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Myocardial ischaemia

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https://www.readbyqxmd.com/read/29452370/blood-cardioplegia-for-cardiac-surgery-in-acute-myocardial-infarction-rat-experiments-with-two-widely-used-solutions
#1
Andreas Boening, Lena Assling-Simon, Martina Heep, Kerstin Boengler, Bernd Niemann, Julia Schipke, Christian Mühlfeld, Philippe Grieshaber
OBJECTIVES: Blood cardioplegia (BCP) can be used in different ways to protect the heart from ischaemia-reperfusion injury during cardiac surgery. Because there could be differences between warm and cold intermittent cardioplegia with or without warm reperfusion, we investigated the influence of 2 blood cardioplegia solutions on cardiac function, metabolism and infarct size in stable and infarcted rat hearts. METHODS: The hearts of 32 male Wistar rats were excised and inserted into a blood-perfused isolated heart apparatus...
February 14, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29447379/acute-exercise-is-not-cardioprotective-and-may-induce-apoptotic-signalling-in-heart-surgery-a-randomized-controlled-trial
#2
Benedikte T Smenes, Fredrik H Bækkerud, Katrine H Slagsvold, Erlend Hassel, Martin Wohlwend, Maria Pinho, Morten Høydal, Ulrik Wisløff, Øivind Rognmo, Alexander Wahba
OBJECTIVES: During open-heart surgery, the myocardium experiences ischaemia-reperfusion injury. A single bout of moderate, 30-min exercise induces preconditioning and protects the heart from ischaemia-reperfusion injury in rats, but this has never been investigated in humans. We aimed to investigate whether 1 bout of moderate exercise 24 h prior to surgery protects against mitochondrial and cardiac damage. METHODS: Patients scheduled for elective coronary artery bypass were eligible for this pilot study...
February 13, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29444216/long-term-outcomes-of-single-ventricle-palliation-for-pulmonary-atresia-with-intact-ventricular-septum-fontan-survivors-remain-at-risk-of-late-myocardial-ischaemia-and-death
#3
Patrick Elias, Chin Leng Poh, Karin du Plessis, Diana Zannino, Kathryn Rice, Dorothy J Radford, Andrew Bullock, Gavin R Wheaton, David S Celermajer, Yves d'Udekem
OBJECTIVES: The specific outcomes of patients with pulmonary atresia with intact ventricular septum late after Fontan palliation are unknown. Patients with smaller right ventricles and myocardial sinusoids are known to have worse survival in the first years of life. Whether the potential for coronary ischaemia affects the long-term outcomes of these patients after Fontan palliation is still unknown. METHODS: All patients with pulmonary atresia with intact ventricular septum who underwent the Fontan procedure from 1984 to 2016 in Australia and New Zealand were identified, and preoperative, perioperative and follow-up data were collected...
February 12, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29442529/signaling-mediators-modulated-by-cardioprotective-interventions-in-healthy-and-diabetic-myocardium-with-ischaemia-reperfusion-injury
#4
Feyzizadeh Saeid, Javadi Aniseh, Badalzadeh Reza, Vafaee S Manouchehr
Ischaemic heart diseases are one of the major causes of death in the world. In most patients, ischaemic heart disease is coincident with other risk factors such as diabetes. Patients with diabetes are more prone to cardiac ischaemic dysfunctions including ischaemia-reperfusion injury. Ischaemic preconditioning, postconditioning and remote conditionings are reliable interventions to protect the myocardium against ischaemia-reperfusion injuries through activating various signaling pathways and intracellular mediators...
January 1, 2018: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29436250/effects-of-preconditioned-plasma-collected-during-the-late-phase-of-remote-ischaemic-preconditioning-on-ventricular-arrhythmias-caused-by-myocardial-ischaemia-reperfusion-in-rats
#5
Yang Zhao, Zhi-Nan Zheng, Xiang Liu, Gang Dai, San-Qing Jin
Objective The administration of preconditioned plasma collected during the late phase of preconditioning has been shown to reduce myocardial infarct size. This study aimed to investigate if preconditioned plasma could attenuate ventricular arrhythmias in a rat model in vivo. Methods Eighty rats were randomized to eight groups (10 rats/group). Two groups provided preconditioned or non-preconditioned plasma 48 h after transient limb ischaemia or the control protocol. Six groups of ischaemia-reperfusion (IR) rats received normal saline, non-preconditioned plasma, or preconditioned plasma, respectively, 1 h (groups A1, A2, A3) or 24 h (groups B1, B2, B3) before undergoing myocardial IR...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29406178/high-sensitivity-cardiac-troponin-t-in-young-healthy-adults-undergoing-non-cardiac-surgery
#6
A Duma, C Wagner, M Titz, M Maleczek, M Hüpfl, V B Weihs, E Samaha, H Herkner, T Szekeres, M Mittlboeck, M G Scott, A S Jaffe, P Nagele
BACKGROUND: It is unclear if isolated postoperative cardiac-troponin elevation, often referred to as myocardial injury, represents a pathological event, as control studies in otherwise healthy adults are lacking. METHODS: In this single-centre prospective observational cohort study, serial high-sensitivity cardiac troponin T (hscTnT) plasma concentrations were obtained from young, healthy adults undergoing elective orthopaedic surgery at three time points: before operation, 2-6 h, and 18-30 h after surgery...
