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calcification calcified

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https://www.readbyqxmd.com/read/28797410/prevalence-predictors-and-clinical-presentation-of-a-calcified-nodule-as-assessed-by-optical-coherence-tomography
#1
Tetsumin Lee, Gary S Mintz, Mitsuaki Matsumura, Wenbin Zhang, Yang Cao, Eisuke Usui, Yoshihisa Kanaji, Tadashi Murai, Taishi Yonetsu, Tsunekazu Kakuta, Akiko Maehara
OBJECTIVES: This study sought to determine the anatomic characteristics and clinical presentation associated with a calcified nodule (CN) as assessed by optical coherence tomography. BACKGROUND: CN is an unusual but demonstrable cause of acute coronary syndromes (ACS). METHODS: We studied 889 de novo culprit lesions in 889 patients (48% ACS) who underwent optical coherence tomography before intervention. CN was defined as an eruptive accumulation of nodular calcification (small fractured calcifications)...
August 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28794507/rapid-decline-in-ph-of-coral-calcification-fluid-due-to-incorporation-of-anthropogenic-co2
#2
Kaoru Kubota, Yusuke Yokoyama, Tsuyoshi Ishikawa, Atsushi Suzuki, Masao Ishii
Marine calcifying organisms, such as stony corals, are under threat by rapid ocean acidification (OA) arising from the oceanic uptake of anthropogenic CO2. To better understand how organisms and ecosystems will adapt to or be damaged by the resulting environmental changes, field observations are crucial. Here, we show clear evidence, based on boron isotopic ratio (δ(11)B) measurements, that OA is affecting the pH of the calcification fluid (pHCF) in Porites corals within the western North Pacific Subtropical Gyre at two separate locations, Chichijima Island (Ogasawara Archipelago) and Kikaijima Island...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28792711/differential-expression-of-micrornas-in-calcific-aortic-stenosis
#3
Hai-Xia Xu, Yan Wang, Dong-Dong Zheng, Teng Wang, Min Pan, Jia-Hai Shi, Jian-Hua Zhu, Xiao-Fei Li
BACKGROUND: Calcific aortic stenosis (CAS) is the most common heart valve disorder. To explore the underlying mechanisms, we investigated whether key microRNAs in calcified aortic valves are differentially expressed compared to those in the non-calcified valves. METHODS: Calcified aortic valves from patients with aortic stenosis and non-calcified aortic valves (control) from patients with aortic insufficiency (n = 8 per group) were obtained during cardiac valve replacement surgery...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28790423/decoupling-between-the-response-of-coral-calcifying-fluid-ph-and-calcification-to-ocean-acidification
#4
S Comeau, C E Cornwall, M T McCulloch
Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28781916/nursing-review-section-of-surgical-neurology-international-part-2-lumbar-spinal-stenosis
#5
REVIEW
Nancy E Epstein, Renee D Hollingsworth
BACKGROUND: The lumbar spine includes 5 lumbar vertebral bodies, L1, L2, L3, L4, and L5. At each level, there is a disc space defined by the two bones (vertebral bodies) in the back; for example, there is a disc space at the L5-S1 level etc. The normal front to back (anterior to posterior or AP diameter) measurement of the spinal canal is typically 18-20 mm, but some patients have narrowing called spinal stenosis. METHODS: Lumbar stenosis is defined by two major types...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28774557/fibroblast-growth-factor-21-plays-an-inhibitory-role-in-vascular-calcification-in-vitro-through-opg-rankl-system
#6
Fangying Cao, Xiaoxiao Liu, Xiangrong Cao, Shaoping Wang, Kun Fu, Yejing Zhao, Fang Shen, Jinghua Liu
Vascular calcification is prevalent and associated with adverse outcome without available therapy. The benefits of fibroblast growth factor (FGF)-21 on metabolism and atherosclerosis make it a promising therapeutic agent for vascular calcification. We investigated the effects of FGF21 on vascular smooth muscle cell (VSMC) calcification by culturing rat VSMCs in a calcifying medium for 9days. FGF21 markedly attenuated mineral deposition and apoptosis at the indicated time points. In the presence of FGF21, the expression levels of osteoblastic protein including bone morphogenic protein-2, alkaline phosphatase(ALP), runt-related transcription factor(RUNX)-2 and nuclear factor-kappa B ligand (RANKL) were down-regulated, whereas the expression of osteoprotegerin (OPG) increased...
