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Myocardial function

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https://www.readbyqxmd.com/read/28545116/n-terminal-pro-b-type-natriuretic-peptide-in-amniotic-fluid-of-fetuses-with-known-or-suspected-cardiac-load
#1
Christina Leufgen, Ulrich Gembruch, Birgit Stoffel-Wagner, Rolf Fimmers, Waltraut M Merz
BACKGROUND: Myocardial dysfunction occurs in a variety of fetal disorders. Findings from adult cardiology, where n-terminal pro-B-type natriuretic peptide (nt-proBNP) is an established biomarker of left ventricular dysfunction have been extended to fetal life. Since fetal blood sampling is technically challenging we investigated amniotic fluid nt-proBNP for its suitability to diagnose fetal myocardial dysfunction. METHODS: Ultrasound, Doppler examination and echocardiography was applied to classify cases and controls...
2017: PloS One
https://www.readbyqxmd.com/read/28544839/isolated-right-ventricular-apical-trabecular-hypoplasia-a-case-report
#2
Qi Tan, Jie Zi, Mei Zhu, Anbiao Wang
Right ventricular (RV) hypoplasia with isolated myocardial disease and complete absence of RV trabeculae is a rare congenital heart disease, the current treatment of which is ineffective. Here, a rare case is presented of a middle-aged female patient with RV hypoplasia complicated by tricuspid regurgitation, right atrial thrombus, and atrial fibrillation. The patient was treated with a one-and-a-half ventricular repair, and showed significant improvements in cardiac function and physical activity tolerance...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544830/assessment-of-contributors-of-aortopathy-and-subclinical-left-ventricular-dysfunction-in-normally-functioning-bicuspid-aortic-valves
#3
Kamil Tuluce, Selcen Yakar Tuluce, Ersin Cagri Simsek, Serdar Bayata, Cem Nazli
BACKGROUND: Left ventricular (LV) function and the dimensions of aortic valves from normally functioning bicuspid aortic valve (BAV) patients were compared with those of healthy control patients. A comparison between patients with antero-posterior BAV (BAV-AP) or right-left BAV (BAV-RL) was also performed, and the determinants of aortopathy and LV function were investigated. METHODS: Sixty-eight patients with aortic velocities <2 m/s and trivial or mild aortic regurgitation were included in the study...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544332/fibroblast-growth-factor-2-protects-against-renal-ischaemia-reperfusion-injury-by-attenuating-mitochondrial-damage-and-proinflammatory-signalling
#4
Xiao-Hua Tan, Xiao-Meng Zheng, Li-Xia Yu, Jian He, Hong-Mei Zhu, Xiu-Ping Ge, Xiao-Li Ren, Fa-Qing Ye, Saverio Bellusci, Jian Xiao, Xiao-Kun Li, Jin-San Zhang
Ischaemia-reperfusion injury (I/RI) is a common cause of acute kidney injury (AKI). The molecular basis underlying I/RI-induced renal pathogenesis and measures to prevent or reverse this pathologic process remains to be resolved. Basic fibroblast growth factor (FGF2) is reported to have protective roles of myocardial infarction as well as in several other I/R related disorders. Herein we present evidence that FGF2 exhibits robust protective effect against renal histological and functional damages in a rat I/RI model...
May 24, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28544100/undetectable-concentrations-of-an-fda-approved-high-sensitivity-cardiac-troponin-t-assay-to-rule-out-acute-myocardial-infarction-at-emergency-department-arrival
#5
Andrew D McRae, Grant Innes, Michelle Graham, Eddy Lang, James E Andruchow, Yunqi Ji, Shabnam Vatanpour, Tasnima Abedin, Hong Yang, Danielle A Southern, Dongmei Wang, Isolde Seiden-Long, Lawrence DeKoning, Peter Kavsak
BACKGROUND: The objective of this study was to quantify the sensitivity of very low concentrations of high-sensitivity cardiac troponin T (hsTnT) at ED arrival for acute myocardial infarction (AMI) in a large cohort of chest pain patients evaluated in real-world clinical practice. METHODS: This retrospective study included consecutive ED patients with suspected cardiac chest pain evaluated in four urban EDs were, excluding those with ST-elevation AMI, cardiac arrest or abnormal kidney function...