February 2018: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29398472/long-noncoding-rna-ak12348-is-involved-in-the-regulation-of-myocardial-ischaemia-reperfusion-injury-by-targeting-parp-and-caspase-3
#7
Chengfei Zheng, Ziheng Wu, Lu Tian, Donglin Li, Xiaohui Wang, Yunjun He, Yangyan He, Wei Jin, Ming Li, Qianqian Zhu, Tao Shang, Hongkun Zhang
BACKGROUD: Recently long non-coding RNAs (lncRNAs) have attracted attention in several biomedical fields. The purpose of this study is to investigate the profile of myocardial lncRNAs and their potential roles in myocardial ischaemia-reperfusion injury (IRI). METHODS: EdgeR bioconductor package was used to screen differentially expressed lncRNAs in myocardial IRI, and lncRNA AK12348 was selected. The mRNA levels of lncRNA AK12348 in normal and anoxia/reoxygenation (A/R) cardiomyocytes were determined by qRT-PCR...
May 26, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29392098/patient-specific-coronary-blood-supply-territories-for-quantitative-perfusion-analysis
#8
Constantine Zakkaroff, John D Biglands, John P Greenwood, Sven Plein, Roger D Boyle, Aleksandra Radjenovic, Derek R Magee
Myocardial perfusion imaging, coupled with quantitative perfusion analysis, provides an important diagnostic tool for the identification of ischaemic heart disease caused by coronary stenoses. The accurate mapping between coronary anatomy and under-perfused areas of the myocardium is important for diagnosis and treatment. However, in the absence of the actual coronary anatomy during the reporting of perfusion images, areas of ischaemia are allocated to a coronary territory based on a population-derived 17-segment (American Heart Association) AHA model of coronary blood supply...
2018: Computer Methods in Biomechanics and Biomedical Engineering. Imaging & Visualization
https://www.readbyqxmd.com/read/29377505/maternal-diabetes-up-regulates-nox2-and-enhances-myocardial-ischaemia-reperfusion-injury-in-adult-offspring
#9
Lili Zhang, Xiaoyan Wang, Yan Wu, Xiangru Lu, Peter Chidiac, Guoping Wang, Qingping Feng
Offspring of diabetic mothers are at risk of cardiovascular diseases in adulthood. However, the underlying molecular mechanisms are not clear. We hypothesize that prenatal exposure to maternal diabetes up-regulates myocardial NOX2 expression and enhances ischaemia/reperfusion (I/R) injury in the adult offspring. Maternal diabetes was induced in C57BL/6 mice by streptozotocin. Glucose-tolerant adult offspring of diabetic mothers and normal controls were subjected to myocardial I/R injury. Vascular endothelial growth factor (VEGF) expression, ROS generation, myocardial apoptosis and infarct size were assessed...
January 29, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29369521/brief-challenges-on-medicinal-plants-an-eye-opening-look-at-ageing-related-disorders
#10
Geir Bjørklund, Maryam Dadar, Natália Martins, Salvatore Chirumbolo, Bey Hing Goh, Kateryna Smetanina, Roman Lysiuk
Several studies have reported that nature-derived antioxidants may prevent free radicals over-production and therefore control the onset and prevent the exacerbation of different kinds of diseases caused by oxidative stress and redox-derived stressors, including ageing, fundamentally by suppressing the oxidative byproducts-mediated degradation. Naturally derived antioxidants exert their anti-ageing action via a panoply of signalling systems, many of which engaging reactive oxygen (ROS) and nitrogen (RNS) species scavenging, with the Nrf2/Keap1-ARE system and improving the many survival genes and functions (such as the pathway mTOR/Foxo/SIRT1) able to slow cellular senescence...
