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Cardiac troponin I

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https://www.readbyqxmd.com/read/29051185/cgmp-elevating-compounds-and-ischemic-conditioning-provide-cardioprotection-against-ischemia-and-reperfusion-injury-via-cardiomyocyte-specific-bk-channels
#1
Sandra Frankenreiter, Piotr Bednarczyk, Angelina Kniess, Nadja Bork, Julia Straubinger, Piotr Koprowski, Antoni Wrzosek, Eva Mohr, Angela Logan, Michael P Murphy, Meinrad Gawaz, Thomas Krieg, Adam Szewczyk, Viacheslav O Nikolaev, Peter Ruth, Robert Lukowski
Background -The nitric oxide-sensitive guanylyl cyclase (NO-GC)/cyclic guanosine-3',5'-monophosphate (cGMP)/cGMP-dependent protein kinase type I (cGKI)-signaling pathway can afford protection against the ischemia and reperfusion (I/R) injury that occurs during myocardial infarction (MI). Reportedly, voltage and Ca(2+)-activated K(+) channels of the BK-type are stimulated by cGMP/cGKI and recent ex-vivo studies implicated that increased BK activity favors the survival of the myocardium at I/R. It remains unclear, however, whether the molecular events downstream of cGMP involve BK channels present in cardiomyocytes (CMs) or in other cardiac cell types...
October 19, 2017: Circulation
https://www.readbyqxmd.com/read/29047154/effects-of-testosterone-enanthate-and-resistance-training-on-myocardium-in-wistar-rats-clinical-and-anatomical-pathology
#2
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/29045610/high-sensitivity-cardiac-troponin-i-and-risk-of-heart-failure-in-patients-with-suspected-acute-coronary-syndrome-a-cohort-study
#3
Dominik Stelzle, Anoop S V Shah, Atul Anand, Fiona E Strachan, Andrew R Chapman, Martin A Denvir, Nicholas L Mills, David A McAllister
Aims: Heart failure may occur following acute myocardial infarction, but with the use of high-sensitivity cardiac troponin assays we increasingly diagnose patients with minor myocardial injury. Whether troponin concentrations remain a useful predictor of heart failure in patients with acute coronary syndrome is uncertain. Methods and results: We identified all consecutive patients (n = 4748) with suspected acute coronary syndrome (61 ± 16 years, 57% male) presenting to three secondary and tertiary care hospitals...
July 19, 2017: European Heart Journal. Quality of Care & Clinical Outcomes
https://www.readbyqxmd.com/read/29038153/prospective-validation-of-a-biomarker-based-rule-out-strategy-for-functionally-relevant-coronary-artery-disease
#4
Joan E Walter, Ursina Honegger, Christian Puelacher, Deborah Mueller, Max Wagener, Nicolas Schaerli, Ivo Strebel, Raphael Twerenbold, Jasper Boeddinghaus, Thomas Nestelberger, Lorraine Sazgary, Stella Marbot, Jeanne du Fay de Lavallaz, Christoph Kaiser, Stefan Osswald, Damian Wild, Katharina Rentsch, Michael Zellweger, Tobias Reichlin, Christian Mueller
BACKGROUND: This study aimed to prospectively advance a rule-out strategy for functionally significant coronary artery disease (CAD) by use of high-sensitivity cardiac troponin I (hs-cTnI) from bench to bedside, by application of a 3-step approach: validation in serum, correlation in plasma, and application on a clinical platform. METHODS: Patients without known CAD referred for rest/stress myocardial perfusion single-photon emission tomography/computer tomography (MPI-SPECT/CT) were assigned to 3 consecutive cohorts: validation, correlation, and application...
October 16, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29036985/-cardiac-troponin-i-interacting-kinase-a-new-intervention-target-for-ventricular-remodeling
#5
J Y Qiu, Z C Jing, X J Wang
No abstract text is available yet for this article.
