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https://www.readbyqxmd.com/read/29780907/calcified-amorphous-tumor-a-rare-cause-of-central-retinal-artery-occlusion
#1
Jeffrey H Ma, Manjot K Gill
Purpose: We report the case of a central retinal artery occlusion secondary to presumed embolus from a calcified amorphous tumor of the heart, a very rare non-neoplastic cardiac mass. Observations: A 60-year-old female presented with acute unilateral vision loss of the left eye. Examination revealed hand motion visual acuity of the left eye and a left relative afferent pupillary defect. Fundoscopy showed whitening of the macula with a cherry red spot, consistent with a central retinal artery occlusion...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29779973/impact-of-device-host-interaction-on-paravalvular-aortic-regurgitation-with-different-transcatheter-heart-valves
#2
Ramón Rodríguez-Olivares, Nahid El Faquir, Zouhair Rahhab, Lennart van Gils, Ben Ren, Rafi Sakhi, Marcel L Geleijnse, Ron van Domburg, Peter P T de Jaegere, Jose L Zamorano Gómez, Nicolas M Van Mieghem
AIMS: We sought to evaluate the interaction of different aortic root phenotypes with self-expanding (SEV), balloon-expandable (BEV) and mechanically expanded (MEV) and the impact on significant aortic regurgitation. METHODS AND RESULTS: We included 392 patients with a SEV (N = 205), BEV (N = 107) or MEV (N = 80). Aortic annulus eccentricity index and calcification were measured by multi-slice CT scan. Paravalvular aortic regurgitation was assessed by contrast aortography (primary analysis) and transthoracic echocardiography (secondary analysis)...
May 6, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29778857/development-of-a-risk-score-based-on-aortic-calcification-to-predict-1-year-mortality-after-transcatheter-aortic-valve-replacement
#3
Pierre Lantelme, Hélène Eltchaninoff, Muriel Rabilloud, Géraud Souteyrand, Marion Dupré, Marco Spaziano, Marc Bonnet, Clément Becle, Benjamin Riche, Eric Durand, Erik Bouvier, Jean-Nicolas Dacher, Pierre-Yves Courand, Lucie Cassagnes, Eduardo E Dávila Serrano, Pascal Motreff, Loic Boussel, Thierry Lefèvre, Brahim Harbaoui
OBJECTIVES: The aim of this study was to develop a new scoring system based on thoracic aortic calcification (TAC) to predict 1-year cardiovascular and all-cause mortality. BACKGROUND: A calcified aorta is often associated with poor prognosis after transcatheter aortic valve replacement (TAVR). A risk score encompassing aortic calcification may be valuable in identifying poor TAVR responders. METHODS: The C4 CAPRI (4 Cities for Assessing CAlcification PRognostic Impact) multicenter study included a training cohort (1,425 patients treated using TAVR between 2010 and 2014) and a contemporary test cohort (311 patients treated in 2015)...
May 11, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29773466/in-vivo-morphologic-comparison-of-saphenous-vein-grafts-and-native-coronary-arteries-following-non-st-elevation-myocardial-infarction
#4
Tom Hsun-Wei Huang, Kalpa De Silva, Usaid K Allahwala, Edward J Danson, Pasi K Karjalainen, Olli A Kajander, Ravinay Bhindi
OBJECTIVE: This study aimed to assess the pathophysiological differences between saphenous vein grafts (SVG) and native coronary arteries (NCA) following presentation with non-ST elevated myocardial infarction (NSTEMI). BACKGROUND: There is accelerated pathogenesis of de novo coronary disease in harvested SVG following coronary artery bypass (CABG) surgery, which contributes to both early and late graft failure, and is also causal in adverse outcomes following vein graft PCI...
April 16, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29770264/calcified-triticeous-cartilage-detected-on-digital-panoramic-radiographs-in-a-sample-of-lebanese-population
#5
Georges Aoun, Ibrahim Nasseh
Objective: Triticeous cartilage is a small ovoid structure belonging to the laryngeal skeleton. When calcified, it becomes visible on panoramic radiographs and be mistaken for a carotid artery calcification (CAC) associated with cerebrovascular accidents. This study aimed to estimate the prevalence of calcified triticeous cartilage (CTC) detected by means of digital panoramic radiographs in a sample of Lebanese population. Materials and Methods: Digital panoramic radiographs of 500 Lebanese adult patients (281 females and 219 males) with a mean age of 47...
