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Heart remodeling

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https://www.readbyqxmd.com/read/28324981/hemodynamic-determinants-and-ventriculo-arterial-coupling-are-sex-associated-in-heart-failure-patients
#1
Peter L Kerkhof, Guy R Heyndrickx, John K-J Li
End-systolic volume (ESV) and end-diastolic volume (EDV) are key parameters in the analysis of left ventricular (LV) function, and the study of cardiac remodeling. The volume regulation graph (VRG) relates these fundamental determinants, and permits convenient stratification for clinically relevant covariates. This contribution analyzes sex-associated differences in hemodynamic parameters for 197 heart failure (HF) patients, evaluated by biplane ventriculography, in combination with arterial pressure. We calculated LV parameters such as stroke volume (SV), cardiac output (CO), ESV, EDV, ejection fraction (EF), end-systolic elastance (Emax), besides arterial parameters: effective arterial elastance (Ea), elastance ratio (the coupling index k), peripheral resistance (Rs), pulse pressure (PP), and arterial compliance (C), all normalized for body surface area when appropriate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323857/myocardial-ischemia-reperfusion-enhances-transcriptional-expression-of-endothelin-1-and-vasoconstrictor-etb-receptors-via-the-protein-kinase-mek-erk1-2-signaling-pathway-in-rat
#2
Gry Freja Skovsted, Lars Schack Kruse, Lukas Adrian Berchtold, Anne-Sofie Grell, Karin Warfvinge, Lars Edvinsson
BACKGROUND: Coronary artery remodelling and vasospasm is a complication of acute myocardial ischemia and reperfusion. The underlying mechanisms are complex, but the vasoconstrictor peptide endothelin-1 is suggested to have an important role. This study aimed to determine whether the expression of endothelin-1 and its receptors are regulated in the myocardium and in coronary arteries after experimental ischemia-reperfusion. Furthermore, we evaluated whether treatment with a specific MEK1/2 inhibitor, U0126, modified the expression and function of these proteins...
2017: PloS One
https://www.readbyqxmd.com/read/28319168/targeting-chronic-cardiac-remodeling-with-cardiac-progenitor-cells-in-a-murine-model-of-ischemia-reperfusion-injury
#3
Janine C Deddens, Dries A Feyen, Peter-Paul Zwetsloot, Maike A Brans, Sailay Siddiqi, Linda W van Laake, Pieter A Doevendans, Joost P Sluijter
BACKGROUND: Translational failure for cardiovascular disease is a substantial problem involving both high research costs and an ongoing lack of novel treatment modalities. Despite the progress already made, cell therapy for chronic heart failure in the clinical setting is still hampered by poor translation. We used a murine model of chronic ischemia/reperfusion injury to examine the effect of minimally invasive application of cardiac progenitor cells (CPC) in cardiac remodeling and to improve clinical translation...
2017: PloS One
https://www.readbyqxmd.com/read/28317477/circulating-biomarkers-of-collagen-metabolism-and-prognosis-of-heart-failure-with-reduced-or-mid-range-ejection-fraction
#4
Joana Moura Ferreira, Sara Moura Ferreira, Maria João Ferreira, Inês Falcão-Pires
BACKGROUND: Change in the architecture and composition of cardiac extracellular matrix is a key element in adverse cardiac remodeling that occurs during heart failure. Most of the times, the result is the development of fibrosis, which has a huge impact on the pathophysiology and clinical outcomes of heart failure syndromes. Several molecules related to collagen metabolism detectable in the blood have been proposed as biomarkers of myocardial fibrosis. Despite concerns regarding the true ability of these biomarkers to reflect quantitative and qualitative changes in myocardial collagen, a growing body of evidence suggests that they may play a potential role in several aspects of heart failure management...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28316086/cardiac-fibrosis-in-the-ageing-heart-contributors-and-mechanisms
#5
Lu Lu, Jingbin Guo, Yue Hua, Kevin Huang, Ruth Magaye, Jake Cornell, Darren J Kelly, Christopher Reid, Danny Liew, Yingchun Zhou, Aihua Chen, Wei Xiao, Qiang Fu, Bing Hui Wang
Cardiac fibrosis refers to an excessive deposition of extracellular matrix (ECM) in cardiac tissue. Fibrotic tissue is stiffer and less compliant, resulting in subsequent cardiac dysfunction and heart failure. Cardiac fibrosis in the ageing heart may involve activation of fibrogenic signalling and inhibition of anti-fibrotic signalling, leading to an imbalance of ECM turnover. Excessive accumulation of ECM such as collagen in older patients contributes to progressive ventricular dysfunction. Overexpression of collagen is derived from various sources, including higher levels of fibrogenic growth factors, proliferation of fibroblasts and cellular trans-differentiation...
