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Daniels and (myocardial ischemia)

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https://www.readbyqxmd.com/read/29327562/development-of-a-porcine-beating-heart-model-of-self-myocardial-retroperfusion-evaluation-of-hemodynamic-and-cardiac-responses-to-ischemia-and-clinical-applications
#1
Daniel Grandmougin, Jean-Mathieu Casse, Antoine Chalon, Yun Luo, Aude Falanga, Vanessa Marie, Fréderique Groubatch-Joineau, Brice Mourer, Marie Grandmougin, David Grandmougin, Guillaume Gauchotte, Juan-Pablo Maureira, Nguyen Tran
BACKGROUND: Retrograde perfusion into the coronary sinus is used to deliver cardioplegia. We developed an in-vivo porcine beating-heart model of self-myocardial retroperfusion (SMR) using the venous route to supply myocardial oxygenation and sought to assess hemodynamic and cardiac responses triggered by SMR before and after a prolonged occlusion of the LAD. METHODS: A bypass-line between the ascending aorta and the coronary sinus was made to perform a selective retrograde perfusion of the great cardiac vein with oxygenated blood (SMR)...
January 9, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29275960/inactivation-of-the-glucose-dependent-insulinotropic-polypeptide-receptor-improves-outcomes-following-experimental-myocardial-infarction
#2
John R Ussher, Jonathan E Campbell, Erin E Mulvihill, Laurie L Baggio, Holly E Bates, Brent A McLean, Keshav Gopal, Megan Capozzi, Bernardo Yusta, Xiemin Cao, Safina Ali, Minsuk Kim, M Golam Kabir, Yutaka Seino, Jinya Suzuki, Daniel J Drucker
Incretin hormones exert pleiotropic metabolic actions beyond the pancreas. Although the heart expresses both incretin receptors, the cardiac biology of GIP receptor (GIPR) action remains incompletely understood. Here we show that GIPR agonism did not impair the response to cardiac ischemia. In contrast, genetic elimination of the Gipr reduced myocardial infarction (MI)-induced ventricular injury and enhanced survival associated with reduced hormone sensitive lipase (HSL) phosphorylation; it also increased myocardial triacylglycerol (TAG) stores...
December 20, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/29239349/influences-of-ivabradine-treatment-on-serum-levels-of-cardiac-biomarkers-sst2-gdf-15-supar-and-h-fabp-in-patients-with-chronic-heart-failure
#3
Peter Jirak, Dzeneta Fejzic, Vera Paar, Bernhard Wernly, Rudin Pistulli, Ilonka Rohm, Christian Jung, Uta C Hoppe, P Christian Schulze, Michael Lichtenauer, Atilla Yilmaz, Daniel Kretzschmar
Chronic heart failure (CHF) represents a major cause of hospitalization and death. Recent evidence shows that novel biomarkers such as soluble suppression of tumorigenicity (sST2), growth-differentiation factor-15 (GDF-15), soluble urokinase plasminogen activator receptor (suPAR) and heart-type fatty acid binding protein (H-FABP) are correlated with inflammatory and ischemic responses in CHF patients. In this study we examined the effects of Ivabradine that inhibited the hyperpolarization-activated cyclic nucleotide-gated channel (HCN channel, also called funny current If), thereby leading to selective heart rate reduction and improved myocardial oxygen supply on the cardiac biomarkers sST2, GDF-15, suPAR and H-FABP in 50 CHF patients at the University Hospital of Jena...
December 14, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29227899/cardiac-troponins-and-nt-probnp-in-the-forensic-setting-overview-of-sampling-site-postmortem-interval-cardiopulmonary-resuscitation-and-review-of-the-literature
#4
Cristian Palmiere, Camilla Tettamanti, Alessandro Bonsignore, Francesco De Stefano, Jessica Vanhaebost, Guillaume Rousseau, Maria Pia Scarpelli, Daniel Bardy
The possible use of biochemical markers in the postmortem diagnosis of myocardial ischemia is well known in the forensic setting, though several issues have limited its widespread adoption. The study presented herein focuses of N-terminal pro-B-type natriuretic peptide, troponin T, and troponin I, and the possible influence due to sampling site chosen, postmortem interval elapsed, and cardiopulmonary resuscitation attempts. Comparisons were performed between antemortem serum levels of these markers and postmortem levels measured in pericardial fluid and postmortem serum samples obtained from different sampling sites (n=16)...