2018: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/29761657/nesting-environment-may-drive-variation-in-eggshell-structure-and-egg-characteristics-in-the-testudinata
#6
D Charles Deeming
Testudines exhibit considerable variation in the degree of eggshell calcification, which affects eggshell conductance, water physiology of the embryos, and calcium metabolism of embryos. However, the underlying reason for different shell types has not been explored. Phylogenetically controlled analyses examined relationships between egg size, shell mass, and clutch size in ∼200 turtle species from a range of body sizes and assigned by family as laying either rigid- or pliable-shelled eggs. Shell type affected egg breadth relative to pelvic dimensions, egg mass, and relative shell mass but did not affect size, mass, or total shell mass of the clutch...
May 14, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29755140/resilience-in-carbonate-production-despite-three-coral-bleaching-events-in-5-years-on-an-inshore-patch-reef-in-the-florida-keys
#7
Derek P Manzello, Ian C Enochs, Graham Kolodziej, Renée Carlton, Lauren Valentino
The persistence of coral reef frameworks requires that calcium carbonate (CaCO3 ) production by corals and other calcifiers outpaces CaCO3 loss via physical, chemical, and biological erosion. Coral bleaching causes declines in CaCO3 production, but this varies with bleaching severity and the species impacted. We conducted census-based CaCO3 budget surveys using the established ReefBudget approach at Cheeca Rocks, an inshore patch reef in the Florida Keys, annually from 2012 to 2016. This site experienced warm-water bleaching in 2011, 2014, and 2015...
2018: Marine Biology
https://www.readbyqxmd.com/read/29753636/coronary-arterial-calcification-a-review-of-mechanisms-promoters-and-imaging
#8
REVIEW
Jordan Andrews, Peter J Psaltis, Belinda A Di Bartolo, Stephen J Nicholls, Rishi Puri
Coronary artery calcification (CAC) was once thought to be a passive, degenerative, and quiescent development of disease. However, it has now been shown to be an active process associated with atherosclerosis that is stimulated by inflammatory pathways. Calcification forms within the intimal and medial layers of the vessel wall by way of mechanisms similar to bone development. A variety of imaging modalities have been used to identify and characterize CAC, from early microcalcifications to well-developed fibroatheromas that have calcified...
May 2, 2018: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29752279/a-comprehensive-study-of-calcific-aortic-stenosis-from-rabbit-to-human-samples
#9
L Mourino-Alvarez, M Baldan-Martin, T Sastre-Oliva, M Martin-Lorenzo, A S Maroto, N Corbacho-Alonso, R Rincon, T Martin-Rojas, L F Lopez-Almodovar, G Alvarez-Llamas, F Vivanco, L R Padial, F de la Cuesta, M G Barderas
The global incidence of calcific aortic stenosis (CAS) is increasing due, in part, to a growing elderly population, and poses a great challenge to public health because of the multiple comorbidities of these patients. Using a rabbit model of CAS, we sought to characterize protein alterations associated with calcified valve tissue that can be ultimately measured in plasma as non-invasive biomarkers of CAS.Aortic valves from healthy and mild stenotic rabbits were analyzed by two-dimensional difference gel electrophoresis, and selected reaction monitoring was used to directly measure the differentially expressed proteins in plasma from the same rabbits to corroborate their potential as diagnostic indicators, and also in plasma from human subjects, to examine their translatability to the clinical setting...
May 10, 2018: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29751516/engineering-a-3d-bioprinted-model-of-human-heart-valve-disease-using-nanoindentation-based-biomechanics
#10
Dewy C van der Valk, Casper F T van der Ven, Mark C Blaser, Joshua M Grolman, Pin-Jou Wu, Owen S Fenton, Lang H Lee, Mark W Tibbitt, Jason L Andresen, Jennifer R Wen, Anna H Ha, Fabrizio Buffolo, Alain van Mil, Carlijn V C Bouten, Simon C Body, David J Mooney, Joost P G Sluijter, Masanori Aikawa, Jesper Hjortnaes, Robert Langer, Elena Aikawa
In calcific aortic valve disease (CAVD), microcalcifications originating from nanoscale calcifying vesicles disrupt the aortic valve (AV) leaflets, which consist of three (biomechanically) distinct layers: the fibrosa, spongiosa, and ventricularis. CAVD has no pharmacotherapy and lacks in vitro models as a result of complex valvular biomechanical features surrounding resident mechanosensitive valvular interstitial cells (VICs). We measured layer-specific mechanical properties of the human AV and engineered a three-dimensional (3D)-bioprinted CAVD model that recapitulates leaflet layer biomechanics for the first time...