January 25, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29354280/medical-judgement-analogue-studies-with-applications-to-spaceflight-crew-medical-officer
#11
Michele L McCarroll, Rami A Ahmed, Alan Schwartz, Michael David Gothard, Steven Scott Atkinson, Patrick Hughes, Jose Cepeda Brito, Lori Assad, Jerry Myers, Richard L George
Background: The National Aeronautics and Space Administration (NASA) developed plans for potential emergency conditions from the Exploration Medical Conditions List. In an effort to mitigate conditions on the Exploration Medical Conditions List, NASA implemented a crew medical officer (CMO) designation for eligible astronauts. This pilot study aims to add knowledge that could be used in the Integrated Medical Model. Methods: An analogue population was recruited for two categories: administrative physicians (AP) representing the physician CMOs and technical professionals (TP) representing the non-physician CMOs...
October 2017: BMJ Simul Technol Enhanc Learn
https://www.readbyqxmd.com/read/29350536/diagnostic-accuracy-of-functional-imaging-and-biochemical-tests-for-patients-presenting-with-chest-pain-to-the-emergency-department-a-systematic-review-and-meta-analysis
#12
Mario Iannaccone, Sebastiano Gili, Ovidio De Filippo, Salvatore D'Amico, Marco Gagliardi, Maurizio Bertaina, Silvia Mazzilli, Sara Rettegno, Federica Bongiovanni, Paolo Gatti, Fabrizio Ugo, Giacomo G Boccuzzi, Salvatore Colangelo, Silvia Prato, Claudio Moretti, Maurizio D'Amico, Patrizia Noussan, Roberto Garbo, David Hildick-Smith, Fiorenzo Gaita, Fabrizio D'Ascenzo
BACKGROUND: Non-invasive ischaemia tests and biomarkers are widely adopted to rule out acute coronary syndrome in the emergency department. Their diagnostic accuracy has yet to be precisely defined. METHODS: Medline, Cochrane Library CENTRAL, EMBASE and Biomed Central were systematically screened (start date 1 September 2016, end date 1 December 2016). Prospective studies (observational or randomised controlled trial) comparing functional/imaging or biochemical tests for patients presenting with chest pain to the emergency department were included...
January 1, 2018: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29344374/cardioprotection-by-an-anti-masp-2-antibody-in-a-murine-model-of-myocardial-infarction
#13
James E Clark, Thomas Dudler, Michael S Marber, Wilhelm Schwaeble
Background: Myocardial ischaemia-reperfusion injury is a major cause of mortality and morbidity in the developed world. Many approaches have been investigated to counteract the pathological consequences associated with acute myocardial infarction (AMI) and cardiac remodelling. It is accepted that inflammation, and therefore activation of the complement pathway, is a crucial step in the pathogenesis of this injury, and many attempts have been made to ameliorate the infarction and consequent dysfunction using anticomplement therapy, with mixed success...
2018: Open Heart
https://www.readbyqxmd.com/read/29336387/dexmedetomidine-for-prevention-of-skeletal-muscle-ischaemia-reperfusion-injury-in-patients-with-chronic-limb-ischaemia-undergoing-aortobifemoral-bypass-surgery-a-prospective-double-blind-randomized-controlled-study
#14
Tanveer Singh Kundra, Ashwini Thimmarayappa, Manasa Dhananjaya, N Manjunatha
BACKGROUND: Dexmedetomidine is a selective α-2 agonist used for sedation. It has also been shown to have myocardial protective effect and prevent ischemia-reperfusion injury in off-pump coronary artery bypass patients. The aim of our study was to assess the effect of dexmedetomidine for prevention of skeletal muscle ischemia-reperfusion injury in patients undergoing aortobifemoral bypass surgery. METHODOLOGY: Sixty adult patients (Group dexmedetomidine n = 30, Group normal saline n = 30) undergoing aortobifemoral bypass surgery were recruited over 3 months...
January 2018: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/29325222/pneumonia-as-a-cardiovascular-disease
#15
REVIEW
Marcos I Restrepo, Luis F Reyes
Community-acquired pneumonia (CAP) is an important cause of death around the globe. Up to 30% of patients admitted to hospital for CAP develop cardiovascular complications (i.e. new/worsening heart failure, new/worsening arrhythmias, myocardial infarctions and/or strokes), acutely and up to 10 years thereafter. Cardiac complications result from complex interactions between preexisting conditions, relative ischaemia, upregulation of the sympathetic system, systemic inflammation and direct pathogen-mediated damage to the cardiovascular system...
