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John W Pickering, Jaimi H Greenslade, Louise Cullen, Dylan Flaws, William Parsonage, Sally Aldous, Peter George, Andrew Worster, Peter A Kavsak, Martin P Than
BACKGROUND: -The European Society of Cardiology (ESC) new guidelines to rule-in and rule-out acute myocardial infarction (AMI) in the emergency department (ED) include a rapid assessment algorithm based on high-sensitivity cardiac troponin and sampling at zero and one hour. ED physicians require very high sensitivity to confidently rule-out AMI, while cardiologists aim to minimise false positive results. METHODS: -High-sensitivity troponin I (hs-cTnI) and T (hs-cTnT) assays were used to measure troponin concentrations in patients presenting with chest-pain symptoms and being investigated for possible acute coronary syndrome at hospitals in New Zealand, Australia and Canada...
October 17, 2016: Circulation
Lieke J J Klinkenberg, Karin Wildi, Noreen van der Linden, Imre W K Kouw, Marijke Niens, Raphael Twerenbold, Maria Rubini Gimenez, Christian Puelacher, Jean Daniel Neuhaus, Petra Hillinger, Thomas Nestelberger, Jasper Boeddinghaus, Karin Grimm, Zaid Sabti, Judith A P Bons, Jeroen D E van Suijlen, Frans E S Tan, Joop Ten Kate, Otto Bekers, Luc J C van Loon, Marja P van Dieijen-Visser, Christian Mueller, Steven J R Meex
BACKGROUND: Interpretation of serial high-sensitivity cardiac troponin (hs-cTn) measurements for the diagnosis of acute myocardial infarction (AMI) assumes random fluctuation of hs-cTn around an individual's homeostatic set point. The aim of this study was to challenge this diagnostic concept. METHODS: Study 1 examined the presence of a diurnal hs-cTn rhythm by hourly blood sampling, day and night, in 24 individuals without a recent history of AMI. Study 2 assessed morning vs evening diagnostic accuracy of hs-cTnT and hs-cTnI in a prospective multicenter diagnostic study of 2782 unselected patients, presenting to the emergency department with acute chest pain...
October 5, 2016: Clinical Chemistry
Øyvind Skadberg, Sverre Sandberg, Thomas Røraas, Per Hyltoft Petersen, Hilde Sellevoll, Einar Svarstad, Kristin Sæle, Kristin Moberg Aakre
BACKGROUND: Cardiovascular mortality is high in end stage renal disease (ESRD). This study aimed to: (1) calculate within-week within- and between-subject biological variation (CVI and CVG) for hs-cTn in ESRD; (2) determine the magnitude of hs-cTn concentration changes during haemodialysis (HD) treatment; and (3) compare the CVI and CVG to the within and between-subject variation of cTn concentration changes during HD treatments (CVDIFF-I and CVDIFF-G). METHODS: Serum samples were collected from 20 patients before and after 10 consecutive HD treatments...
October 5, 2016: Scandinavian Journal of Clinical and Laboratory Investigation
Magdalena Krintus, Marek Kozinski, Tomasz Fabiszak, Magdalena Kuligowska-Prusinska, Ewa Laskowska, Lieselotte Lennartz, Lena Nowak-Los, Jacek Kubica, Grazyna Sypniewska
OBJECTIVES: i) To assess the relationship between lipid markers and high-sensitivity C-reactive protein (hs-CRP), and high-sensitivity cardiac troponin I (hs-cTnI) in the reference population, and ii) to evaluate the impact of lipid markers and hs-CRP on the 99th percentile upper reference limit (URL) for hs-cTnI. METHODS: 531 questionnaire-identified presumably healthy individuals were enrolled in a single-center, cross-sectional study. Surrogate biomarkers for diabetes, myocardial and renal dysfunction were used to refine the healthy cohort (n=408)...
November 1, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
Yali Zhang, Hong Wang, Xuexin Yu, Yanlin Xing, Ce Wang, Rong He
OBJECTIVE: To compare the changes in muscle enzyme between children with myocarditis and Duchene/Becker muscular dystrophy (DMD/BMD), and to seek the explanations for variation.