September 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29036976/-comparison-of-perioperative-serum-thrombomodulin-levels-in-patients-underwent-off-pump-coronary-artery-bypass-grafting-with-and-without-cardiogenic-shock
#6
L Zhang, C Wang, T X Gu, C M Lu, Z W Wang
Objective: To observe the perioperative changes of serum thrombomodulin in patients with and without cardiogenic shock undergoing off-pump coronary artery bypass grafting surgery. Methods: A total of 66 patients with coronary artery disease who underwent off-pump coronary artery bypass grafting surgery between June and December 2015 in our hospital were included in this study.The patients were divided into non-cardiogenic shock group (n=51) and shock group (n=15) according to the absence or presence of cardiogenic shock...
September 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29035876/hydrogen-gas-attenuates-myocardial-ischemia-reperfusion-injury-independent-of-postconditioning-in-rats-by-attenuating-endoplasmic-reticulum-stress-induced-autophagy
#7
Yunan Gao, Hongxiao Yang, Jing Chi, Qiannan Xu, Luqi Zhao, Weijia Yang, Weifan Liu, Wei Yang
BACKGROUND/AIMS: To study the effect of inhaling hydrogen gas on myocardial ischemic/reperfusion(I/R) injury in rats. METHODS: Seventy male Wistar albino rats were divided into five groups at random as the sham group (Sham). The I/R group (I/R), The ischemic postconditioning group (IPo), The I/R plus hydrogen group (IH2) and the ischemic postconditioning plus hydrogen group (IPoH2). The Sham group was without coronary occlusion. In I/R group, Ischemic/reperfusion injury was induced by coronary occlusion for 1 hour...
October 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29035826/effects-of-gallic-acid-on-hemodynamic-parameters-and-infarct-size-after-ischemia-reperfusion-in-isolated-rat-hearts-with-alloxan-induced-diabetes
#8
Fatemeh Ramezani-Aliakbari, Mohammad Badavi, Mahin Dianat, Seyed Ali Mard, Akram Ahangarpour
Diabetic rats are more susceptible to myocardial ischemia-reperfusion injury than control rats. The aim of the present study was to evaluate the cardioprotective effect of gallic acid (GA) on isolated rat hearts with alloxan-induced diabetes mellitus. Adult male Sprague-Dawley rats were divided randomly into three groups: control, untreated diabetic and diabetic animals treated with (GA, 25mg/kg). Diabetes was induced by 120mg/kg alloxan injection. Eight weeks after GA administration, the hearts were isolated and exposed to myocardial ischemia-reperfusion...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29033166/early-peripheral-endothelial-dysfunction-predicts-myocardial-infarct-extension-and-microvascular-obstruction-in-patients-with-st-elevation-myocardial-infarction
#9
Sérgio Bravo Baptista, Mariana Faustino, Luís Brizida, José Loureiro, João Augusto, João Abecasis, Célia Monteiro, Paulo Leal, Maura Nédio, Pedro Farto E Abreu, Victor Gil, Carlos Morais
INTRODUCTION AND OBJECTIVES: The role of endothelial dysfunction (ED) in patients with ST-elevation myocardial infarction (STEMI) is poorly understood. Peripheral arterial tonometry (PAT) allows non-invasive evaluation of ED, but has never been used for this purpose early after primary percutaneous coronary intervention (P-PCI). Our purpose was to analyze the relation between ED assessed by PAT and both the presence of microvascular obstruction (MVO) and infarct extension in STEMI patients...