January 2018: Forensic Science International
https://www.readbyqxmd.com/read/29209950/spect-myocardial-ischemia-in-the-absence-of-obstructive-cad-contribution-of-the-invasive-assessment-of-microvascular-dysfunction
#5
Loïc Djaïleb, Laurent Riou, Nicolas Piliero, Adrien Carabelli, Estelle Vautrin, Alexis Broisat, Julien Leenhardt, Jacques Machecourt, Daniel Fagret, Gerald Vanzetto, Gilles Barone-Rochette, Catherine Ghezzi
Coronary microvascular dysfunction has recently emerged as a major independent prognostic factor and can be invasively assessed by coronary flow reserve (CFR) and the index of microvascular resistance (IMR). The incremental prognostic value of myocardial ischemia from SPECT myocardial perfusion imaging (MPI) over clinical characteristics, cardiac risk factors, and stress test data for the prediction of hard cardiac events (myocardial infarction and cardiac death) has been well demonstrated over the last two decades regardless of the absence or presence of epicardial CAD...
December 5, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29197024/impact-of-incomplete-ventricular-coverage-on-diagnostic-performance-of-myocardial-perfusion-imaging
#6
Behzad Sharif, Manish Motwani, Reza Arsanjani, Rohan Dharmakumar, Mathews B Fish, Guido Germano, Debiao Li, Daniel S Berman, Piotr Slomka
In the context of myocardial perfusion imaging (MPI) with cardiac magnetic resonance (CMR), there is ongoing debate on the merits of using technically complex acquisition methods to achieve whole-heart spatial coverage, rather than conventional 3-slice acquisition. An adequately powered comparative study is difficult to achieve given the requirement for two separate stress CMR studies in each patient. The aim of this work is to draw relevant conclusions from SPECT MPI by comparing whole-heart versus simulated 3-slice coverage in a large existing dataset...
December 1, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29177706/prognostic-value-of-vasodilator-response-using-rubidium-82-positron-emission-tomography-myocardial-perfusion-imaging-in-patients-with-coronary-artery-disease
#7
Punitha Arasaratnam, Masoud Sadreddini, Yeung Yam, Vinay Kansal, Sharmila Dorbala, Marcelo F Di Carli, Rob S Beanlands, Michael E Merhige, Brent A Williams, Emir Veledar, James K Min, Li Chen, Terrence D Ruddy, Guido Germano, Daniel S Berman, Leslee J Shaw, Benjamin J W Chow
BACKGROUND: Prognostic value of positron emission tomography (PET) myocardial perfusion imaging (MPI) is well established. There is paucity of data on how the prognostic value of PET relates to the hemodynamic response to vasodilator stress. We hypothesize that inadequate hemodynamic response will affect the prognostic value of PET MPI. METHODS AND RESULTS: Using a multicenter rubidium (Rb)-82 PET registry, 3406 patients who underwent a clinically indicated rest/stress PET MPI with a vasodilator agent were analyzed...
November 27, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29158839/characterization-of-cardiac-dynamics-in-an-acute-myocardial-infarction-model-by-four-dimensional-optoacoustic-and-magnetic-resonance-imaging
#8
Hsiao-Chun Amy Lin, Xosé Luís Déan-Ben, Ivana Ivankovic, Melanie A Kimm, Katja Kosanke, Helena Haas, Reinhard Meier, Fabian Lohöfer, Moritz Wildgruber, Daniel Razansky
Extraction of murine cardiac functional parameters on a beat-by-beat basis is limited with the existing imaging modalities due to insufficient three-dimensional temporal resolution. Faster volumetric imaging methods enabling in vivo characterization of functional parameters are poised to advance cardiovascular research and provide a better understanding of the mechanisms underlying cardiac diseases. We present a new approach based on analyzing contrast-enhanced optoacoustic (OA) images acquired at high volumetric frame rate without using cardiac gating or other approaches for motion correction...
