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Colin berry

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https://www.readbyqxmd.com/read/30535365/impaired-coronary-flow-reserve-a-pre-requisite-for-coronary-revascularization
#1
Colin Berry, Frank M Bengel
No abstract text is available yet for this article.
December 6, 2018: Cardiovascular Research
https://www.readbyqxmd.com/read/30509373/contrast-fractional-flow-reserve-attractive-alternative-to-non-hyperaemic-pressure-ratios-for-coronary-disease-evaluation
#2
EDITORIAL
Annette Maznyczka, Colin Berry
No abstract text is available yet for this article.
January 15, 2019: International Journal of Cardiology
https://www.readbyqxmd.com/read/30488106/aortic-stiffness-in-aortic-stenosis-assessed-by-cardiovascular-mri-a-comparison-between-bicuspid-and-tricuspid-valves
#3
Anvesha Singh, Mark A Horsfield, Soliana Bekele, John P Greenwood, Dana K Dawson, Colin Berry, Kai Hogrefe, Damian J Kelly, John G Houston, Prasad Guntur Ramkumar, Akhlaque Uddin, Toru Suzuki, Gerry P McCann
OBJECTIVES: To compare aortic size and stiffness parameters on MRI between bicuspid aortic valve (BAV) and tricuspid aortic valve (TAV) patients with aortic stenosis (AS). METHODS: MRI was performed in 174 patients with asymptomatic moderate-severe AS (mean AVAI 0.57 ± 0.14 cm2 /m2 ) and 23 controls on 3T scanners. Valve morphology was available/analysable in 169 patients: 63 BAV (41 type-I, 22 type-II) and 106 TAV. Aortic cross-sectional areas were measured at the level of the pulmonary artery bifurcation...
November 28, 2018: European Radiology
https://www.readbyqxmd.com/read/30476011/redefining-successful-primary-pci
#4
Peter J McCartney, Colin Berry
No abstract text is available yet for this article.
November 21, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/30461776/design-of-a-sensitive-uncooled-thermal-imager-based-on-a-liquid-crystal-fabry-perot-interferometer
#5
Colin McGinty, Robert Reich, Harry Clark, Valerie Finnemeyer, Shaun Berry, Philip Bos
Microbolometers are the dominant technology for uncooled thermal imaging; however, devices based on a direct retardation measurement of a liquid crystal (LC) transducer pixel have been shown to have comparable sensitivity. In this paper, an approach for increasing LC transducer sensitivity utilizing an etalon structure is considered. A detailed design for an LC resonant cavity between dielectric mirrors is proposed and the performance is evaluated numerically. The measured quantity is the transmission of a visible wavelength through the etalon, which requires no thermal contact with the IR sensor...
October 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/30457480/circumferential-strain-predicts-major-adverse-cardiovascular-events-following-an-acute-st-segment-elevation-myocardial-infarction
#6
Kenneth Mangion, David Carrick, Jaclyn Carberry, Ahmed Mahrous, Christie McComb, Keith G Oldroyd, Hany Eteiba, Mitchell Lindsay, Margaret McEntegart, Stuart Hood, Mark C Petrie, Stuart Watkins, Andrew Davie, Xiaodong Zhong, Frederick H Epstein, Caroline E Haig, Colin Berry
Purpose To investigate the prognostic value of circumferential left ventricular (LV) strain measured by using cardiac MRI for prediction of major adverse cardiac events (MACE) following an acute ST-segment-elevation myocardial infarction (STEMI). Materials and Methods Participants with acute STEMI were prospectively enrolled from May 11, 2011, to November 22, 2012. Cardiac MRI was performed at 1.5 T during the index hospitalization. Displacement encoding with stimulated echoes (DENSE) and feature tracking of cine cardiac MRI was used to assess circumferential LV strain...
November 20, 2018: Radiology
https://www.readbyqxmd.com/read/30371237/coronary-thermodilution-waveforms-after-acute-reperfused-st-segment-elevation-myocardial-infarction-relation-to-microvascular-obstruction-and-prognosis
#7
Shu Ning Yew, David Carrick, David Corcoran, Nadeem Ahmed, Jaclyn Carberry, Vannesa Teng Yue May, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Mitchell Lindsay, Stuart Hood, Stuart Watkins, Andrew Davie, Ahmed Mahrous, Ify Mordi, Ian Ford, Keith G Oldroyd, Colin Berry
Background Invasive measures of microvascular resistance in the culprit coronary artery have potential for risk stratification in acute ST-segment-elevation myocardial infarction. We aimed to investigate the pathological and prognostic significance of coronary thermodilution waveforms using a diagnostic guidewire. Methods and Results Coronary thermodilution was measured at the end of percutaneous coronary intervention, (PCI) and contrast-enhanced cardiac magnetic resonance imaging (MRI) was intended on day 2 and 6 months later to assess left ventricular (LV) function and pathology...