March 18, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28315072/direct-myosin-activation-by-omecamtiv-mecarbil-for-heart-failure-with-reduced-ejection-fraction
#6
Mitchell A Psotka, John R Teerlink
Myosin is the indispensable molecular motor that utilizes chemical energy to produce force for contraction within the cardiac myocyte. Myosin activity is gated by intracellular calcium levels which are regulated by multiple upstream signaling cascades that can be altered for clinical utility using inotropic medications. In contrast to clinically available cardiac inotropes, omecamtiv mecarbil is a novel direct myosin activator developed to augment left ventricular systolic function without the undesirable secondary effects of altered calcium homeostasis...
March 18, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28314377/the-effects-of-scaffold-remnants-in-decellularized-tissue-engineered-cardiovascular-constructs-on-the-recruitment-of-blood-cells
#7
Bart Sanders, Anita Driessen-Mol, Carlijn Bouten, Frank Baaijens
Decellularized tissue engineered heart valves (DTEHVs) showed remarkable results in translational animal models, leading to recellularization within hours after implantation. This is crucial to enable tissue remodeling. To investigate if the presence of scaffold remnants prior to implantation is responsible for the fast recellularization of DTEHVs, an in vitro mesofluidic system was used. Human granulocyte and agranulocyte fractions were isolated, stained, brought back in suspension, and implemented in the system...
March 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28302203/-changes-in-serum-chromogranin-a-and-urotensin-ii-levels-in-children-with-chronic-heart-failure
#8
Yao-Yao Cheng, Jin-Dou An, Song Feng, Wei Ge
OBJECTIVE: To examine the changes in serum chromogranin A (CgA) and urotensin II (U II) levels in children with chronic heart failure (CHF) and their clinical significance. METHODS: A total of 58 children with CHF, among whom 17 had endocardial fibroelastosis (EFE) and 41 had dilated cardiomyopathy (DCM), were selected as CHF group, and 20 healthy children were selected as control group. Serum levels of CgA and U II were measured using enzyme-linked immunosorbent assay, and the level of N-terminal pro-brain natriuretic peptide (NT-proBNP) was determined by bi-directional lateral flow immunoassay...
March 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28301315/time-and-age-dependent-decrease-of-nt-probnp-after-septal-myectomy-in-hypertrophic-obstructive-cardiomyopathy
#9
Hao Cui, Xi Wu, Shuiyun Wang, Bing Tang, Changsheng Zhu, Haibo Chen, Xiaohui Zhou, Rong Wu, Qinjun Yu, Xiaohong Huang
BACKGROUND: NT-proBNP level is a predictive factor in hypertrophic cardiomyopathy patients, in which left ventricular outflow tract obstruction contributes to an increased NT-proBNP level. However, studies regarding the influence of septal myectomy on NT-proBNP level in hypertrophic obstructive cardiomyopathy are lacking. METHODS: One hundred and eighty-two patients who underwent septal myectomy in Fuwai Hospital from May 2011 to March 2016 and were included in the present study...
March 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28298286/echo-parameters-for-differential-diagnosis-in-cardiac-amyloidosis-a-head-to-head-comparison-of-deformation-and-nondeformation-parameters
#10
Efstathios D Pagourelias, Oana Mirea, Jürgen Duchenne, Johan Van Cleemput, Michel Delforge, Jan Bogaert, Tatyana Kuznetsova, Jens-Uwe Voigt
BACKGROUND: A plethora of echo parameters has been suggested for distinguishing cardiac amyloidosis (CA) from other causes of myocardial thickening with, however, scarce data on their head-to-head comparison. This study aimed at comparing the diagnostic accuracy of various deformation and conventional echo parameters in differentiating CA from other hypertrophic substrates, especially in the gray zone of mild hypertrophy (maximum wall thickness ≤16 mm) or normal ejection fraction (EF)...