2017: Theranostics
https://www.readbyqxmd.com/read/29126895/extracorporeal-membrane-oxygenation-in-circulatory-and-respiratory-failure-a-single-center-experience
#9
Marisa Passos Silva, Daniel Caeiro, Paula Fernandes, Cláudio Guerreiro, Eduardo Vilela, Marta Ponte, Adelaide Dias, Fernando Alves, Jorge Morais, Andreza Mello, Lino Santos, Paula Castelões, Vasco Gama
INTRODUCTION: Extracorporeal membrane oxygenation (ECMO) provides mechanical pulmonary and circulatory support for patients with shock refractory to conventional medical therapy. In this study we aim to describe the indications, clinical characteristics, complications and mortality associated with use of ECMO in a single tertiary hospital. METHODS: We conducted a retrospective observational cohort study of all patients supported with ECMO in two different intensive care units (general and cardiac), from the first patient cannulated in April 2011 up to October 2016...
November 7, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29110288/myocardial-perfusion-imaging-lessons-learned-and-work-to-be-done-update
#10
Ami E Iskandrian, Vasken Dilsizian, Ernest V Garcia, Rob S Beanlands, Manuel Cerqueira, Prem Soman, Daniel S Berman, Alberto Cuocolo, Andrew J Einstein, Charity J Morgan, Fadi G Hage, Heinrich R Schelbert, Jeroen J Bax, Joseph C Wu, Leslee J Shaw, Mehran M Sadeghi, Nagara Tamaki, Philipp A Kaufmann, Robert Gropler, Sharmila Dorbala, William Van Decker
As the second term of our commitment to Journal begins, we, the editors, would like to reflect on a few topics that have relevance today. These include prognostication and paradigm shifts; Serial testing: How to handle data? Is the change in perfusion predictive of outcome and which one? Ischemia-guided therapy: fractional flow reserve vs perfusion vs myocardial blood flow; positron emission tomography (PET) imaging using Rubidium-82 vs N-13 ammonia vs F-18 Flurpiridaz; How to differentiate microvascular disease from 3-vessel disease by PET? The imaging scene outside the United States, what are the differences and similarities? Radiation exposure; Special issues with the new cameras? Is attenuation correction needed? Are there normal databases and are these specific to each camera system? And finally, hybrid imaging with single-photon emission tomography or PET combined with computed tomography angiography or coronary calcium score...
November 6, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29083088/clinical-applications-of-qt-rr-hysteresis-assessment-a%C3%A2-systematic-review
#11
REVIEW
Hugo Gravel, Vincent Jacquemet, Nagib Dahdah, Daniel Curnier
BACKGROUND: QT/RR hysteresis (QT-hys) is an index of the time accommodation of ventricular repolarization to heart rate changes. This report comprehensively reviews studies addressing QT-hys as a biomarker of medical conditions. METHODS: This is a secondary analysis of data from a recent systematic review pertaining to methods of assessment of QT-hys. Articles included in the former review were filtered in order to select original articles investigating the association of QT-hys with medical conditions in humans...
January 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29023410/long-term-osmotic-mini-pump-treatment-with-alpha-msh-improves-myocardial-function-in-zucker-diabetic-fatty-rats
#12
Miklos Szokol, Daniel Priksz, Mariann Bombicz, Balazs Varga, Arpad Kovacs, Gabor Aron Fulop, Tamas Csipo, Aniko Posa, Attila Toth, Zoltan Papp, Zoltan Szilvassy, Bela Juhasz
The present investigation evaluates the cardiovascular effects of the anorexigenic mediator alpha-melanocyte stimulating hormone (MSH), in a rat model of type 2 diabetes. Osmotic mini pumps delivering MSH or vehicle, for 6 weeks, were surgically implanted in Zucker Diabetic Fatty (ZDF) rats. Serum parameters, blood pressure, and weight gain were monitored along with oral glucose tolerance (OGTT). Echocardiography was conducted and, following sacrifice, the effects of treatment on ischemia/reperfusion cardiac injury were assessed using the isolated working heart method...
