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Troponin and exercise

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https://www.readbyqxmd.com/read/29184434/manifestation-of-non-st-elevation-myocardial-infarction-due-to-hyperthyroidism-in-an-anomalous-right-coronary-artery
#1
Vicken Zeitjian, Carmel Moazez, Mehrdad Saririan, David L August, Ranjini Roy
Introduction: Anomalous origin of the right coronary artery (RCA) from the left coronary cusp of the aorta is a moderately rare but potentially life-threatening incident. Myocardial infarction (MI) and sudden cardiac death have been described with this anomaly, especially in those who engage in excessive exercise. However, this case study shows this incidence in association with hyperthyroidism. Case description: A previously healthy 51-year-old female with history of hypothyroidism presented with acute onset chest pain for 1 day...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/29183152/marathon-running-increases-circulating-endothelial-and-thrombocyte-derived-microparticles
#2
Viktoria Schwarz, Philip Düsing, Thomas Liman, Christian Werner, Juliane Herm, Katrin Bachelier, Matthias Krüll, Lars Brechtel, Gerhard J Jungehulsing, Wilhelm Haverkamp, Michael Böhm, Matthias Endres, Karl Georg Haeusler, Ulrich Laufs
Background Acute vascular effects of high intensity physical activity are incompletely characterized. Circulating microparticles are cellular markers for vascular activation and damage. Methods Microparticles were analysed in 99 marathon runners (49 ± 6 years, 22% female) of the prospective Berlin Beat of Running study. Blood samples were taken within three days before, immediately after and within two days after the marathon run. Endothelial-derived microparticles were labelled with CD144, CD31 and CD62E, platelet-derived microparticles with CD62P and CD42b, leukocyte-derived microparticles with CD45 and monocyte-derived microparticles with CD14...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29177058/biomarkers-of-cardiovascular-stress-and-fibrosis-in-preclinical-hypertrophic-cardiomyopathy
#3
Jennifer E Ho, Ling Shi, Sharlene M Day, Steven D Colan, Mark W Russell, Jeffrey A Towbin, Mark V Sherrid, Charles E Canter, John Lynn Jefferies, Anne Murphy, Matthew Taylor, Luisa Mestroni, Allison L Cirino, Lynn A Sleeper, Peter Jarolim, Begoña Lopez, Arantxa Gonzalez, Javier Diez, E John Orav, Carolyn Y Ho
Objective: Sarcomeric gene mutation carriers without overt left ventricular hypertrophy (G+/LVH-) can harbour subclinical changes in cardiovascular structure and function that precede the development of hypertrophic cardiomyopathy (HCM). We sought to investigate if circulating biomarkers of cardiovascular stress and collagen metabolism among G+/LVH- individuals, measured at rest and following exercise provocation, yield further insights into the underlying biology of HCM. Methods: We studied 76 individuals with overt HCM, 50 G+/LVH- individuals and 41 genotype-negative related controls enrolled in a cross-sectional, multicentre observational study (HCMNet)...
2017: Open Heart
https://www.readbyqxmd.com/read/29173327/cardiac-biomarker-release-after-endurance-exercise-in-male-and-female-adults-and-adolescents
#4
Alejandro Legaz-Arrese, Luis E Carranza-García, Ricardo Navarro-Orocio, Alberto Valadez-Lira, Carmen Mayolas-Pi, Diego Munguía-Izquierdo, Joaquín Reverter-Masía, Keith George
OBJECTIVES: To compare the responses of high-sensitivity cardiac troponin T (hs-cTnT) and NH2-terminal probrain natriuretic peptide (NT-proBNP) after 60 minutes of swimming in male and female adults and adolescents with different pubertal status. STUDY DESIGN: Adolescent swimmers (25 male and 25 female) and adult swimmers (7 male and 9 female) participated in a 60-minute maximal swimming test with serial assessment of hs-cTnT and NT-proBNP at rest, immediately postexercise, and at 1, 3, 6, 12, and 24 hours postexercise...
December 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29171090/24-hour-kinetics-of-cardiac-troponin-t-using-a-high-sensitivity-assay-in-thoroughbred-chuckwagon-racing-geldings-after-race-and-associated-clinical-sampling-guidelines
#5
E Shields, I Seiden-Long, S Massie, R Leguillette
BACKGROUND: A "high-sensitivity" cardiac troponin-T (hscTnT) assay recently has been validated for use in horses and is a specific biomarker of myocardial damage. Postexercise release kinetics of cTnT utilizing the hscTnT assay have yet to be established in horses. OBJECTIVES: To determine: (1) cTnT release kinetics in racing Thoroughbreds after a high-intensity 5/8th mile Chuckwagon race; (2) the effects of age on pre- and postrace cTnT concentrations; and (3) sampling guidelines for clinicians evaluating horses presenting after exercise...