July 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28766833/coronary-atherectomy-is-associated-with-improved-procedural-and-clinical-outcomes-among-patients-with-calcified-coronary-lesions-insights-from-the-va-cart-program
#7
Ehrin J Armstrong, Maggie A Stanislawski, Damianos G Kokkinidis, Mary E Plomondon, Anna E Barón, Jay Giri, Kendrick A Shunk, Subhash Banerjee, Thomas M Maddox, Stephen W Waldo
OBJECTIVES: We sought to evaluate the prevalence of calcified coronary lesions and the association between the use of atherectomy and clinical outcomes. BACKGROUND: Calcified coronary arteries are associated with an increased risk of procedural complications during percutaneous coronary intervention (PCI). The outcomes of coronary atherectomy for adjunctive treatment of calcified coronary lesions are not well described. METHODS: We identified all patients treated for calcified coronary lesions at VA hospitals...
August 2, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28760473/transapical-mitral-valve-implantation-for-native-mitral-valve-stenosis-using-a-balloon-expandable-prosthesis
#8
Philipp Kiefer, Thilo Noack, Joerg Seeburger, Alexandro Hoyer, Axel Linke, Norman Mangner, Lukas Lehmkuhl, Friedrich Wilhelm Mohr, David Holzhey
BACKGROUND: Transcatheter mitral valve implantation (TMVI) is still in its infancy and is mainly limited to valve-in-valve or valve-in-ring implantations. We present the early experience with TMVI for severe calcified native MV stenosis. METHODS: Between January 2014 and June 2015, 6 of 11 patients screened (mean age, 77.4 ± 6.3 years; 66% men) with severe native mitral valve (MV) stenosis (mean gradient [Pmean], 11.1 ± 2.1 mm Hg; mean effective orifice area [EOA], 0...
July 28, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28756420/safety-and-feasibility-of-rotational-atherectomy-in-elderly-patients-with-severe-aortic-stenosis
#9
Matthew Lippmann, Jigar Patel, Jared Kvapil, David Westover, Michael Pierpoline, Peter Tadros, Mark Wiley, George Zorn, Greg Muehlebach, Ashwani Mehta, Eric Hockstad, Matthew Earnest, Kamal Gupta
BACKGROUND: Percutaneous coronary intervention (PCI) followed by transcatheter aortic valve replacement (TAVR) is an alternative to surgery in patients with severe aortic stenosis (AS) and coronary artery disease (CAD). In many, the coronary arteries are severely calcified and best treated with rotational atherectomy (RA). However, RA is not routinely performed in severe AS patients due to safety concerns. There is a paucity of data on the safety of RA in severe AS patients with calcific CAD...
August 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28755913/comparative-proteomics-of-matrix-fractions-between-pimpled-and-normal-chicken-eggshells
#10
Zhangguo Liu, Lingzi Song, Lizhi Lu, Xianfu Zhang, Fuming Zhang, Kehua Wang, Robert J Linhardt
Eggshell matrix can be dissociated into three matrix fractions: acid-insoluble matrix (M1), water-insoluble matrix (M2) and acid-water facultative-soluble matrix (M3). Matrix fractions from pimpled and normal eggshells were compared using label-free proteomic method to understand the differences among three matrix fractions and the proteins involved with eggshell quality. A total of 738 and 600 proteins were identified in the pimpled and normal calcified eggshells, respectively. Both eggshells showed a combined proteomic inventory of 769 proteins...