October 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28966593/sphingosine-1-phosphate-receptor-modulator-fingolimod-fty720-attenuates-myocardial-fibrosis-in-post-heterotopic-heart-transplantation
#13
Naseer Ahmed, Daniele Linardi, Nazeer Muhammad, Cristiano Chiamulera, Guido Fumagalli, Livio San Biagio, Mebratu A Gebrie, Muhammad Aslam, Giovanni Battista Luciani, Giuseppe Faggian, Alessio Rungatscher
Background and Objective: Sphingosine 1-phosphate (S1P), and S1P receptor modulator fingolimod have been suggested to play important cardioprotective role in animal models of myocardial ischemia/reperfusion injuries. To understand the cardioprotective function of S1P and its mechanism in vivo, we analyzed apoptotic, inflammatory biomarkers, and myocardial fibrosis in an in vivo heterotopic rat heart transplantation model. Methods: Heterotopic heart transplantation is performed in 60 Sprague-Dawley (SD) rats (350-400 g)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28936745/circulating-exosomes-in-cardiovascular-diseases
#14
Yihua Bei, Ting Chen, Daniel Dumitru Banciu, Dragos Cretoiu, Junjie Xiao
Circulating exosomes could arrive in distant tissues via blood circulation, thus directly communicating with target cells and rapidly regulating intracellular signalings. Circulating exosomes and exosomal cargos are critically involved in cardiovascular pathophysiology, such as cardiomyocyte hypertrophy, apoptosis, and angiogenesis. Circulating exosomes enriched with various types of biological molecules can be changed not only in the number but also in the composite cargos upon cardiac injury, such as myocardial infarction, myocardial ischemia reperfusion injury, atherosclerosis, hypertension, and sepsis cardiomyopathy, which may further influence cardiomyocyte function and contribute to the pathogenesis of cardiovascular diseases...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28920097/acute-cd47-blockade-during-ischemic-myocardial-reperfusion-enhances-phagocytosis-associated-cardiac-repair
#15
Shuang Zhang, Xin-Yi Yeap, Matthew DeBerge, Nivedita K Naresh, Kevin Wang, Zhengxin Jiang, Jane E Wilcox, Steven M White, John P Morrow, Paul W Burridge, Daniel Procissi, Evan A Scott, William Frazier, Edward B Thorp
Our data suggest that, after a myocardial infarction, integrin-associated protein CD47 on cardiac myocytes is elevated. In culture, increased CD47 on the surface of dying cardiomyocytes impairs phagocytic removal by immune cell macrophages. After myocardial ischemia and reperfusion, acute CD47 inhibition with blocking antibodies enhanced dead myocyte clearance by cardiac phagocytes and also improved the resolution of cardiac inflammation, reduced infarct size, and preserved cardiac contractile function. Early targeting of CD47 in the myocardium after reperfusion may be a new strategy to enhance wound repair in the ischemic heart...
August 2017: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/28854963/takayasu-s-arteritis-a-case-with-relapse-after-urgent-coronary-revascularization
#16
Klaus Empen, Astrid Hummel, Daniel Beug, Stephan B Felix, Mathias C Busch, Piotr M Kaczmarek
BACKGROUND: Vasculitides are commonly unrecognized causes of coronary stenosis and myocardial ischemia. We report on a 24-year old patient with Takayasu's arteritis who underwent urgent percutaneous coronary intervention, suffered from symptomatic restenosis of the left main coronary artery during standard immunosuppressive therapy. CASE PRESENTATION: A 24-year old woman was referred for coronary angiography because of typical progressive angina pectoris. On bicycle ergometry, there were both reproducible symptoms and deep ST segment depressions on precordial leads...