 METHODS: The retrospective analysis for 83 myocarditis children (myocarditis group) and 69 DMD/BMD children (DMD/BMD group), who were collected from Department of Pediatric of Shengjing Hospital affiliated to China Medical University since January 2008 to May 2015, was carried out. At the same time, 24 healthy children from the Department of Pediatric Development served as a control group...
September 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
Pranoti Hiremath, Patrick R Lawler, Jennifer E Ho, Andrew W Correia, Siddique A Abbasi, Raymond Y Kwong, Michael Jerosch-Herold, Carolyn Y Ho, Susan Cheng
BACKGROUND: The noninvasive assessment of altered myocardium in patients with genetic mutations that are associated with hypertrophic cardiomyopathy (HCM) remains challenging. In this pilot study, we evaluated whether a novel echocardiography-based assessment of myocardial microstructure, the signal intensity coefficient (SIC), could detect tissue-level alterations in HCM sarcomere mutation carriers with and without left ventricular hypertrophy. METHODS AND RESULTS: We studied 3 groups of genotyped individuals: sarcomere mutation carriers with left ventricular hypertrophy (clinical HCM; n=36), mutation carriers with normal left ventricular wall thickness (subclinical HCM; n=28), and healthy controls (n=10)...
September 2016: Circulation. Heart Failure
A Nordin, E Svenungsson, L Björnådal, K Elvin, A Larsson, K Jensen-Urstad
OBJECTIVES: Cardiac manifestations in systemic sclerosis (SSc) are associated with poor prognosis. Few studies have investigated cardiac troponins in SSc. We studied the relationships between echocardiographic abnormalities, cardiac biomarkers, and disease manifestations in a population-based cohort of patients with SSc and controls. METHOD: The study comprised 110 patients with SSc and 105 age- and sex-matched population-based controls. We examined ventricular function, heart valves, and estimated pulmonary arterial pressure (ePAP) by echocardiography in all participants...
September 7, 2016: Scandinavian Journal of Rheumatology
Joanna M Young, John W Pickering, Peter M George, Sally J Aldous, John Wallace, Chris M Frampton, Richard W Troughton, Mark A Richards, Jaimi H Greenslade, Louise Cullen, Martin P Than
BACKGROUND: Improved ability to rapidly rule-out Acute Myocardial Infarction (AMI) in patients presenting with chest pain will promote decongestion of the Emergency Department (ED) and reduce unnecessary hospital admissions. We assessed a new commercial Heart Fatty Acid Binding Protein (H-FABP) assay for additional diagnostic value when combined with cardiac troponin (using a high sensitivity assay). METHODS: H-FABP and high-sensitivity troponins I (hs-cTnI) and T (hs-cTnT) were measured in samples taken on-presentation from patients, attending the ED, with symptoms triggering investigation for possible acute coronary syndrome...
2016: BMC Emergency Medicine
Feifei Li, Jinlei Nie, Yifan Lu, Tom Kwok Keung Tong, Longyan Yi, Huiping Yan, Frank Hoo Kin Fu, Shengxia Ma
PURPOSE: To investigate the effects of hypoxic training on redox status and cardiac troponin (cTn) release after intermittent exercise. METHOD: Nine well-trained male marathon runners (age, 21.7 ± 2.3 year; body mass, 64.7 ± 4.8 kg; height, 177.9 ± 3.8 cm; and VO2max, 64.3 ± 6.7 ml kg(-1) min(-1)) completed intermittent exercise under normoxic [trial N; fraction of inspiration oxygen (FIO2), 21.0 %] and hypoxic (trial H; FIO2, 14.4 %) conditions in random order...
October 2016: European Journal of Applied Physiology
Jonas Oldgren, Ziad Hijazi, Johan Lindbäck, John H Alexander, Stuart J Connolly, John W Eikelboom, Michael D Ezekowitz, Christopher B Granger, Elaine M Hylek, Renato D Lopes, Agneta Siegbahn, Salim Yusuf, Lars Wallentin
BACKGROUND: -Atrial fibrillation (AF) is associated with increased but variable risk of stroke. Our aim was to validate the recently developed biomarker-based ABC-stroke risk score and compare its performance with the CHA2DS2VASc and ATRIA risk scores. METHODS: -ABC-stroke score includes Age, Biomarkers (NT-proBNP and high-sensitivity [hs] troponin [cTn]), and Clinical history (prior stroke). This validation was based on 8,356 patients, 16,137 person-years of follow-up, and 219 adjudicated stroke or systemic embolic (SE) events in anticoagulated patients with AF in the RE-LY study...