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28298284/changes-in-body-weight-and-composition-are-associated-with-changes-in-left-ventricular-geometry-and-function-in-the-general-population-ship-study-of-health-in-pomerania
#11
Marcello Ricardo Paulista Markus, Nicole Werner, Sabine Schipf, Ulrike Siewert-Markus, Martin Bahls, Sebastian Edgar Baumeister, Henry Völzke, Stephan Burkhard Felix, Till Ittermann, Marcus Dörr
BACKGROUND: The different effects of total body weight (TBW), fat-free mass (FFM), and fat mass (FM) on left ventricular (LV) geometry and function are complex. We investigated the associations of changes over time in TBW, FM, and FFM with changes in LV geometry and function. METHODS AND RESULTS: We analyzed data from 1189 subjects (694 women), aged 44 to 86 years, from the baseline and the 5-year follow-up examination of the population-based SHIP (Study of Health in Pomerania)...
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28295648/echocardiographic-assessment-of-right-ventricular-size-and-function-in-cats-with-hypertrophic-cardiomyopathy
#12
L C Visser, C Q Sloan, J A Stern
BACKGROUND: Studies evaluating right ventricular (RV) structural and functional abnormalities in feline hypertrophic cardiomyopathy (HCM) are limited. HYPOTHESIS: Right ventricular structural and functional abnormalities are present in cats with HCM and are associated with clinical severity. ANIMALS: Eighty-one client-owned cats. METHODS: Retrospective 2-dimensional (2D) echocardiographic study. Right atrial diameter (RAD), RV free wall thickness (RVFWd), RV internal dimension (RVIDd), RV fractional area change (FAC), and tricuspid annular plane systolic excursion (TAPSE) were measured in control cats (n = 26), cats with subclinical HCM (subclinical HCM; n = 31), and cats with HCM and congestive heart failure (HCM + CHF; n = 24)...
March 13, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28294861/-early-diagnostics-and-mathematical-prediction-models-remodeling-of-the-heart-at-patients-with-atopic-bronchial-asthma
#13
I A Soloveva, E A Sobko, I V Demko, A Yu Kraposhina, N V Gordeeva, N S Eydemiller, A Yu Burakov
No abstract text is available yet for this article.
April 2016: Kardiologiia
https://www.readbyqxmd.com/read/28293100/adenosine-a2a-receptor-agonist-prevents-cardiac-remodeling-and-dysfunction-in-spontaneously-hypertensive-male-rats-after-myocardial-infarction
#14
Jaqueline S da Silva, Daniele Gabriel-Costa, Roberto T Sudo, Hao Wang, Leanne Groban, Emanuele B Ferraz, José Hamilton M Nascimento, Carlos Alberto M Fraga, Eliezer J Barreiro, Gisele Zapata-Sudo
BACKGROUND: This work evaluated the hypothesis that 3,4-methylenedioxybenzoyl-2-thienylhydrazone (LASSBio-294), an agonist of adenosine A2A receptor, could be beneficial for preventing cardiac dysfunction due to hypertension associated with myocardial infarction (MI). METHODS: Male spontaneously hypertensive rats (SHR) were randomly divided into four groups (six animals per group): sham-operation (SHR-Sham), and myocardial infarction rats (SHR-MI) were treated orally either with vehicle or LASSBio-294 (10 and 20 mg...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28290894/-clinical-and-ultrasonographic-characteristics-of-women-with-gestational-hypertension
#15
N A Konyshko, T E Morosova
We studied clinical and ultrasonographic parameters in pregnant women - 183 with and 152 without gestational arterial hypertension (GAP). Characteristics of women with GAP were as follows: age 16-45 years, mean age 27.9+/-4.7 years, disease duration 8.8+/-4.0 weeks, mean systolic and diastolic blood pressure at initial examination 150.2+/-4.8 and 93.1+/-6 mm Hg, respectively. Results of this study allowed us to make the following conclusions. Social, historical, constitutional parameters can contribute to the development of hypertension during pregnancy...