July 25, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28851810/mertk-cleavage-on-resident-cardiac-macrophages-compromises-repair-after-myocardial-ischemia-reperfusion-injury
#17
Matthew DeBerge, Xin Yi Yeap, Shirley Dehn, Shuang Zhang, Lubov Grigoryeva, Sol Misener, Daniel Procissi, Xin Zhou, Daniel C Lee, William A Muller, Xunrong Luo, Carla Rothlin, Ira Tabas, Edward B Thorp
RATIONALE: Clinical benefits of reperfusion after myocardial infarction are offset by maladaptive innate immune cell function, and therapeutic interventions are lacking. OBJECTIVE: We sought to test the significance of phagocytic clearance by resident and recruited phagocytes after myocardial ischemia reperfusion. METHODS AND RESULTS: In humans, we discovered that clinical reperfusion after myocardial infarction led to significant elevation of the soluble form of MerTK (myeloid-epithelial-reproductive tyrosine kinase; ie, soluble MER), a critical biomarker of compromised phagocytosis by innate macrophages...
September 29, 2017: Circulation Research
https://www.readbyqxmd.com/read/28846540/determinants-of-long-term-outcome-in-patients-after-percutaneous-stent-assisted-management-of-symptomatic-subclavian-or-innominate-artery-stenosis-or-occlusion
#18
Tadeusz Przewlocki, Leszek Wrotniak, Anna Kablak-Ziembicka, Piotr Pieniazek, Agnieszka Roslawiecka, Daniel Rzeznik, Marcin Misztal, Wojciech Zajdel, Rafał Badacz, Andrzej Sokolowski, Mariusz Trystula, Piotr Musialek, Krzysztof Zmudka
AIMS: Incidence and determinants of restenosis and adverse events after endovascular management (PTA±stent) of the subclavian/innominate artery (SA/IA) stenosis/occlusion remain unclear due to relatively short-term follow-up or limited size of prior studies. This large-scale, long-term prospective study investigated safety, efficacy, and prognosis after SA/IA PTA±stent. METHODS AND RESULTS: The study involved 411 consecutive patients with symptomatic SA/IA stenosis/occlusion; 393 after successful PTA±stent were followed annually for up to 16 (minimum 1) years...
August 29, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28756071/-how-to-detect-myocardial-ischemia-in-patients-following-acute-coronary-syndrome-treated-by-pci
#19
Nicolas Amabile, Marie Christine Malergue, Guy Achkouty, Daniel Czitrom, Christophe Caussin
Unstable coronary artery disease is a more aggressive condition than stable coronary artery disease, accounting for the high incidence of major adverse cardiovascular events following acute coronary syndromes (ACS), which includes the need for iterative repeat revascularization. The aim of myocardial ischemia screening in post-ACS patients is to detect this unfavourable evolution (either on initial culprit or non culprit lesions) and to prevent any clinical complication. Although there is no strict recommendation in this particular situation, screening should be based on the use of stress imaging techniques...
July 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28752313/the-elusive-role-of-myocardial-perfusion-imaging-in-stable-ischemic-heart-disease-is-ischemia-the-answer
#20
Joe X Xie, David E Winchester, Lawrence M Phillips, Rory Hachamovitch, Daniel S Berman, Ron Blankstein, Marcelo F Di Carli, Todd D Miller, Mouaz H Al-Mallah, Leslee J Shaw
The assessment of ischemia through myocardial perfusion imaging (MPI) is widely accepted as an index step in the diagnostic evaluation of stable ischemic heart disease (SIHD). Numerous observational studies have characterized the prognostic significance of ischemia extent and severity. However, the role of ischemia in directing downstream SIHD care including coronary revascularization has remained elusive as reductions in ischemic burden have not translated to improved clinical outcomes in randomized trials...
October 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
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