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Ventricular hypertrophy

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https://www.readbyqxmd.com/read/28549058/histone-deacetylase-adaptation-in-single-ventricle-heart-disease-and-a-young-animal-model-of-right-ventricular-hypertrophy
#1
Weston W Blakeslee, Kimberly M Demos-Davies, Douglas D Lemon, Katharina M Lutter, Maria A Cavasin, Sam Payne, Karin Nunley, Carlin S Long, Timothy A McKinsey, Shelley D Miyamoto
BACKGROUNDHistone deacetylase (HDAC) inhibitors are promising therapeutics for various forms of cardiac disease. The purpose of this study was to assess cardiac HDAC catalytic activity and expression in children with single ventricle heart disease of right ventricular morphology (SV), as well as in a rodent model of right ventricular hypertrophy (RVH).METHODSHomogenates of RV explants from non-failing controls and SV children were assayed for HDAC catalytic activity and HDAC isoform expression. Postnatal 1-day old rat pups were placed in hypoxic conditions and echocardiographic analysis, gene expression, HDAC catalytic activity and isoform expression studies of the RV were performed...
May 26, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28548091/cellular-interplay-via-cytokine-hierarchy-causes-pathological-cardiac-hypertrophy-in-raf1-mutant-noonan-syndrome
#2
Jiani C Yin, Mathew J Platt, Xixi Tian, Xue Wu, Peter H Backx, Jeremy A Simpson, Toshiyuki Araki, Benjamin G Neel
Noonan syndrome (NS) is caused by mutations in RAS/ERK pathway genes, and is characterized by craniofacial, growth, cognitive and cardiac defects. NS patients with kinase-activating RAF1 alleles typically develop pathological left ventricular hypertrophy (LVH), which is reproduced in Raf1(L613V/+) knock-in mice. Here, using inducible Raf1(L613V) expression, we show that LVH results from the interplay of cardiac cell types. Cardiomyocyte Raf1(L613V) enhances Ca(2+) sensitivity and cardiac contractility without causing hypertrophy...
May 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28546535/a-novel-prkag2-mutation-in-a-chinese-family-with-cardiac-hypertrophy-and-ventricular-pre-excitation
#3
Kun-Qi Yang, Chao-Xia Lu, Ying Zhang, Yan-Kun Yang, Jia-Cheng Li, Tian Lan, Xu Meng, Peng Fan, Tao Tian, Lin-Ping Wang, Ya-Xin Liu, Xue Zhang, Xian-Liang Zhou
PRKAG2 syndrome is a rare autosomal dominant inherited disorder that is characterized by cardiac hypertrophy, ventricular pre-excitation and conduction system abnormalities. There is little knowledge in cardiovascular magnetic resonance (CMR) characteristics of PRKAG2 cardiomyopathy. This study investigated the genetic defect in a three-generation Chinese family with cardiac hypertrophy and ventricular pre-excitation using whole-exome sequencing. A novel missense mutation, c.1006 G > T (p.V336L), was identified in PRKAG2...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546456/electrocardiographic-predictors-of-heart-failure-with-reduced-versus-preserved-ejection-fraction-the-multi-ethnic-study-of-atherosclerosis
#4
Wesley T O'Neal, Matylda Mazur, Alain G Bertoni, David A Bluemke, Mouaz H Al-Mallah, Joao A C Lima, Dalane Kitzman, Elsayed Z Soliman
BACKGROUND: Several markers detected on the routine 12-lead ECG are associated with future heart failure events. We examined whether these markers are able to separate the risk of heart failure with reduced ejection fraction (HFrEF) from heart failure with preserved ejection fraction (HFpEF). METHODS AND RESULTS: We analyzed data of 6664 participants (53% female; mean age 62±10 years) from MESA (Multi-Ethnic Study of Atherosclerosis) who were free of cardiovascular disease at baseline (2000-2002)...