October 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290874/-the-impact-of-asymptomatic-left-ventricular-dilatation-on-the-course-of-anterior-myocardial-infarction
#16
M T Beishenkulov, A K Ibraeva, Z M Chazymova
AIM: to elucidate effect of asymptomatic left ventricular (LV) dilatation on the course of myocardial infarction (MI). MATERIAL AND METHODS: LV remodeling and diastolic function, as well as inter- and intraventricular asynchrony were studied in 58 patients with primary anterior MI without signs of heart failure and ejection fraction >40% on month 12 of the disease. Patients were divided into 2 groups: with normal-sized left ventricle (LV end diastolic size [EDS] <5...
August 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290814/-assessment-of-the-impact-of-nicorandil-on-the-quality-of-life-and-prognosis-indicators-in-patients-with-stable-angina
#17
Ryabikhin Ryabikhin, M E Mozheiko, Y Krasilnikova
OBJECTIVE: To study the effect of nicorandil on the elasticity of the great vessels, cardiac functional parameters and quality of life in patients with coronary heart disease (CHD). MATERIAL AND METHODS: In a double-blind, randomized, placebo-controlled trial of nicorandil was attended by 154 patients with stable angina III functional class (FC), divided into 2 comparable age and sex group. Study duration was 12 months. RESULTS: In the group treated with nicorandil compared with placebo, the number of angina attacks and nitrate intake of short-significantly reduced, improved elastic properties of large arteries, improved quality of life...
December 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290548/atrial-structure-function-and-arrhythmogenesis-in-aged-and-frail-mice
#18
Hailey J Jansen, Motahareh Moghtadaei, Martin Mackasey, Sara A Rafferty, Oleg Bogachev, John L Sapp, Susan E Howlett, Robert A Rose
Atrial fibrillation (AF) is prevalent in aging populations; however not all individuals age at the same rate. Instead, individuals of the same chronological age can vary in health status from fit to frail. Our objective was to determine the impacts of age and frailty on atrial function and arrhythmogenesis in mice using a frailty index (FI). Aged mice were more frail and demonstrated longer lasting AF compared to young mice. Consistent with this, aged mice showed longer P wave duration and PR intervals; however, both parameters showed substantial variability suggesting differences in health status among mice of similar chronological age...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28290476/emerin-plays-a-crucial-role-in-nuclear-invagination-and-in-the-nuclear-calcium-transient
#19
Masaya Shimojima, Shinsuke Yuasa, Chikaaki Motoda, Gakuto Yozu, Toshihiro Nagai, Shogo Ito, Mark Lachmann, Shin Kashimura, Makoto Takei, Dai Kusumoto, Akira Kunitomi, Nozomi Hayashiji, Tomohisa Seki, Shugo Tohyama, Hisayuki Hashimoto, Masaki Kodaira, Toru Egashira, Kenshi Hayashi, Chiaki Nakanishi, Kenji Sakata, Masakazu Yamagishi, Keiichi Fukuda
Alteration of the nuclear Ca(2+) transient is an early event in cardiac remodeling. Regulation of the nuclear Ca(2+) transient is partly independent of the cytosolic Ca(2+) transient in cardiomyocytes. One nuclear membrane protein, emerin, is encoded by EMD, and an EMD mutation causes Emery-Dreifuss muscular dystrophy (EDMD). It remains unclear whether emerin is involved in nuclear Ca(2+) homeostasis. The aim of this study is to elucidate the role of emerin in rat cardiomyocytes by means of hypertrophic stimuli and in EDMD induced pluripotent stem (iPS) cell-derived cardiomyocytes in terms of nuclear structure and the Ca(2+) transient...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28290005/how-to-treat-tricuspid-valve-disease-what-s-new-on-the-horizon
#20
REVIEW
Karina Brüstle, Christelle Calen, Shingo Kuwata, Fabian Nietlispach, Michel Zuber, Francesco Maisano, Maurizio Taramasso
Tricuspid regurgitation is frequent and is most often caused by annular dilatation and leaflet tethering from adverse right ventricular remodeling in response to several disease processes (functional tricuspid regurgitation), while primary/organic tricuspid valve regurgitation is less common. Surgical intervention for tricuspid regurgitation is usually performed concomitantly to left-sided heart valve surgery. In isolated significant tricuspid regurgitation, however, many patients are left unoperated as they commonly are considered at very high or prohibitive surgical risk...
March 2017: Current Treatment Options in Cardiovascular Medicine
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