May 19, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28542952/compensatory-and-decompensatory-alterations-in-cardiomyocyte-ca-2-dynamics-in-hearts-with-diastolic-dysfunction-following-aortic-banding
#6
Sara Gattoni, Åsmund Treu Røe, Jan Magnus Aronsen, Ivar Sjaastad, William E Louch, Nicolas P Smith, Steven A Niederer
KEY POINTS: At the cellular level cardiac hypertrophy causes remodelling, leading to changes in ionic channel, pump and exchanger densities and kinetics. Previous studies have focused on quantifying changes in channels, pumps and exchangers without quantitatively linking these changes with emergent cellular scale functionality. Two biophysical cardiac cell models were created, parameterized and validated and are able to simulate electrophysiology and calcium dynamics in myocytes from control sham operated rats and aortic-banded rats exhibiting diastolic dysfunction...
May 21, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28542617/inflammatory-and-apoptotic-remodeling-in-autonomic-nervous-system-following-myocardial-infarction
#7
Chen Gao, Kimberly Howard-Quijano, Christoph Rau, Tatsuo Takamiya, Yang Song, Kalyanam Shivkumar, Yibin Wang, Aman Mahajan
BACKGROUND: Chronic myocardial infarction (MI) triggers pathological remodeling in the heart and cardiac nervous system. Abnormal function of the autonomic nervous system (ANS), including stellate ganglia (SG) and dorsal root ganglia (DRG) contribute to increased sympathoexcitation, cardiac dysfunction and arrythmogenesis. ANS modulation is a therapeutic target for arrhythmia associated with cardiac injury. However, the molecular mechanism involved in the pathological remodeling in ANS following cardiac injury remains to be established...
2017: PloS One
https://www.readbyqxmd.com/read/28542428/age-dependent-electrical-and-morphological-remodeling-of-the-drosophila-heart-caused-by-herg-seizure-mutations
#8
Karen Ocorr, Alexander Zambon, Yoav Nudell, Santiago Pineda, Soda Diop, Min Tang, Takeshi Akasaka, Erika Taylor
Understanding the cellular-molecular substrates of heart disease is key to the development of cardiac specific therapies and to the prevention of off-target effects by non-cardiac targeted drugs. One of the primary targets for therapeutic intervention has been the human ether a go-go (hERG) K+ channel that, together with the KCNQ channel, controls the rate and efficiency of repolarization in human myocardial cells. Neither of these channels plays a major role in adult mouse heart function; however, we show here that the hERG homolog seizure (sei), along with KCNQ, both contribute significantly to adult heart function as they do in humans...
May 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28542130/activation-of-transient-receptor-potential-vanilloid-4-involves-in-hypoxia-reoxygenation-injury-in-cardiomyocytes
#9
Qiong-Feng Wu, Cheng Qian, Ning Zhao, Qian Dong, Jing Li, Bin-Bin Wang, Lei Chen, Lixiu Yu, Bing Han, Yi-Mei Du, Yu-Hua Liao
Transient receptor potential vanilloid 4 (TRPV4) is highly expressed in heart and vessels and can be activated during myocardial ischemia/reperfusion (I/R). Recently, we found that treatment with a selective TRPV4 antagonist HC-067047 significantly reduced infarct size, decreased troponin T levels and improved cardiac function in murine model myocardial I/R. This study was undertaken to investigate the mechanism underlying TRPV4-mediated myocardial I/R injury. To mimic myocardial I/R injury, we established a hypoxia/reoxygenation (H/R) model in H9C2 cells and neonatal rat ventricle myocytes (NRVMs) in vitro...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28541593/clinical-and-prognostic-relevancy-of-left-ventricular-trabeculation-assessed-by-cardiac-magnetic-resonance-in-patients-with-dilated-cardiomyopathy
#10
Łukasz Mazurkiewicz, Joanna Petryka, Mateusz Śpiewak, Barbara Miłosz-Wieczorek, Łukasz A Małek, Anna Jasińska, Ewelina Jarmus, Magdalena Marczak, Jolanta Misko, Jacek Grzybowski
BACKGROUND AND AIM: We sought to search for factors that are associated with the magnitude of trabeculation by cardiac magnetic resonance (CMR), and evaluate the impact of trabeculations on outcomes in patients with dilated cardiomyopathy (DCM). METHODS: We evaluated clinical profiles and outcomes of 276 subjects with DCM (age - 33,2+/-13,3 years, 160 males). Trabeculation was quantified as trabeculated/total myocardial mass ratio (TM/M). Subjects were stratified into 3 subgroups (A, B, and C) according to the tertiles of rising TM/M values (33% ranges)...