August 7, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/30286907/spotlight-on-strain-following-myocardial-infarction
#8
EDITORIAL
Colin Berry, Kenneth Mangion, Faraz Pathan
No abstract text is available yet for this article.
October 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/30266608/stratified-medical-therapy-using-invasive-coronary-function-testing-in-angina-cormica-trial
#9
Thomas J Ford, Bethany Stanley, Richard Good, Paul Rocchiccioli, Margaret McEntegart, Stuart Watkins, Hany Eteiba, Aadil Shaukat, Mitchell Lindsay, Keith Robertson, Stuart Hood, Ross McGeoch, Robert McDade, Eric Yii, Novalia Sidik, Peter McCartney, David Corcoran, Damien Collison, Christopher Rush, Alex McConnachie, Rhian M Touyz, Keith G Oldroyd, Colin Berry
BACKGROUND: Angina without obstructive epicardial coronary artery disease (CAD) is a common problem with distinct underlying causes. OBJECTIVE: To test the hypothesis that stratified medical therapy guided by an interventional diagnostic procedure (IDP) improves patient outcomes. METHODS: We conducted a randomized, controlled, blinded clinical trial of stratified medical therapy versus standard care in patients with angina. We recruited patients with angina undergoing invasive coronary angiography (standard care)...
September 19, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/30231886/society-for-cardiovascular-magnetic-resonance-scmr-expert-consensus-for-cmr-imaging-endpoints-in-clinical-research-part-i-analytical-validation-and-clinical-qualification
#10
REVIEW
Valentina O Puntmann, Silvia Valbuena, Rocio Hinojar, Steffen E Petersen, John P Greenwood, Christopher M Kramer, Raymond Y Kwong, Gerry P McCann, Colin Berry, Eike Nagel
Cardiovascular disease remains a leading cause of morbidity and mortality globally. Changing natural history of the disease due to improved care of acute conditions and ageing population necessitates new strategies to tackle conditions which have more chronic and indolent course. These include an increased deployment of safe screening methods, life-long surveillance, and monitoring of both disease activity and tailored-treatment, by way of increasingly personalized medical care. Cardiovascular magnetic resonance (CMR) is a non-invasive, ionising radiation-free method, which can support a significant number of clinically relevant measurements and offers new opportunities to advance the state of art of diagnosis, prognosis and treatment...
September 20, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/30213322/prognostic-value-of-the-residual-syntax-score-after-functionally-complete-revascularization-in-acs
#11
Yuhei Kobayashi, Jacob Lønborg, Andy Jong, Takeshi Nishi, Bernard De Bruyne, Dan Eik Høfsten, Henning Kelbæk, Jamie Layland, Chang-Wook Nam, Nico H J Pijls, Pim A L Tonino, Julie Warnøe, Keith G Oldroyd, Colin Berry, Thomas Engstrøm, William F Fearon
BACKGROUND: The residual SYNTAX (Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery) score (RSS) quantitatively assesses angiographic completeness of revascularization after percutaneous coronary intervention (PCI) and has been shown to be a predictor of events after angiography-guided PCI. In stable patients undergoing functionally complete revascularization with fractional flow reserve (FFR) guidance, RSS did not predict outcome. Whether this is also true in patients with acute coronary syndromes (ACS) is unknown...