May 25, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28545342/echocardiographic-and-clinical-findings-in-patients-with-fabry-disease-during-long-term-enzyme-replacement-therapy-a-nationwide-danish-cohort-study
#5
Christoffer Valdorff Madsen, Henning Bundgaard, Åse Krogh Rasmussen, Søren Schwartz Sørensen, Jørgen Holm Petersen, Lars Køber, Ulla Feldt-Rasmussen, Helle Petri
OBJECTIVES: In patients with Fabry disease (FD), left ventricular hypertrophy and arrhythmias are frequently observed and cardiac involvement is the leading cause of death. Long-term efficacy of enzyme replacement therapy (ERT) on cardiac involvement is unclear. We assessed and compared long-term progression of cardiac involvement according to ERT and non-ERT. METHODS: We retrospectively assessed and compared long-term progression of cardiac involvement in adult patients with FD in the nationwide Danish cohort...
May 25, 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/28543102/low-flow-low-gradient-aortic-stenosis-still-a-diagnostic-and-therapeutic-challenge
#6
REVIEW
Anja Vogelgesang, Gerd Hasenfuss, Claudius Jacobshagen
Aortic stenosis (AS) is the most frequently observed valvular heart disease. During the symptomatic stage, the rate of death increases dramatically, so that a precise diagnostic approach is taken to guide therapeutic options. Of patients with severe AS, 30% to 50% present with low-flow/low-gradient AS (LF/LGAS) status. This review focuses on LF/LGAS and the best diagnostic and therapeutic management in either classic LF/LGAS with reduced left ventricular ejection fraction (LVEF) or paradoxical LF/LGAS with preserved LVEF...
May 23, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28542952/compensatory-and-decompensatory-alterations-in-cardiomyocyte-ca-2-dynamics-in-hearts-with-diastolic-dysfunction-following-aortic-banding
#7
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/28542658/-cardiovascular-disease-in-pediatric-patients-under-chronic-peritoneal-dialysis
#8
Paula Lehmann F, Francisco Cano Sc
Peritoneal dialysis (PD) is the most common renal replacement therapy used in pediatric patients with end stage renal disease. This population has a mortality rate 1,000 times greater compare to pediatric population, mainly due to cardiovascular causes. OBJECTIVE: To characterize pediatric patients on chronic PD in relation to dialysis and cardiovascular outcome. PATIENTS AND METHODS: Cross sectional study. Patients in stable PD according to DOQI criteria were selected...
April 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28541499/hypertension-and-cardiac-arrhythmias-executive-summary-of-a-consensus-document-from-the-european-heart-rhythm-association-ehra-and-esc-council-on-hypertension-endorsed-by-the-heart-rhythm-society-hrs-asia-pacific-heart-rhythm-society-aphrs-and-sociedad-latinoamericana
#9
Gregory Y H Lip, Antonio Coca, Thomas Kahan, Giuseppe Boriani, Antonis S Manolis, Michael Hecht Olsen, Ali Oto, Tatjana S Potpara, Jan Steffel, Francisco Marín, Márcio Jansen de Oliveira Figueiredo, Giovanni de Simone, Wendy S Tzou, Chern En Chiang, Bryan Williams
Hypertension (HTN) is a common cardiovascular risk factor leading to heart failure (HF), coronary artery disease (CAD), stroke, peripheral artery disease and chronic renal failure. Hypertensive heart disease can manifest as many types of cardiac arrhythmias, most commonly being atrial fibrillation (AF). Both supraventricular and ventricular arrhythmias may occur in HTN patients, especially in those with left ventricular hypertrophy (LVH), CAD or HF. In addition, high doses of thiazide diuretics commonly used to treat hypertension, may result in electrolyte abnormalities (eg...