August 28, 2016: Circulation
K L Hemalatha, P Stanely Mainzen Prince
Myocardial infarction continues to be a major public health problem. Reduction in mortality rate and prevention of myocardial infarction are of utmost importance. Inflammation and thrombosis play an important role in the pathogenesis of myocardial infarction. The anti-inflammatory and anti-thrombotic effects of zingerone were evaluated in isoproterenol induced myocardial infarcted rats. Rats were pretreated with zingerone (6mg/kg body weight) daily for 14 days and were then induced myocardial infarction with isoproterenol (100mg/kg body weight) on 15th and 16th day...
August 26, 2016: European Journal of Pharmacology
Matthias Bossard, Sébastien Thériault, Stefanie Aeschbacher, Tobias Schoen, Seraina Kunz, Mirco von Rotz, Joel Estis, John Todd, Martin Risch, Christian Mueller, Lorenz Risch, Guillaume Paré, David Conen
BACKGROUND: Determinants of cardiomyocyte injury as quantified by high-sensitivity cardiac troponin I (cTnI) in young and healthy individuals, and sex-specific 99th percentiles are largely unknown. METHODS: Our study included 2077 adults from the general population aged 25-41 years without cardiovascular disease. cTnI was measured using a high-sensitivity assay. We performed stepwise backward linear regression analyses to identify variables independently associated with hs-cTnI levels, and calculated narrow-sense heritability from 1638-genotyped participants...
August 17, 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Jonathan H Kim, Yi-An Ko, Jeff Hedley, James MacNamara, Mosaab Awad, William Taylor, Sean Healy, Hiroshi Aida, Ngoc-Anh Le, Peter W Wilson, Melissa White, Laurence S Sperling, Joseph S Wilson, Aaron L Baggish
OBJECTIVE: Exercise-induced cardiac dysfunction and corollary biomarker release have been documented following long-distance running events. To what degree these processes occur during shorter distance running events is unknown. METHODS: 72 healthy recreational runners (54% male/46% female) recruited by age (group 1 (18-20 years old, N=19); group 2 (45-50 years old, N=27); group 3 (70-75 years old, N=26)) were studied with echocardiography and biochemical profiling during participation in a 10 km running race...
August 16, 2016: Heart: Official Journal of the British Cardiac Society
Kirstine Roll Vestergaard, Camilla Bang Jespersen, Asthildur Arnadottir, György Sölétormos, Morten Schou, Rolf Steffensen, Jens P Goetze, Erik Kjøller, Kasper K Iversen
BACKGROUND: Cardiac troponin T and I are important diagnostic and prognostic markers in patients with acute coronary syndrome (ACS). Troponin elevations in various non-ACS scenarios have been documented, but few studies have been conducted on the general hospitalized population, none compared the diagnostic performance of troponin I and T. METHODS AND RESULTS: Patients aged >18years (n=1097), consecutively admitted to a district hospital, were included in the study...
November 1, 2016: International Journal of Cardiology
Ruijuan Han, Xiaoqing Liu, XianDong Yin, Meili Zheng, Kai Sun, Xingpeng Liu, Ying Tian, Xinchun Yang
BACKGROUND: Remote ischemic preconditioning (RIPC) has been suggested to reduce postoperative release of cardiac and inflammatory markers in patients undergoing cardiac surgery. This study aimed to evaluate the effect of RIPC on nonischemic myocardial damage and inflammatory response in patients undergoing radiofrequency catheter ablation for paroxysmal atrial fibrillation (AF). METHODS: Seventy-two patients with drug-refractory paroxysmal AF undergoing radiofrequency catheter ablation were randomized into RIPC or control groups...