July 26, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28754399/relation-between-superficial-calcifications-and-plaque-rupture-an-optical-coherence-tomography-study
#11
Yefei Zhan, Yingying Zhang, Jingbo Hou, Guochang Lin, Bo Yu
BACKGROUND: There are several forms of calcium deposition, which play different roles in the stability of the coronary artery. It remains unknown whether certain calcification morphological characteristics determine rupture of lipid-rich lesions in the same plaque in acute coronary syndrome (ACS). METHODS: We retrospectively analyzed 550 patients with ACS between May 2008 and October 2014, who had undergone preintervention optical coherence tomography (OCT) imaging examination...
August 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28734587/computed-tomography-predict-regression-of-coronary-artery-aneurysm-in-patients-with-kawasaki-disease
#12
Po-Ting Chen, Ming-Tai Lin, Yih-Sharng Chen, Shyh-Jye Chen, Mei-Hwan Wu
BACKGROUND/PURPOSE: The study evaluated possible factors influencing the regression of coronary artery aneurysm (CAA) in patients with Kawasaki disease (KD) through electrocardiographically gated cardiac computed tomography (CT). METHODS: 18 patients with KD exhibited CAAs in at least 2 CT examinations conducted from December 2004 to September 2015, and 37 aneurysms were observed. Every aneurysm was corrected through the descending aorta at the origin level of the left main coronary artery under a normal distribution and measured under a fixed window level...
July 19, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28733974/impact-of-diabetes-mellitus-on-procedural-and-one-year-clinical-outcomes-following-treatment-of-severely-calcified-coronary-lesions-with-the-orbital-atherectomy-system-a-subanalysis-of-the-orbit-ii-study
#13
Michael S Lee, Brad J Martinsen, Arthur C Lee, Ann N Behrens, Richard A Shlofmitz, Christopher Y Kim, Jeffrey W Chambers
OBJECTIVES: The goal of the study was to investigate the safety and efficacy of the coronary orbital atherectomy system to treat severe coronary artery calcification (CAC) prior to stent placement in diabetic and non-diabetic patients. BACKGROUND: The ORBIT II study reported the safety and efficacy of orbital atherectomy treatment in 443 patients with severe CAC. Percutaneous coronary intervention in diabetic patients is associated with an increased risk of major adverse cardiac events (MACE) compared with non-diabetics...
July 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28729377/abundant-dystrophic-calcifications-mimicking-aortic-valve-abscess-in-a-patient-undergoing-elective-aortic-valve-replacement
#14
Adam L Booth, Christine Q Li, Ghannam Ayed Al-Dossari, Heather L Stevenson
Dystrophic calcifications of the aortic valve may cause symptomatic aortic stenosis and account for a significant portion of patients who undergo elective valve replacement. Calcifications appearing grossly as a cloudy fluid surrounding the aortic valve leaflets are an uncommon finding. Normally, calcified aortic valves are characterised by large, nodular masses within the aortic cusps. We report a case of dystrophic calcifications on a stenotic aortic valve encountered intraoperatively, which was suggestive of infective endocarditis and abscess formation...
July 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28722701/susceptibility-weighted-with-quantitative-phase-magnetic-resonance-imaging-in-differentiation-of-various-stages-of-hemorrhage-and-calcification-in-female-pelvic-pathologies-a-preliminary-study
#15
Sakshi Khurana, Prativa Sahoo, Mukta Kapila, Swati Mittal, Manavita Mahajan, Indrajit Saha, Rakesh Kumar Gupta
BACKGROUND: The purposes of this study were to assess the value of phase for characterization of female pelvic lesions with hemorrhage in various stages and to differentiate them from calcified lesions at 3.0-T magnetic resonance imaging (MRI). METHODS: Forty-four female patients with hemorrhagic (n = 37) or calcified (n = 7) pelvic pathology underwent conventional MRI including susceptibility-weighted imaging with phase information. Hemorrhagic lesions were grouped into acute, subacute, and chronic, and calcified lesions were detected on the basis of conventional imaging findings...