May 3, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29748157/interleukin-32-plays-an-essential-role-in-human-calcified-aortic-valve-cells
#11
Chung-Lin Tsai, Ying-Ming Chiu, Yi-Ju Lee, Chin-Tung Hsieh, Dong-Chen Shieh, Gregory J Tsay, Da-Tian Bau, Yi-Ying Wu
Interleukin-32 (IL-32) is an inflammatory cytokine produced mainly by T, natural killer, and epithelial cells. Previous studies on IL-32 have primarily investigated its proinflammatory properties. The IL-32 also has been described as an activator of the p38 mitogen-activated protein kinase (MAPK) and NF-κB, and induces several cytokines. In this study, we hypothesized that the inflammatory regulators NF-κB, MAP kinase, STAT1, and STAT3 are associated with the expression of the IL-32 protein in human calcified aortic valve cells...
March 1, 2018: European Cytokine Network
https://www.readbyqxmd.com/read/29742599/the-detection-of-uterine-leiomyoma-fibroid-calcifications-on-18f-naf-pet-ct
#12
Abdullah Al-Zaghal, Thomas J Werner, Poul F Høilund-Carlsen, Abass Alavi
Uterine leiomyomas (fibroids) are the most common type of uterine neoplasms in premenopausal women. Leiomyomas are estrogen dependent and tend to atrophy and shrink in size after menopause. Dystrophic calcification, cystic changes, and necrosis are among the changes that indicate uterine fibroid involution. We are presenting a calcified uterine leiomyoma in a 61-year-old woman as incidentally detected on F-NaF PET/CT scanning. Many previous publications have reported the accumulation of F-NaF in soft tissue calcifications; these findings further set new directions in the evaluation of the metabolic activity of macrocalcification and microcalcification using molecular imaging probes...
May 7, 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29731908/calcific-myonecrosis-mimicking-soft-tissue-sarcoma-a-case-report
#13
Yuichiro Ukon, Takaaki Tanaka, Shigenori Nagata, Hiroki Hagizawa, Yoshinori Imura, Hironari Tamiya, Kazuya Oshima, Norifumi Naka, Yasuaki Aoki, Shigeyuki Kuratsu
Calcific myonecrosis is a rare soft tissue condition. The first case was reported in 1960, however, the precise pathophysiology of calcific myonecrosis remains unclear. The disease was thought to arise from compartment syndrome within a confined space resulting in necrosis and fibrosis, subsequent repeated intralesional hemorrhage, mass enlargement and calcification. Several previous reports have described calcific myonecrosis, which include the formation of calcific myonecrosis after a prolonged period of post trauma...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29721770/selenoprotein-s-inhibits-inflammation-induced-vascular-smooth-muscle-cell-calcification
#14
Yali Ye, Weixia Bian, Fen Fu, Jian Hu, Hongmei Liu
Vascular calcification is a prominent feature of many diseases including atherosclerotic cardiovascular disease (CVD), leading to high morbidity and mortality rates. A significant association of selenoprotein S (SelS) gene polymorphism with atherosclerotic CVD has been reported in epidemiologic studies, but the underlying mechanism is far from clear. To investigate the role of SelS in inflammation-induced vascular calcification, osteoblastic differentiation and calcification of vascular smooth muscle cells (VSMCs) induced by lipopolysaccharide (LPS) or tumor necrosis factor (TNF)-α were compared between the cells with and without SelS knockdown...
May 2, 2018: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/29721233/dentigerous-cyst-with-parietal-and-intracystic-calcifications-a-case-report-and-literature-review
#15
Jordi Borrás-Ferreres, Alba Sánchez-Torres, José-Manuel Aguirre-Urizar, Cosme Gay-Escoda
Background: Dentigerous cyst appears surrounding the crown of an included tooth. On the radiographic exam, a radiolucent rounded well-defined lesion can be observed. Material and Methods: This study reports a clinical case of a 34-years old man with a pericoronal radiolucent lesion associated to an impacted lower third molar with the presence of radiopaque material inside. The radiological differential diagnosis was calcifying odontogenic tumor, adenomatoid odontogenic tumor and dentigerous cyst...