November 1, 2016: International Journal of Cardiology
Vikramshankar Kamakoti, Anjan Panneer Selvam, Nandhinee Radha Shanmugam, Sriram Muthukumar, Shalini Prasad
Molybdenum electrode based flexible biosensor on porous polyamide substrates has been fabricated and tested for its functionality as a protein affinity based biosensor. The biosensor performance was evaluated using a key cardiac biomarker; cardiac Troponin-I (cTnI). Molybdenum is a transition metal and demonstrates electrochemical behavior upon interaction with an electrolyte. We have leveraged this property of molybdenum for designing an affinity based biosensor using electrochemical impedance spectroscopy...
July 18, 2016: Biosensors
Sara A Love, Yader Sandoval, Stephen W Smith, Jennifer Nicholson, Jing Cao, Ranka Ler, Karen Schulz, Fred S Apple
INTRODUCTION: We compared the incidence of undetectable [below the limit of detection (LoD)], measurable (LoD to 99th percentile), and increased cardiac troponin I (cTnI) concentrations above the 99th percentile between Abbott high-sensitivity cTnI (hs-cTnI) and contemporary cTnI assays in a US emergency department population. METHODS: Patients (n = 2100) presenting to the emergency department who had serial cTnI (0, 3, 6, 9 h) measurements ordered on clinical indication were enrolled...
August 2016: Clinical Chemistry
Feng Kai, Liu Lifeng, Song Haijing, Liu Xianhua, Xia Hu
OBJECTIVE: To investigate the predictive value of 4,183 Da peptide of dermcidin protein in the early diagnosis and differential diagnosis of ischemic heart disease. METHODS: A prospective controlled study was conducted. Serum samples were drawn from 161 patients with acute coronary'syndrome [ACS, including 46 patients with unstable angina (UA), 23 with acute non-ST elevation myocardial infarction, and 92 with acute ST segment elevation myocardial infarction], 111 subjects for routine physical examination, including 45 patients with hypertension history, 42 with coronary heart disease, 22 with diabetes, and 54 patients with non-ACS (including pulmonary embolism, aortic dissection, aneurysm, arrhythmia, myocarditis, coronary myocardial bridge, pleurisy, pneumothorax pneumomediastinum, rib fracture, reflux esophagitis, peptic ulcer, and pancreatitis) to serve as controls...
December 2015: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Lieke J J Klinkenberg, Peter Luyten, Noreen van der Linden, Kim Urgel, Daniëlle P C Snijders, Christian Knackstedt, Robert Dennert, Bastiaan L J H Kietselaer, Alma M A Mingels, Eline P M Cardinaels, Frederique E C M Peeters, Jeroen D E van Suijlen, Joop Ten Kate, Elke Marsch, Thomas L Theelen, Judith C Sluimer, Kristiaan Wouters, Otto Bekers, Sebastiaan C A M Bekkers, Luc J C van Loon, Marja P van Dieijen-Visser, Steven J R Meex
Prolonged endurance-type exercise is associated with elevated cardiac troponin (cTn) levels in asymptomatic recreational athletes. It is unclear whether exercise-induced cTn release mirrors a physiological or pathological underlying process. The aim of this study was to provide a direct comparison of the release kinetics of high-sensitivity cTnI (hs-cTnI) and T (hs-cTnT) after endurance-type exercise. In addition, the effect of remote ischemic preconditioning (RIPC), a cardioprotective strategy that limits ischemia-reperfusion injury, was investigated in a randomized controlled crossover manner...
July 15, 2016: American Journal of Cardiology
S Badiou, A Boudet, H Leray-Moragues, A Rodriguez, A S Bargnoux, A M Dupuy, J P Cristol
PURPOSE OF RESEARCH: Circulating cardiac troponin (cTn) has been identified as a risk factor for cardiovascular and overall mortality in patients undergoing hemodialysis. However, its interpretation remains difficult due to the high prevalence of patients with cTn level beyond the 99th percentile. Determining the cTn reference change value (RCV) may help in assessing a clinically significant change of cTn during regular follow-up of patients. We aimed to determine the long-term RCV of cTn in such patients and to calculate the perdialytic reduction rate of cTn...
May 19, 2016: Clinical Biochemistry
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