May 25, 2017: European Heart Journal. Cardiovascular Pharmacotherapy
https://www.readbyqxmd.com/read/28539381/impact-of-chamber-dilatation-on-the-prognostic-value-of-left-ventricular-geometry-in-hypertension
#10
Paolo Verdecchia, Fabio Angeli, Giovanni Mazzotta, Claudia Bartolini, Marta Garofoli, Adolfo Aita, Cristina Poltronieri, Maria Gabriella Pinzagli, Francesca Valecchi, Stefania Martone, Elisa Ramundo, Dario Turturiello, Gianpaolo Reboldi
BACKGROUND: The different geometric patterns of the left ventricle may or may not coexist with chamber dilatation. The prognostic impact of such a combination is unclear. METHODS AND RESULTS: We studied a cohort of 2635 initially untreated patients with hypertension, mean age 50 years. At entry, 24-hour ambulatory blood pressure progressively increased across the patterns of normal geometry, concentric left ventricular (LV) remodeling, eccentric nondilated LV hypertrophy (LVH), eccentric dilated LVH, concentric nondilated LVH, and concentric dilated LVH...
May 24, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28537760/caveolin-1-autophagy-pathway-mediated-cardiomyocyte-hypertrophy-induced-by-apelin-13
#11
Di Wu, Feng Xie, Ling Xiao, Fen Feng, Shifang Huang, Lu He, Meiqing Liu, Qun Zhou, Lanfang Li, Linxi Chen
Apelin, an endogenous ligand for apelin receptor (APJ), is reported to be involved in cardiomyocyte hypertrophy. In this study, we explored the mechanism of cardiomyocyte hypertrophy induced by apelin-13/APJ system. Left ventricular hypertrophy (LVH) rat model was established by constricting the abdominal aorta. Western blots were used for protein expression in LVH rats and cultured H9c2 cardiomyocytes. Transmission electron microscopy (TEM) was used to monitor morphological features of cells. In addition, the diameter and volume of H9c2 cells were detected by Scepter™ Handheld Automated Cell Counter...
May 24, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28537040/accuracy-of-99mtc-hydroxymethylene-diphosphonate-scintigraphy-for-diagnosis-of-transthyretin-cardiac-amyloidosis
#12
Francesco Cappelli, Chiara Gallini, Carlo Di Mario, Egidio Natalino Costanzo, Luca Vaggelli, Francesca Tutino, Alfonso Ciaccio, Simone Bartolini, Paola Angelotti, Sabrina Frusconi, Silvia Farsetti, Giuseppe Vergaro, Assuero Giorgetti, Paolo Marzullo, Dario Genovesi, Michele Emdin, Federico Perfetto
BACKGROUND AND AIM: Either 99mTechnetium diphosphonate (Tc-DPD) or pyrophosphate (Tc-PYP) scintigraphy plays a relevant role in diagnosing transthyretin cardiac amyloidosis (CA), and labeled radiotracers have been extensively studied in diagnosing CA. Few studies have analyzed and validated 99mTc-Hydroxymethylene diphosphonate (Tc-HMDP). Our aim was to validate the diagnostic accuracy of Tc-HMDP total-body scintigraphy in a cohort of patients with biopsy-proven transthyretin CA. METHODS AND RESULTS: We retrospectively evaluated all patients undergoing 99mTc-HMDP total-body scintigraphy, in adjunct to a comprehensive diagnostic work-up for suspected CA...
May 23, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28536896/helical-distribution-of-hypertrophy-in-patients-with-hypertrophic-cardiomyopathy-prevalence-and-clinical-implications
#13
Dafne Viliani, Eduardo Pozo, Norma Aguirre, Alberto Cecconi, María J Olivera, Paloma Caballero, Luis J Jiménez-Borreguero, Fernando Alfonso
Recently a novel pattern of helical distribution of hypertrophy has been described in patients with hypertrophic cardiomyopathy (HCM). Our aim was to determine its prevalence and potential implications in an unselected cohort. One-hundred- and eight consecutive patients diagnosed with HCM by cardiac magnetic resonance (CMR) were included (median clinical follow up of 1718 days). All clinical and complementary test information was prospectively collected. The presence of a helical pattern was assessed by a simple measurement of the maximal left ventricle (LV) wall thickness (LVWT) for each of the 17 classical LV segments and it was classified in one of three types according to its extension...