September 18, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/30170853/high-sensitivity-troponin-in-the-evaluation-of-patients-with-suspected-acute-coronary-syndrome-a-stepped-wedge-cluster-randomised-controlled-trial
#12
RANDOMIZED CONTROLLED TRIAL
Anoop S V Shah, Atul Anand, Fiona E Strachan, Amy V Ferry, Kuan Ken Lee, Andrew R Chapman, Dennis Sandeman, Catherine L Stables, Philip D Adamson, Jack P M Andrews, Mohamed S Anwar, John Hung, Alistair J Moss, Rachel O'Brien, Colin Berry, Iain Findlay, Simon Walker, Anne Cruickshank, Alan Reid, Alasdair Gray, Paul O Collinson, Fred S Apple, David A McAllister, Donogh Maguire, Keith A A Fox, David E Newby, Christopher Tuck, Ronald Harkess, Richard A Parker, Catriona Keerie, Christopher J Weir, Nicholas L Mills
BACKGROUND: High-sensitivity cardiac troponin assays permit use of lower thresholds for the diagnosis of myocardial infarction, but whether this improves clinical outcomes is unknown. We aimed to determine whether the introduction of a high-sensitivity cardiac troponin I (hs-cTnI) assay with a sex-specific 99th centile diagnostic threshold would reduce subsequent myocardial infarction or cardiovascular death in patients with suspected acute coronary syndrome. METHODS: In this stepped-wedge, cluster-randomised controlled trial across ten secondary or tertiary care hospitals in Scotland, we evaluated the implementation of an hs-cTnI assay in consecutive patients who had been admitted to the hospitals' emergency departments with suspected acute coronary syndrome...
September 15, 2018: Lancet
https://www.readbyqxmd.com/read/30165438/systemic-microvascular-dysfunction-in-microvascular-and-vasospastic-angina
#13
Thomas J Ford, Paul Rocchiccioli, Richard Good, Margaret McEntegart, Hany Eteiba, Stuart Watkins, Aadil Shaukat, Mitchell Lindsay, Keith Robertson, Stuart Hood, Eric Yii, Novalia Sidik, Adam Harvey, Augusto C Montezano, Elisabeth Beattie, Laura Haddow, Keith G Oldroyd, Rhian M Touyz, Colin Berry
Aims: Coronary microvascular dysfunction and/or vasospasm are potential causes of ischaemia in patients with no obstructive coronary artery disease (INOCA). We tested the hypothesis that these patients also have functional abnormalities in peripheral small arteries. Methods and results: Patients were prospectively enrolled and categorised as having microvascular angina (MVA), vasospastic angina (VSA) or normal control based on invasive coronary artery function tests incorporating probes of endothelial and endothelial-independent function (acetylcholine and adenosine)...
August 27, 2018: European Heart Journal
https://www.readbyqxmd.com/read/30090605/the-failure-of-rodent-carcinogenesis-as-a-model-for-man
#14
REVIEW
Colin Berry
Recent advances in our understanding of the process of carcinogenesis in Man have required revision of our thinking about the classical initiation/promotion sequence; understanding must now encompass the roles of both genetic and epigenetic change, realisation of the importance of the variable genetic backgrounds of the tumour bearers in any group and an understanding of the importance of random genetic events over time. The behavior of tumours, once established, is more complex than has been thought. Current views of the processes involved are not modelled in toxicity testing programmes...
July 1, 2018: Toxicology Research
https://www.readbyqxmd.com/read/30031722/sex-differences-in-adenosine-free-coronary-pressure-indexes-a-contrast-substudy
#15
Sonia V Shah, Frederik M Zimmermann, Nils P Johnson, Takeshi Nishi, Yuhei Kobayashi, Nils Witt, Colin Berry, Allen Jeremias, Bon-Kwon Koo, Giovanni Esposito, Gilles Rioufol, Seung-Jung Park, Keith G Oldroyd, Emanuele Barbato, Nico H J Pijls, Bernard De Bruyne, William F Fearon
OBJECTIVES: The goal of this study was to investigate sex differences in adenosine-free coronary pressure indexes. BACKGROUND: Several adenosine-free coronary pressure wire indexes have been proposed to assess the functional significance of coronary artery lesions; however, there is a theoretical concern that sex differences may affect diagnostic performance because of differences in resting flow and distal myocardial mass. METHODS: In this CONTRAST (Can Contrast Injection Better Approximate FFR Compared to Pure Resting Physiology?) substudy, contrast fractional flow reserve (cFFR), obtained during contrast-induced submaximal hyperemia, the instantaneous wave-free ratio (iFR), and distal/proximal coronary pressure ratio (Pd/Pa) were compared with fractional flow reserve (FFR) in 547 men and 216 women...