November 24, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29110150/the-effect-of-an-aerobic-exercise-bout-24%C3%A2-h-prior-to-each-doxorubicin-treatment-for-breast-cancer-on-markers-of-cardiotoxicity-and-treatment-symptoms-a-rct
#6
Amy A Kirkham, Neil D Eves, Rob E Shave, Kelcey A Bland, Joshua Bovard, Karen A Gelmon, Sean A Virani, Don C McKenzie, Eric J Stöhr, Darren E R Waburton, Kristin L Campbell
PURPOSE: In rodents, a single exercise bout performed 24 h prior to a single doxorubicin treatment provides cardio-protection. This study investigated whether performing this intervention prior to every doxorubicin treatment for breast cancer reduced subclinical cardiotoxicity and treatment symptoms. METHODS: Twenty-four women with early stage breast cancer were randomly assigned to perform a 30-min, vigorous-intensity treadmill bout 24 h prior to each of four doxorubicin-containing chemotherapy treatments or to usual care...
November 6, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29108664/the-effect-of-acute-and-7-days-dietary-nitrate-on-mechanical-efficiency-exercise-performance-and-cardiac-biomarkers-in-patients-with-chronic-obstructive-pulmonary-disease
#7
Rosanne J H C G Beijers, Stephanie M D Huysmans, Coby van de Bool, Boris R M Kingma, Lex B Verdijk, Luc J C van Loon, Steven J R Meex, Harry R Gosker, Annemie M W J Schols
BACKGROUND & AIMS: Many COPD patients have a reduced exercise capacity and mechanical efficiency and are at increased cardiometabolic risk. This study aimed to assess acute and 7-days effects of dietary nitrate on mechanical efficiency, exercise performance and cardiac biomarkers in patients with COPD. METHODS: This double-blind, randomized cross-over placebo controlled trial included 20 mild-to-moderate COPD patients (66.6 ± 7.5 years) with moderate exercise impairments and decreased mechanical efficiency, normal BMI (26 ± 3 kg/m(2)) but high prevalence of abdominal obesity (83...
October 31, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29107010/combining-high-sensitivity-cardiac-troponin-and-b-type-natriuretic-peptide-in-the-detection-of-inducible-myocardial-ischemia
#8
Christian Puelacher, Max Wagener, Ursina Honegger, Mustafa Assadian, Nicolas Schaerli, Deborah Mueller, Ivo Strebel, Raphael Twerenbold, Jasper Boeddinghaus, Thomas Nestelberger, Karin Wildi, Zaid Sabti, Lorraine Sazgary, Patrick Badertscher, Jeanne du Fay de Lavallaz, Stella Marbot, Christoph Kaiser, Damian Wild, Michael J Zellweger, Tobias Reichlin, Christian Mueller
BACKGROUND: Single biomarker approaches provide only moderate accuracy in the non-invasive detection of exercise-induced myocardial ischemia. We therefore assessed the combination of the two most promising single biomarkers: high-sensitivity cardiac troponin I (hs-cTnI) and B-type natriuretic peptide (BNP). METHODS: Consecutive patients with suspected myocardial ischemia referred to stress myocardial perfusion single-photon emission tomography imaging (MPI) were enrolled...
November 8, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/29096906/-exercise-induced-coronary-thrombosis
#9
A Sghaier, S Milouchi, L Ghannem, L Ghannem, M Ghannem
Heavy exertion as a trigger of cardiac events has been known since antiquity as it was already described in 492 BC in the famous Athens Marathon. Myocardial infarction occurring after physical exertion accounts for about 4% of myocardial infarctions. It is more common in men and younger patients. It usually occurs during intense efforts and especially in inactive people with multiple risk factors. It would be more severe with more frequent Q waves of necrosis on the victims' electrocardiograms, with greater troponin release and a more raised GRACE score...
October 30, 2017: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/29072176/premature-coronary-artery-disease-due-to-homozygous-familial-hypercholesterolemia-in-a-12-year-old-girl
#10
Filiz Ekici, Salih Özçobanoğlu, Fırat Kardelen
BACKGROUND: Homozygous familial hypercholesterolemia (HoFH) is a rare inherited metabolic disease, caused by low-density lipoprotein receptor abnormality. Patients with HoFH have an increased risk for cardiovascular complication (CVC) that usually occurs in the first decade of life. We report a twelve years-old girl with unpredicted presentation for coronary artery disease (CAD) and she was found to have HoFH. CASE REPORT: A 12 years old girl was admitted to our unit with syncope...