March 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29720611/blooming-artifact-reduction-in-coronary-artery-calcification-by-a-new-de-blooming-algorithm-initial-study
#16
Ping Li, Lei Xu, Lin Yang, Rui Wang, Jiang Hsieh, Zhonghua Sun, Zhanming Fan, Jonathon A Leipsic
The aim of this study was to investigate the use of de-blooming algorithm in coronary CT angiography (CCTA) for optimal evaluation of calcified plaques. Calcified plaques were simulated on a coronary vessel phantom and a cardiac motion phantom. Two convolution kernels, standard (STND) and high-definition standard (HD STND), were used for imaging reconstruction. A dedicated de-blooming algorithm was used for imaging processing. We found a smaller bias towards measurement of stenosis using the de-blooming algorithm (STND: bias 24...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29720418/coral-resistance-to-ocean-acidification-linked-to-increased-calcium-at-the-site-of-calcification
#17
T M DeCarlo, S Comeau, C E Cornwall, M T McCulloch
Ocean acidification threatens the persistence of biogenic calcium carbonate (CaCO3 ) production on coral reefs. However, some coral genera show resistance to declines in seawater pH, potentially achieved by modulating the chemistry of the fluid where calcification occurs. We use two novel geochemical techniques based on boron systematics and Raman spectroscopy, which together provide the first constraints on the sensitivity of coral calcifying fluid calcium concentrations ([Formula: see text]) to changing seawater pH...
May 16, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29716696/evaluation-of-serum-25-hydroxyvitamin-d-levels-in-calcific-rheumatic-mitral-stenosis-a-cross-sectional-study
#18
Jamal Yusuf, Jothinath P, Saibal Mukhopadhyay, Vickram Vignesh, Sanjay Tyagi
BACKGROUND AND AIM OF THE STUDY: Rheumatic mitral stenosis (RMS) is an autoimmune, progressive destructive valve disease occurring as a sequele of streptococcal infection. Epidemiological studies support an association of vitamin D deficiency with initial susceptibility and severity of autoimmune diseases. The aim of the present study was to assess serum level of 25 hydroxyvitamin D in subjects of RMS and assess if any correlation exists with serum levels of vitamin D and severity of disease along with calcification assessed semi-quantitatively by echocardiography by applying Wilkins score...
March 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29715592/fucoidan-vegf-based-surface-modification-of-decellularized-pulmonary-heart-valve-improves-the-antithrombotic-and-re-endothelialization-potential-of-bioprostheses
#19
N Marinval, M Morenc, M N Labour, A Samotus, A Mzyk, V Ollivier, M Maire, K Jesse, K Bassand, A Niemiec-Cyganek, O Haddad, M P Jacob, F Chaubet, N Charnaux, P Wilczek, H Hlawaty
Decellularized porcine heart valves offer promising potential as biocompatible prostheses. However, this procedure alter matrix fibres and glycans, leading to lower biomechanical resistance and increased their thrombotic potential. Therefore, their durability is limited due to calcification and weak regeneration in vivo. Surface modifications are highly requested to improve the scaffolds re-endothelialization required to restore functional and haemocompatible heart valve. Fucoidan, a natural sulphated polysaccharide, carries antithrombotic and anti-inflammatory properties and is known to enhance endothelial adhesion and proliferation when associated with vascular endothelial growth factor (VEGF)...
March 16, 2018: Biomaterials
https://www.readbyqxmd.com/read/29714685/a-slc4-family-bicarbonate-transporter-is-critical-for-intracellular-ph-regulation-and-biomineralization-in-sea-urchin-embryos
#20
Marian Y Hu, Jia-Jiun Yan, Inga Petersen, Nina Himmerkus, Markus Bleich, Meike Stumpp
Efficient pH regulation is a fundamental requisite of all calcifying systems in animals and plants but with the underlying pH regulatory mechanisms remaining largely unknown. Using the sea urchin larva this work identified the SLC4 HCO3 - transporter family member SpSlc4a10 to be critically involved in the formation of an elaborate calcitic endoskeleton. SpSlc4a10 is specifically expressed by calcifying primary mesenchyme cells with peak expression during de novo formation of the skeleton. Knock-down of SpSlc4a10 led to pH regulatory defects accompanied by decreased calcification rates and skeleton deformations...
May 1, 2018: ELife
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