May 23, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28535761/the-emerging-role-of-cardiovascular-magnetic-resonance-in-the-evaluation-of-hypertensive-heart-disease
#14
REVIEW
Sophie Mavrogeni, Vasiliki Katsi, Vasiliki Vartela, Michel Noutsias, George Markousis-Mavrogenis, Genovefa Kolovou, Athanasios Manolis
BACKGROUND: Arterial hypertension is the commonest cause of cardiovascular death. It may lead to hypertensive heart disease (HHD), including heart failure (HF), ischemic heart disease (IHD) and left ventricular hypertrophy (LVH). MAIN BODY: According to the 2007 ESH/ESC guidelines, the recommended imaging technique is echocardiography (echo), when a more sensitive detection of LVH than that provided by ECG, is needed. Cardiovascular Magnetic Resonance (CMR), a non-invasive, non-radiating technique, offers the following advantages, beyond echo: a) more reliable and reproducible measurements of cardiac parameters such as volumes, ejection fraction and cardiac mass b) more accurate differentiation of LVH etiology by providing information about tissue characterisation c) more accurate evaluation of myocardial ischemia, specifically if small vessels disease is present d) technique of choice for diagnosis of renovascular, aortic tree/branches lesions and quantification of aortic valve regurgitation e) technique of choice for treatment evaluation in clinical trials...
May 23, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28535521/fibroblast-growth-factor-23-mineral-metabolism-and-beyond
#15
Alexander Grabner, Sandro Mazzaferro, Giuseppe Cianciolo, Stefanie Krick, Irene Capelli, Silverio Rotondi, Claudio Ronco, Gaetano La Manna, Christian Faul
Patients affected by chronic kidney disease (CKD) exhibit a high risk of cardiovascular mortality that is poorly explained by traditional risk factors. There is a growing awareness about the role of derangement of mineral metabolism that is currently accepted as a trigger and sustainer of cardiovascular disease (CVD) in CKD patients. The synthetic definition of CKD mineral and bone disorder (CKD-MBD) split the concept that the indexes of mineral metabolism extend their effects beyond the bone until the vascular wall and metabolic milieu of CKD patients through complex pathways...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28530078/-athlete-s-heart-the-more-the-merrier
#16
REVIEW
Reut Shavit, Michael Glikson, Naama Constantini
Regular moderate exercise training is effective for the prevention and treatment of many common chronic diseases and improves cardiovascular health and life expectancy. However, long-term excessive endurance exercise may induce pathological structural remodeling of the heart. The athlete's heart is characterized by enlargement of cardiac chambers and eccentric hypertrophy with preserved myocardial function as normal physiological adaptations for prolonged and intense endurance physical stress. However, recent studies have demonstrated transient right ventricular dysfunction and elevation of cardiac biomarkers following intense endurance exercise...