October 26, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/29064277/high-sensitivity-cardiac-troponins-can-they-help-in-diagnosing-myocardial-ischaemia
#11
Enrico Orsini, Paolo Caravelli, Frank Lloyd Dini, Mario Marzilli
BACKGROUND: Cardiac troponin is the most sensitive marker of myocardial injury, but controversy still exists about its role in detecting ischaemia. METHODS: To investigate the role of troponin as a marker of stress-induced ischaemia, circulating high sensitivity cardiac troponin T (hs-cTnT) was measured and compared with the MB fraction of creatine kinase (CK-MB) in 125 patients undergoing a stress test (53 electrocardiogram/echo exercise, 42 echo dipyridamole and 30 echo dobutamine tests)...
March 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29047154/effects-of-testosterone-enanthate-and-resistance-training-on-myocardium-in-wistar-rats-clinical-and-anatomical-pathology
#12
S Karbasi, M Zaeemi, M Mohri, A Rashidlamir, Z Moosavi
This study was performed to determine the effects of 8 weeks testosterone enanthate (TE) injection and resistance training (RT) on cardiac muscle in male Wistar rats. A total of 28 male adult Wistar rats were randomly divided into 4 groups; control + placebo, RT + placebo, TE and TE + RT. Testosterone enanthate (20 mg/kg BW, IM) and placebo (olive oil; 0.2 ml, IM) were injected twice a week for 2 months. The RT consisted of climbing (5 reps/3 sets) a ladder carrying a load suspended from the tail...
October 18, 2017: Andrologia
https://www.readbyqxmd.com/read/29031332/right-ventricular-function-during-pharmacological-and-exercise-stress-testing-in-horses
#13
A Decloedt, D De Clercq, S Ven, L Vera, G van Loon
The disproportionate rise of pulmonary artery pressure compared to systemic blood pressure during exercise can lead to detrimental right ventricular remodelling in endurance athletes. Horses may act as an extreme model of these athletic cardiovascular adaptations, as they show a three fold increase in pulmonary pressures during exercise. Right ventricular function was examined in ten healthy horses using post-exercise and pharmacological stress echocardiography in a randomised cross-over design. Exercise testing was performed on a treadmill while pharmacological testing was performed using an atropine-dobutamine infusion...
September 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29016754/cardiac-troponins-from-myocardial-infarction-to-chronic-disease
#14
Kyung Chan Park, David C Gaze, Paul O Collinson, Michael S Marber
Elucidation of the physiologically distinct subunits of troponin in 1973 greatly facilitated our understanding of cardiac contraction. Although troponins are expressed in both skeletal and cardiac muscle, there are isoforms of troponin I/T expressed selectively in the heart. By exploiting cardiac-restricted epitopes within these proteins, one of the most successful diagnostic tests to-date has been developed: cardiac troponin (cTn) assays. For the past decade, cTn has been regarded as the gold-standard marker for acute myocardial necrosis: the pathological hallmark of acute myocardial infarction (AMI)...
September 14, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28966053/proteome-analysis-in-dystrophic-mdx-mouse-muscle-reveals-a-drastic-alteration-of-key-metabolic-and-contractile-proteins-after-chronic-exercise-and-the-potential-modulation-by-anti-oxidant-compounds
#15
Tania Gamberi, Tania Fiaschi, Elisa Valocchia, Alessandra Modesti, Paola Mantuano, Jean-Francois Rolland, Francesca Sanarica, Annamaria De Luca, Francesca Magherini
Weakness and fatigability are typical features of Duchenne muscular dystrophy patients and are aggravated in dystrophic mdx mice by chronic treadmill exercise. In the present study, we describe, the pattern of differentially abundant spots that is associated to the worsening of dystrophy phenotype induced by chronic exercise. Our proteomic analysis pointed out 34 protein spots with different abundance between sedentary and exercised mdx mice. These proteins belong mostly to glucose metabolism, energy production and sarcomere structure categories...