October 12, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29031332/right-ventricular-function-during-pharmacological-and-exercise-stress-testing-in-horses
#10
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/29030746/platelet-microrna-for-predicting-acute-myocardial-infarction
#11
Shuhua Li, Long Zhe Guo, Moo Hyun Kim, Jin-Yeong Han, Victor Serebruany
Acute myocardial infarction (AMI) is one of the leading causes of morbidity and mortality worldwide, while early diagnosis still represents an upmost priority. While platelet activation is critical for AMI pathogenesis, the role of platelet microRNAs (pmiRNAs) as biomarkers for AMI is unclear. Furthermore, correlations between the levels of pmiRNAs and indices of platelet activity are also unknown. Expression of platelet miR-1, miR-21, miR-126, miR-150 and miR-223 were prospectively assessed in 20 ST-segment elevation myocardial infarction (STEMI) patients, and 40 healthy volunteers...
October 13, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29030164/renal-function-as-a-cofactor-for-risk-stratification-and-short-term-outcome-in-acute-pulmonary-embolism
#12
Karsten Keller, Johannes Beule, Jörn Oliver Balzer, Wolfgang Dippold
BACKGROUND: In addition to right ventricular dysfunction (RVD) and myocardial injury, impaired renal function is connected with poorer prognosis in pulmonary embolism (PE). We aimed to investigate renal function as a cofactor for risk stratification in PE. METHODS: Data from 182 patients with PE, treated between May2006 and June2011, were analysed retrospectively. PE patients with elevated creatinine were compared with those with normal values. Logistic regression models were calculated to investigate associations between creatinine and myocardial necrosis, RVD and in-hospital death...
October 10, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29030107/ammodytin-l-is-the-main-cardiotoxic-component-of-the-vipera-ammodytes-ammodytes-venom
#13
Svjetlana Karabuva, Boris Lukšić, Ivica Brizić, Zorica Latinović, Adrijana Leonardi, Igor Križaj
Venom of the nose-horned viper (V. a. ammodytes) as also venoms of some related European viperids can induce also cardiotoxic effects in mammals. In this work we demonstrated that the protein in the V. a. ammodytes venom acting on heart is a myotoxic secreted phospholipase A2 analogue ammodytin L (AtnL). In the isolated perfused rat heart AtnL induced significant and irreversible cardiotoxicity characterized by atrioventricular (AV) blockade. This venom protein induced appearance of high levels of creatine kinase, lactate dehydrogenase, aspartate aminotransferase and troponin I in the sinus effluent of the isolated heart, indicative for myocardial damage, which is obviously the primary cause of its cardiotoxic action...
October 10, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29029109/early-diagnosis-of-acute-coronary-syndrome
#14
Hugo Katus, André Ziegler, Okan Ekinci, Evangelos Giannitsis, Wendy Gattis Stough, Stephan Achenbach, Stefan Blankenberg, Martina Brueckmann, Paul Collinson, Dorin Comaniciu, Filippo Crea, Wilfried Dinh, Grégory Ducrocq, Frank A Flachskampf, Keith A A Fox, Matthias G Friedrich, Kathy A Hebert, Anders Himmelmann, Mark Hlatky, Dominik Lautsch, Bertil Lindahl, Daniel Lindholm, Nicholas L Mills, Giorgio Minotti, Martin Möckel, Torbjørn Omland, Véronique Semjonow
The diagnostic evaluation of acute chest pain has been augmented in recent years by advances in the sensitivity and precision of cardiac troponin assays, new biomarkers, improvements in imaging modalities, and release of new clinical decision algorithms. This progress has enabled physicians to diagnose or rule-out acute myocardial infarction earlier after the initial patient presentation, usually in emergency department settings, which may facilitate prompt initiation of evidence-based treatments, investigation of alternative diagnoses for chest pain, or discharge, and permit better utilization of healthcare resources...
October 3, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29025373/the-prognostic-value-of-high-sensitive-cardiac-troponin-i-in-patients-receiving-cardiac-resynchronisation-therapy
#15
Michal Kerekanič, Marek Hudák, Silvia Mišíková, Erika Komanová, Alexander Bohó, Ján Kyselovič, Branislav Stančák
BACKGROUND: Cardiac troponin I (cTnI) is a valuable prognostic biomarker in patients with chronic heart failure (CHF). However, the prognostic importance of cTnI in patients who received cardiac resynchronisation therapy (CRT) remains unknown. The aim of this prospective study was to determine the prognostic value of high-sensitive cTnI (hs-cTnI) in CHF patients receiving CRT. METHODS: We performed measurements of baseline hs-cTnI levels in CRT patients with ischaemic as well as nonischaemic aetiology of CHF, and we investigated their possible association with response to CRT and survival of patients...