May 25, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28540919/myocardial-performance-index-for-patients-with-overt-and-subclinical-hypothyroidism
#11
Aziz Karabulut, Abdullah Doğan, Alpaslan Kemal Tuzcu
BACKGROUND Hypothyroid has several effects on the cardiovascular system. Global myocardial performance index (MPI) is used in assessment of both left ventricular (LV) systolic and diastolic function. We compared MPI in hypothyroidism patients vs. normal control subjects. MATERIAL AND METHODS Eighty-two hypothyroid patients were divided into 2 groups: a subclinical hypothyroid (SH) group (n=50), and an overt hypothyroid (OH) group (n=32). The healthy control group (CG) constituted of 37 patients. TSH, FT3, and FT4, anti-TPO, anti-TG, insulin, lipid values, and fasting glucose levels were studied...
May 25, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28540736/effects-of-diesel-exhaust-on-cardiovascular-function-and-oxidative-stress
#12
Simon Wilson, Mark R Miller, David E Newby
SIGNIFICANCE: Air pollution is a major global health concern with the particulate matter (PM) being especially associated with marked increases in cardiovascular morbidity and mortality. Diesel exhaust emissions are a particularly rich source of the smallest sizes of PM ("fine" and "ultrafine") in urban environments, and it is these particles that are believed to be the most detrimental to cardiovascular health. Recent Advances: Controlled exposure studies to diesel exhaust in animals and man demonstrate alterations in blood pressure, heart rate, vascular tone, endothelial function, myocardial perfusion, thrombosis, atherogenesis and plaque stability...
May 25, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28540569/altered-purinergic-signaling-in-uridine-adenosine-tetraphosphate-induced-coronary-relaxation-in-swine-with-metabolic-derangement
#13
Zhichao Zhou, Oana Sorop, Vincent J de Beer, Ilkka Heinonen, Caroline Cheng, A H Jan Danser, Dirk J Duncker, Daphne Merkus
We previously demonstrated that uridine adenosine tetraphosphate (Up4A) induces potent and partially endothelium-dependent relaxation in the healthy porcine coronary microvasculature. We subsequently showed that Up4A-induced porcine coronary relaxation was impaired via downregulation of P1 receptors after myocardial infarction. In view of the deleterious effect of metabolic derangement on vascular function, we hypothesized that the coronary vasodilator response to Up4A is impaired in metabolic derangement, and that the involvement of purinergic receptor subtypes and endothelium-derived vasoactive factors (EDVFs) is altered...