January 6, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/28958347/utility-of-growth-differentiation-factor-15-a%C3%A2-marker-of-oxidative-stress-and-inflammation-in-chronic-heart-failure-insights-from-the-hf-action-study
#16
Abhinav Sharma, Susanna R Stevens, Joseph Lucas, Mona Fiuzat, Kirkwood F Adams, David J Whellan, Mark P Donahue, Dalane W Kitzman, Ileana L Piña, Faiez Zannad, William E Kraus, Christopher M O'Connor, G Michael Felker
OBJECTIVES: This study sought to determine the relationship between growth differentiation factor (GDF)-15 and clinical outcomes in ambulatory patients with heart failure and reduced ejection fraction (HFrEF). BACKGROUND: The prognostic utility of GDF-15, a member of the transforming growth factor-β cytokine family, among patients with HF is unclear. METHODS: We assessed GDF-15 levels in 910 patients enrolled in the HF-ACTION (Heart Failure: A Controlled Trial Investigating Outcomes of Exercise Training) trial, a randomized clinical trial of exercise training in patients with HFrEF...
October 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28903763/troponin-as-ischemic-biomarker-is-related-with-all-three-echocardiographic-risk-factors-for-sudden-death-in-hypertrophic-cardiomyopathy-esc-guidelines-2014
#17
Rafał Hładij, Renata Rajtar-Salwa, Paweł Petkow Dimitrow
BACKGROUND: Sudden cardiac death (SCD) risk stratification is the most important preventive action in patients with hypertrophic cardiomyopathy (HCM). The identification of the ischemia biomarker high sensitive troponin I (hs-TnI) role for this arrhythmic disease may provide additional information for SCD risk stratification. The aim of the study was to compare echocardiographic parameters (prognostic for risk stratification of SCD in HCM) among two subgroups of HCM patients: with elevated hs-TnI versus non-elevated hs-TnI level...
September 13, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28817660/cited4-is-related-to-cardiogenic-induction-and-maintenance-of-proliferation-capacity-of-embryonic-stem-cell-derived-cardiomyocytes-during-in-vitro-cardiogenesis
#18
Junichiro Miake, Tomomi Notsu, Katsumi Higaki, Kyoko Hidaka, Takayuki Morisaki, Kazuhiro Yamamoto, Ichiro Hisatome
Cardiac progenitor cells have a limited proliferative capacity. The CREB-binding protein/p300-interacting transactivator, with the Glu/Asp-rich carboxy-terminal domain (Cited) gene family, regulates gene transcription. Increased expression of the Cited4 gene in an adult mouse is associated with exercise-induced cardiomyocyte hypertrophy and proliferation. However, the expression patterns and functional roles of the Cited4 gene during cardiogenesis are largely unknown. Therefore, in the present study, we investigated the expression patterns and functional roles of the Cited4 gene during in vitro cardiogenesis...
2017: PloS One
https://www.readbyqxmd.com/read/28801055/therapy-with-mesenchymal-stromal-cells-or-conditioned-medium-reverse-cardiac-alterations-in-a-high-fat-diet-induced-obesity-model
#19
P S Daltro, B C Barreto, P G Silva, P Chenaud Neto, P H F Sousa Filho, D Santana Neta, G B Carvalho, D N Silva, B D Paredes, A C de Alcantara, L A R Freitas, R D Couto, R R Santos, B S F Souza, M B P Soares, S G Macambira
BACKGROUND: Obesity is associated with numerous cardiac complications, including arrhythmias, cardiac fibrosis, remodeling and heart failure. Here we evaluated the therapeutic potential of mesenchymal stromal cells (MSCs) and their conditioned medium (CM) to treat cardiac complications in a mouse model of high-fat diet (HFD)-induced obesity. METHODS: After obesity induction and HFD withdrawal, obese mice were treated with MSCs, CM or vehicle. Cardiac function was assessed using electrocardiography, echocardiography and treadmill test...
August 8, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28775185/frequency-of-exercise-induced-st-t-segment-deviations-and-cardiac-arrhythmias-in-recreational-endurance-athletes-during-a-marathon-race-results-of-the-prospective-observational-berlin-beat-of-running-study
#20
Juliane Herm, Agnieszka Töpper, Alexander Wutzler, Claudia Kunze, Matthias Krüll, Lars Brechtel, Jürgen Lock, Jochen B Fiebach, Peter U Heuschmann, Wilhelm Haverkamp, Matthias Endres, Gerhard Jan Jungehulsing, Karl Georg Haeusler
OBJECTIVES: While regular physical exercise has many health benefits, strenuous physical exercise may have a negative impact on cardiac function. The 'Berlin Beat of Running' study focused on feasibility and diagnostic value of continuous ECG monitoring in recreational endurance athletes during a marathon race. We hypothesised that cardiac arrhythmias and especially atrial fibrillation are frequently found in a cohort of recreational endurance athletes. The main secondary hypothesis was that pathological laboratory findings in these athletes are (in part) associated with cardiac arrhythmias...
August 3, 2017: BMJ Open
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