September 2016: Harefuah
https://www.readbyqxmd.com/read/28529483/identification-of-a-novel-allosteric-inhibitory-site-on-tryptophan-hydroxylase-1-enabling-unprecedented-selectivity-over-all-related-hydroxylases
#17
Mike Petrassi, Rob Barber, Celine Be, Sarah Beach, Brian Cox, Anne-Marie D'Souza, Nick Duggan, Martin Hussey, Roy Fox, Peter Hunt, Gabor Jarai, Takatoshi Kosaka, Paul Oakley, Viral Patel, Neil Press, David Rowlands, Clemens Scheufler, Oliver Schmidt, Honnappa Srinivas, Mary Turner, Rob Turner, John Westwick, Alison Wolfreys, Nuzhat Pathan, Simon Watson, Matthew Thomas
Pulmonary arterial hypertension (PAH) has demonstrated multi-serotonin receptor dependent pathologies, characterized by increased tone (5-HT1B receptor) and complex lesions (SERT, 5-HT1B, 5-HT2B receptors) of the pulmonary vasculature together with right ventricular hypertrophy, ischemia and fibrosis (5-HT2B receptor). Selective inhibitors of individual signaling elements - SERT, 5-HT2A, 5HT2B, and combined 5-HT2A/B receptors, have all been tested clinically and failed. Thus, inhibition of tryptophan hydroxylase 1 (TPH1), the rate limiting step in 5-HT synthesis, has been suggested as a more broad, and thereby more effective, mode of 5-HT inhibition...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28526910/expression-and-regulation-of-type-2a-protein-phosphatases-and-alpha4-signalling-in-cardiac-health-and-hypertrophy
#18
Olga Eleftheriadou, Andrii Boguslavskyi, Michael R Longman, Jonathan Cowan, Asvi Francois, Richard J Heads, Brian E Wadzinski, Ali Ryan, Michael J Shattock, Andrew K Snabaitis
Cardiac physiology and hypertrophy are regulated by the phosphorylation status of many proteins, which is partly controlled by a poorly defined type 2A protein phosphatase-alpha4 intracellular signalling axis. Quantitative PCR analysis revealed that mRNA levels of the type 2A catalytic subunits were differentially expressed in H9c2 cardiomyocytes (PP2ACβ > PP2ACα > PP4C > PP6C), NRVM (PP2ACβ > PP2ACα = PP4C = PP6C), and adult rat ventricular myocytes (PP2ACα > PP2ACβ > PP6C > PP4C)...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28524259/nonpegylated-liposomal-doxorubicin-combination-regimen-in-patients-with-diffuse-large-b-cell-lymphoma-and-cardiac-comorbidity-results-of-the-heart01-phase-ii-trial-conducted-by-the-fondazione-italiana-linfomi
#19
Stefano Luminari, Elda Viel, Andrés José Maria Ferreri, Francesco Zaja, Emanuela Chimienti, Gerardo Musuraca, Alessandra Tucci, Monica Balzarotti, Monica Tani, Francesca Salvi, Emanuela A Pesce, Angela Ferrari, Anna M Liberati, Antonio Spadea, Dario Marino, Maria Bruno-Ventre, Stefano Volpetti, Chiara Bottelli, Elena Ravaioli, Francesco Merli, Michele Spina
The purpose of this phase 2, multicenter study was to determine the activity and safety of nonpegylated liposomal doxorubicin as part of "R-COMP" combination in patients with diffuse large B-cell lymphoma and coexisting cardiac disorders. The study was conducted using a Bayesian continuing assessment method using complete remission rate and rate of cardiac events as study endpoints. Between November 2009 and October 2011, 50 evaluable patients were enrolled (median age, 76 years). Median baseline left ventricular ejection fraction (LVEF) was 60%...
May 19, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28523323/discovery-of-a-new-mutation-in-the-desmin-gene-in-a-young-patient-with-cardiomyopathy-and-muscular-weakness
#20
Ruxandra Oana JurcuŢ, Alexandra Eugenia Bastian, Sebastian Militaru, Aura Popa, Emilia Manole, Bogdan Alexandru Popescu, Jonna Tallila, Bogdan Ovidiu Popescu, Carmen Doina Ginghină
A 25-year-old woman with a five years history of syncope, mild left ventricular hypertrophy and moderately enlarged atria, was diagnosed with third degree atrioventricular heart block alternating with atrioventricular heart block 2:1, and received a dual chamber pacemaker. After three years of evolution, she developed atrial fibrillation, marked biatrial enlargement, severely depressed longitudinal myocardial velocities, associated with mild girdle weakness and slight increase in creatine kinase level. The diagnosis of restrictive cardiomyopathy with mild skeletal myopathy imposed the screening for a common etiology...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
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