May 24, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28540528/sema3a-promotes-the-resolution-of-cardiac-inflammation-after-myocardial-infarction
#14
Marieke Rienks, Paolo Carai, Nicole Bitsch, Mark Schellings, Maarten Vanhaverbeke, Johan Verjans, Ilona Cuijpers, Stephane Heymans, Anna Papageorgiou
Optimal healing after myocardial infarction requires not only the induction of inflammation, but also its timely resolution. In patients, 30 days post myocardial infarction, circulating monocytes have increased expression of Semaphorin3A (Sema3A) as compared to directly after admission. This increased expression coincides with increased expression of Cx3CR1-a marker of non-classical monocytes that are important for immune resolution hence proper wound healing. In mice, the expression of Sema3A also increases in response to myocardial ischemia being expressed by infiltrating leukocytes...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28540527/alignment-of-inducible-vascular-progenitor-cells-on-a-micro-bundle-scaffold-improves-cardiac-repair-following-myocardial-infarction
#15
Anurag Jamaiyar, Weiguo Wan, Vahagn Ohanyan, Molly Enrick, Danielle Janota, Devan Cumpston, Hokyung Song, Kelly Stevanov, Christopher L Kolz, Tatev Hakobyan, Feng Dong, Bi-Min Zhang Newby, William M Chilian, Liya Yin
Ischemic heart disease is still the leading cause of death even with the advancement of pharmaceutical therapies and surgical procedures. Early vascularization in the ischemic heart is critical for a better outcome. Although stem cell therapy has great potential for cardiovascular regeneration, the ideal cell type and delivery method of cells have not been resolved. We tested a new approach of stem cell therapy by delivery of induced vascular progenitor cells (iVPCs) grown on polymer micro-bundle scaffolds in a rat model of myocardial infarction...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28540217/incremental-value-of-functional-assessment-over-coronary-anatomy-in-an-acute-myocardial-infarction-associated-with-mitral-valve-replacement
#16
Macarena Cynthia De Zan
We present the case of a patient with an aneurysm secondary to a complicated myocardial infarction associated to an occlusion of the obtuse marginal branches during or after valve replacement surgery.
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28540212/infarct-characterization-using-ct
#17
REVIEW
Ludovico La Grutta, Patrizia Toia, Erica Maffei, Filippo Cademartiri, Roberto Lagalla, Massimo Midiri
Myocardial infarction (MI) is a major cause of death and disability worldwide. The incidence is not expected to diminish, despite better prevention, diagnosis and treatment, because of the ageing population in industrialized countries and unhealthy lifestyles in developing countries. Nowadays it is highly requested an imaging tool able to evaluate MI and viability. Technology improvements determined an expansion of clinical indications from coronary plaque evaluation to functional applications (perfusion, ischemia and viability after MI) integrating additional phases and information in the mainstream examination...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28540209/myocardial-blood-flow-quantification-for-evaluation-of-coronary-artery-disease-by-computed-tomography
#18
REVIEW
Filippo Cademartiri, Sara Seitun, Alberto Clemente, Ludovico La Grutta, Patrizia Toia, Giuseppe Runza, Massimo Midiri, Erica Maffei
During the last decade coronary computed tomography angiography (CTA) has become the preeminent non-invasive imaging modality to detect coronary artery disease (CAD) with high accuracy. However, CTA has a limited value in assessing the hemodynamic significance of a given stenosis due to a modest specificity and positive predictive value. In recent years, different CT techniques for detecting myocardial ischemia have emerged, such as CT-derived fractional flow reserve (FFR-CT), transluminal attenuation gradient (TAG), and myocardial CT perfusion (CTP) imaging...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28540208/myocardial-ct-perfusion-imaging-for-ischemia-detection
#19
REVIEW
Patricia Carrascosa, Carlos Capunay
Coronary computed tomography angiography (CCTA) plays an important role in many specific scenarios such as in symptomatic patients with intermediate pretest of coronary artery disease (CAD), as well as in the triage of patients with acute chest pain with TIMI risk ≤2. However, it cannot detect the presence of associated ischemia, which is critical for clinical decision making among patients with moderate to severe stenosis. Although functional information can be obtained with different non-invasive tools, cardiac CT is the unique modality that can perform a comprehensive evaluation of coronary anatomy plus the functional significance of lesions...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28540207/novel-developments-of-ct-myocardial-perfusion-hemodynamic-assessment-derived-from-anatomy-infarct-characterization-and-role-of-microvascular-function
#20
Gaston A Rodriguez-Granillo, Patricia Carrascosa
No abstract text is available yet for this article.
April 2017: Cardiovascular Diagnosis and Therapy
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