August 13, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/30031700/current-smoking-and-prognosis-after-acute-st-segment-elevation-myocardial-infarction-new-pathophysiological-insights
#16
Caroline Haig, David Carrick, Jaclyn Carberry, Kenneth Mangion, Annette Maznyczka, Kirsty Wetherall, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Mitchell Lindsay, Stuart Hood, Stuart Watkins, Andrew Davie, Ahmed Mahrous, Ify Mordi, Nadeem Ahmed, Vannesa Teng Yue May, Ian Ford, Aleksandra Radjenovic, Paul Welsh, Naveed Sattar, Keith G Oldroyd, Colin Berry
OBJECTIVES: The aim of this study was to mechanistically investigate associations among cigarette smoking, microvascular pathology, and longer term health outcomes in patients with acute ST-segment elevation myocardial infarction (MI). BACKGROUND: The pathophysiology of myocardial reperfusion injury and prognosis in smokers with acute ST-segment elevation MI is incompletely understood. METHODS: Patients were prospectively enrolled during emergency percutaneous coronary intervention...
July 13, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/30030335/cessation-of-dual-antiplatelet-therapy-and-cardiovascular-events-following-acute-coronary-syndrome
#17
Wardati Mazlan-Kepli, Jesse Dawson, Colin Berry, Matthew Walters
OBJECTIVE: To assess whether cardiovascular events are increased after cessation of dual antiplatelet therapy (DAPT) following acute coronary syndrome (ACS) and to explore predictors for recurrent events after DAPT cessation during long-term follow-up. METHODS: We did a retrospective observational cohort study. We included consecutive people with ACS who were discharged from Scottish hospitals between January 2008 and December 2013 and who received DAPT after discharge followed by antiplatelet monotherapy...
July 20, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/30017904/obfuscating-transparency
#18
EDITORIAL
Michael Aschner, Herman Autrup, Colin L Berry, Alan R Boobis, Samuel M Cohen, Wolfgang Dekant, Corrado L Galli, Jay I Goodman, Gio B Gori, Helmut A Greim, Norbert E Kaminski, Curtis D Klaassen, James E Klaunig, Marcello Lotti, Hans Wj Marquardt, Angelo Moretto, Olavi Pelkonen, I Glenn Sipes, Kendall B Wallace, Hiroshi Yamazaki
Several recent and prominent articles in Science and Nature deliberately mischaracterized the nature of genuine scientific evidence. Those articles take issue with the United States Environmental Protection Agency's recent proposal to structure its policies and rules only from studies with transparently published raw data. The articles claim it is an effort to obfuscate with transparency, by eliminating a host of studies not offering raw data. A remarkable declaration by a Science editorial is that properly trained experts can verify the scientific evidence of studies without access to raw data, We assert the Agency's proposal must be sustained...
August 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/30012869/hypertension-microvascular-pathology-and-prognosis-after-an-acute-myocardial-infarction
#19
David Carrick, Caroline Haig, Annette M Maznyczka, Jaclyn Carberry, Kenneth Mangion, Nadeem Ahmed, Vannesa Teng Yue May, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Mitchell Lindsay, Stuart Hood, Stuart Watkins, Andrew Davie, Ahmed Mahrous, Ify Mordi, Ian Ford, Aleksandra Radjenovic, Paul Welsh, Naveed Sattar, Kirsty Wetherall, Keith G Oldroyd, Colin Berry
The rationale for our study was to investigate the pathophysiology of microvascular injury in patients with acute ST-segment-elevation myocardial infarction in relation to a history of hypertension. We undertook a cohort study using invasive and noninvasive measures of microvascular injury, cardiac magnetic resonance imaging at 2 days and 6 months, and assessed health outcomes in the longer term. Three hundred twenty-four patients with acute myocardial infarction (mean age, 59 [12] years; blood pressure, 135 [25] / 79 [14] mm Hg; 237 [73%] male, 105 [32%] with antecedent hypertension) were prospectively enrolled during emergency percutaneous coronary intervention...
September 2018: Hypertension
https://www.readbyqxmd.com/read/30002302/process-for-a-reactive-monomer-alignment-layer-for-liquid-crystals-formed-on-an-azodye-sublayer
#20
Junren Wang, Colin McGinty, Robert Reich, Valerie Finnemeyer, Harry Clark, Shaun Berry, Philip Bos
In this work, the detailed studies of surface polymerization stabilizing liquid crystal formed on an azodye sublayer are presented. The surface localized stabilization is obtained by free-radical polymerization of a dilute solution of a bi-functional reactive monomer (RM) in a liquid crystal (LC) solvent. To optimize the process for surface localized stabilization, we investigate the effects of several process parameters including RM concentration in LC hosts, the types of materials (either RM or LC), the photo-initiator (PI) concentration, ultra-violet (UV) polymerization intensity, and the UV curing temperature...
July 12, 2018: Materials
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