January 11, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29316984/coronary-artery-spasm-due-to-intravenous-atropine-infusion-in-a-child-possible-kounis-syndrome
#16
Ana Castellano-Martinez, Moises Rodriguez-Gonzalez
Coronary vasospasm can result from silent myocardial ischaemia to sudden death. There are many precipitant factors including different pharmacological agents. Kounis syndrome is defined by acute coronary syndromes associated with anaphylactic or anaphylactoid reactions. We report, to the best of our knowledge, the first paediatric case of Kounis syndrome due to intravenous atropine.
January 10, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29315366/long-term-prognostic-value-of-single-photon-emission-computed-tomography-myocardial-perfusion-imaging-after-primary-pci-for-stemi
#17
Jeff M Smit, Maaike P Hermans, Aukelien C Dimitriu-Leen, Alexander R van Rosendael, Petra Dibbets-Schneider, Lioe-Fee de Geus-Oei, Bart J Mertens, Martin J Schalij, Jeroen J Bax, Arthur J Scholte
Aims: The aim of this study was to determine the long-term prognostic value of infarct size and myocardial ischaemia on single-photon emission computed tomography myocardial perfusion imaging (SPECT MPI) after primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI). Methods and results: In total, 1092 STEMI patients who underwent primary PCI and SPECT MPI within 1-6 months were included (median follow-up time of 6...
January 5, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29314656/mammalian-target-of-rapamycin-inhibition-attenuates-myocardial-ischaemia-reperfusion-injury-in-hypertrophic-heart
#18
Lei-Lei Ma, Xin Ma, Fei-Juan Kong, Jun-Jie Guo, Hong-Tao Shi, Jian-Bing Zhu, Yun-Zeng Zou, Jun-Bo Ge
Pathological cardiac hypertrophy aggravated myocardial infarction and is causally related to autophagy dysfunction and increased oxidative stress. Rapamycin is an inhibitor of serine/threonine kinase mammalian target of rapamycin (mTOR) involved in the regulation of autophagy as well as oxidative/nitrative stress. Here, we demonstrated that rapamycin ameliorates myocardial ischaemia reperfusion injury by rescuing the defective cytoprotective mechanisms in hypertrophic heart. Our results showed that chronic rapamycin treatment markedly reduced the phosphorylated mTOR and ribosomal protein S6 expression, but not Akt in both normal and aortic-banded mice...
January 4, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29309882/patient-health-service-factors-and-variation-in-mortality-following-resuscitated-out-of-hospital-cardiac-arrest-in-acute-coronary-syndrome-analysis-of-the-myocardial-ischaemia-national-audit-project
#19
Keith Couper, Peter K Kimani, Chris P Gale, Tom Quinn, Iain B Squire, Andrea Marshall, John J M Black, Matthew W Cooke, Bob Ewings, John Long, Gavin D Perkins
AIMS: To determine patient and health service factors associated with variation in hospital mortality among resuscitated cases of out-of-hospital cardiac arrest (OHCA) with acute coronary syndrome (ACS). METHODS: In this cohort study, we used the Myocardial Ischaemia National Audit Project database to study outcomes in patients hospitalised with resuscitated OHCA due to ACS between 2003 and 2015 in the United Kingdom. We analysed variation in inter-hospital mortality and used hierarchical multivariable regression models to examine the association between patient and health service factors with hospital mortality...
January 5, 2018: Resuscitation
https://www.readbyqxmd.com/read/29285123/an-in-vitro-endothelial-cell-protective-effect-of-secretory-leukocyte-protease-inhibitor-against-simulated-ischaemia-reperfusion-injury
#20
Nitirut Nernpermpisooth, Eakkapote Prompunt, Sarawut Kumphune
Endothelial dysfunction is an essential deleterious modulator of ischaemia/reperfusion (I/R) injury. Secretory leukocyte protease inhibitor (SLPI) has demonstrated myocardial protection in cardiac transplantation; however, the effect of SLPI in endothelial I/R injury remains unexplored. In the present study, the effect of recombinant human SLPI (rhSLPI) treatment against endothelial cells (ECs) subjected to simulated I/R injury and the effect of treatment at different time points were determined. Human umbilical vein ECs (HUVECs) were subjected to normoxic or simulated I/R (sI/R) conditions, and rhSLPI at concentrations of 1, 10, 100 and 1,000 ng/ml was added to the cells prior to ischaemia, during ischaemia or at the onset of reperfusion...
December 2017: Experimental and Therapeutic Medicine
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