Keishi Sugino, Yasuhiko Nakamura, Muneyuki Sekiya, Hiroshi Kobayashi, Kazutoshi Shibuya, Sakae Homma
A 75-year-old man was referred to our hospital with a 1-year history of persistent dry cough and progressive dyspnoea on exertion. He was treated with aspirin due to thrombosis of internal carotid artery. He was diagnosed with idiopathic pulmonary fibrosis (IPF)/usual interstitial pneumonia (UIP), and started on inhaled N-acetylcysteine therapy and pirfenidone. Since his clinical condition progressively deteriorated after 6 months, he was switched from pirfenidone to nintedanib. As a result, his general condition worsened rapidly...
November 2017: Respirology Case Reports
keyword
keyword
8678
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"