July 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28722295/prevalence-correlates-and-impact-of-coronary-calcification-on-adverse-events-following-pci-with-newer-generation-des-findings-from-a-large-multiethnic-registry
#16
Robert S Copeland-Halperin, Usman Baber, Melissa Aquino, Anitha Rajamanickam, Swathi Roy, Choudhury Hasan, Nitin Barman, Jason C Kovacic, Pedro Moreno, Prakash Krishnan, Joseph M Sweeny, Roxana Mehran, George Dangas, Annapoorna S Kini, Samin K Sharma
OBJECTIVES: We sought to determine the prevalence, predictors, and clinical impact of target lesion calcification in patients undergoing percutaneous coronary intervention (PCI) with newer generation drug-eluting stents (DES) and devices. BACKGROUND: Coronary calcification is independently associated with adverse outcomes following PCI. While newer DES and contemporary devices are considered safer and more efficacious, their influence on outcomes following PCI of heavily calcified lesions is unknown...
July 19, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28720499/coronary-artery-disease-associated-gene-phactr1-modulates-severity-of-vascular-calcification-in%C3%A2-vitro
#17
Redouane Aherrahrou, Zouhair Aherrahrou, Heribert Schunkert, Jeanette Erdmann
Calcification of vessels is strongly associated with atherosclerosis and leads to coronary artery disease (CAD) and myocardial infarction (MI). Genome-wide association studies (GWAS) revealed several genes that are associated with and contribute to CAD/MI as well as coronary artery calcification (CAC); however, the underlying mechanisms are unknown. PHACTR1, which encodes phosphatase and actin regulator 1, is among these risk genes. The aim of this study was to functionally test whether Phactr1 regulates calcification in vitro using murine embryonic stem cell (mESC)-derived smooth muscle cells (SMCs)...
July 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28720119/calcified-amorphous-tumor-of-the-heart-with-mitral-annular-calcification-a-case-report
#18
Ryo Nakamaru, Hiroki Oe, Katsuomi Iwakura, Takafumi Masai, Kenshi Fujii
BACKGROUND: Calcified amorphous tumor of the heart is a rare, non-neoplastic cardiac mass characterized by nodular calcium in the background of amorphous degenerating fibrinous material. Clinical diagnosis of calcified amorphous tumor can be difficult, and current single imaging techniques do not specifically differentiate calcified amorphous tumor from other cardiac tumors such as calcified atrial myxoma, calcified thrombi, or vegetation. Complete surgical resection is the treatment of choice for both symptom improvement and prevention of embolization, as well as for pathological diagnosis...
July 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28718912/survival-of-atherosclerotic-calcifications-in-skeletonized-material-forensic-and-pathological-implications
#19
Lucie Biehler-Gomez, Annalisa Cappella, Elisa Castoldi, Laurent Martrille, Cristina Cattaneo
Atherosclerosis is a chronic inflammatory disease creating calcifying plaques in the arterial walls. Because its paleopathological diagnosis remains little studied on skeletal remains, its impact on forensic and archeological data is completely underestimated. Here, 24 skeletal remains from the Milano Cemetery Skeletal Collection have been studied to evaluate the chance of atherosclerotic calcification survival, retrieval, and identification. Through direct comparison with a known autopsy collection and literature, the identification and categorization of several types of calcifications were performed...
July 18, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28712720/manual-aspiration-thrombectomy-in-patients-with-acute-stroke-related-calcified-cerebral-emboli
#20
Esther Koh, Hyo Sung Kwak, Gyung-Ho Chung
OBJECTIVE: The aim of this study was to evaluate the effectiveness of mechanical aspiration thrombectomy (MAT) in patients with acute ischemic stroke from calcified cerebral emboli. METHODS: Procedural results were reviewed for acute stroke patients with clinically neurological deficits who underwent recanalization from October 2012 through September 2015. Initial imaging studies and cerebral angiography were analyzed. RESULTS: Of the total number of patients with acute stroke, 5 patients were confirmed to have acute ischemic stroke by calcified cerebral emboli...
July 13, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
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