October 12, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/29023739/serum-cardiac-troponin-i-concentrations-in-dogs-with-generalised-seizures
#16
E Dutton, N Carmichael, U Michal, P J Cripps, A Boswood
OBJECTIVES: To determine if serum cardiac troponin I concentrations - measured with both a first-generation assay and a high-sensitivity assay - were greater in dogs with generalised seizures than in controls and to identify clinical variables associated with cardiac troponin I concentration. MATERIALS AND METHODS: Prospective study of 30 dogs with recent generalised seizures and 30 healthy controls. Serum cardiac troponin I concentration was measured using two commercially available assays, and the correlation of clinical factors with concentration was examined...
October 11, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29021328/improving-the-specificity-of-cardiac-biomarkers-the-early-development-of-cardiac-troponin-i-ctni-assays
#17
Allan S Jaffe
No abstract text is available yet for this article.
October 11, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29019905/bezold-jarisch-reflex-occurred-in-a-pediatric-patient-with-giant-intra-abdominal-teratoma-during-induction-of-anesthesia-a-case-report
#18
Kai-Ming Yuan, Shu-Ying Fu, Jun Li, Wang-Ning Shangguan, Qing-Quan Lian
RATIONALE: Bezold-Jarisch reflex (BJR) occurs when the cardioinhibitory receptors in the walls of ventricles are activated by various stimuli, with typical features of bradycardia, vasorelaxation, and hypotension. This reflex usually happens in parturient intrathecal anesthesia, as a result of decreased venous return by compression of inferior vena cava, but it is only rarely reported during general anesthesia. PATIENT CONCERNS: Severe bradycardia and hypotension, indicating BJR, occurred during the induction of general anesthesia in a 3-month-old female child with giant intra-abdominal teratoma...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29017768/analytical-comparison-of-three-different-versions-of-a-high-sensitivity-cardiac-troponin-i-assay-over-10years
#19
Peter A Kavsak, Andrew Worster, Stephen A Hill, Andrew R MacRae, Allan S Jaffe
BACKGROUND: Concerns have been raised on the long-term analytical performance of high-sensitivity cardiac troponin (hs-cTn) assays with respect to different reagent formulations, lots and instrumentation. Our goal for the present study was to compare three different versions of an hs-cTnI assay in two different study populations to evaluate if assay re-formulation over 10years has also affected the analytical results. METHODS: Beckman Coulter's CE marked hs-cTnI assay (Access hsTnI, 2017) was tested in 100 lithium heparin plasma samples first tested in 2007 with their prototype hs-cTnI assay and in 100 serum samples tested with their enhanced hs-cTnI assay in 2011 with comparison performed by Passing-Bablok regression...
October 7, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29017652/-hydrogen-can-alleviate-post-cardiac-arrest-myocardium-injury-in-rabbits
#20
Jingao Wang, Jiyan Lin, Minwei Zhang, Yujing He, Xiaowen Pan, Chengbin Yang, Dongmei Cai
OBJECTIVE: To investigate the effects of hydrogen (H2) on myocardium injury post-cardiac arrest (CA) in rabbits. METHODS: Sixty New Zealand rabbits were randomly divided into H2 treatment group (n = 30) and control group (n = 30) by random number table. The rabbit CA model was established by means of electrical stimulation of external membrane, both groups were mechanically ventilated. Cardiopulmonary resuscitation (CPR) was performed after 6 minutes of nonintervention, and stopped after restoration of spontaneous circulation (ROSC)...
October 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
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