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Left ventricle Hypertrophy

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https://www.readbyqxmd.com/read/28439652/myocardial-extracellular-volume-fraction-quantified-by-cardiovascular-magnetic-resonance-is-increased-in-hypertension-and-associated-with-left-ventricular-remodeling
#1
Shuli Wang, Hongjie Hu, Minjie Lu, Arlene Sirajuddin, Jinghui Li, Jing An, Xiuyu Chen, Gang Yin, Tian Lan, Linlin Dai, Yan Zhang, Xiaorong Yin, Lei Song, Aimin Dang, Peter Kellman, Andrew E Arai, Shihua Zhao
OBJECTIVES: To determine whether extracellular volume fraction (ECV) quantification by cardiac magnetic resonance (CMR) can demonstrate left ventricle (LV) abnormalities and relationship between ECV and LV remodeling in hypertension (HTN) patients METHODS: ECV quantification was prospectively performed in 134 consecutive HTN patients and 97 healthy subjects. Individual and regional ECV were compared to the regions on late gadolinium enhancement (LGE) images. Statistical analysis of the relationship between LV global functional parameters and ECV was carried out using Pearson's correlation, Student's t test and multiple regressions...
April 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28431936/galectin-3-mediates-the-pulmonary-arterial-hypertension-induced-right-ventricular-remodeling-through-interacting-with-nadph-oxidase-4
#2
Jingni He, Xiaohui Li, Hui Luo, Tangzhiming Li, Lin Zhao, Qiangqiang Qi, Yuwei Liu, Zaixin Yu
Pulmonary arterial hypertension (PAH) is a progressive disorder that affects both pulmonary vasculature and the heart. The response of the right ventricle (RV) to the increased afterload is an important determinant of the PAH final outcome. Galectin-3 (Gal-3), a novel biomarker in left cardiac remodeling, takes part in multiple pathophysiological processes including the inflammation, fibrosis, immunity, and oxidative stress. The levels of Gal-3 are elevated in PAH patients, although the exact mechanisms underlie the PAH-induced right ventricular structural changes remain unclear...
March 27, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28412087/pregestational-type-2-diabetes-mellitus-induces-cardiac-hypertrophy-in-the-murine-embryo-through-cardiac-remodeling-and-fibrosis
#3
Xue Lin, Penghua Yang, E Albert Reece, Peixin Yang
BACKGROUND: Cardiac hypertrophy is highly prevalent in patients with type 2 diabetes mellitus (T2DM). Experimental evidence has implied that pregnant women with T2DM and their children are at an increased risk of cardiovascular diseases. Our previous mouse model study has revealed that maternal T2DM induces structural heart defects in their offspring. OBJECTIVE: The present study aims to determine whether maternal T2DM induces embryonic heart hypertrophy in a murine model of diabetic embryopathy...
April 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28410632/evolution-of-left-ventricular-size-in-late-survivors-of-surgery-for-hypoplastic-left-heart-syndrome
#4
Markus Bjurbom, Ajay J Iyengar, Florian Moenkemeyer, Igor E Konstantinov, Christian P Brizard, Yves d'Udekem
BACKGROUND: Aortic atresia and mitral atresia are predictors of adverse events in early life in patients with hypoplastic left heart syndrome, but it is unclear whether late outcomes are also affected, and whether this impact is related to a small hypertrophied left ventricle (LV) that impairs right ventricle (RV) function. METHODS: Thirty patients with hypoplastic left heart syndrome surviving with a Fontan procedure were identified. Follow-up echocardiograms were available at birth, before the Fontan procedure, and several years after...
April 12, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28408782/assessment-of-regional-left-ventricular-systolic-function-by-strain-imaging-echocardiography-in-phenotypically-normal-and-abnormal-maine-coon-cats-tested-for-the-a31p-mutation-in-the-mybpc3-gene
#5
Arine Pellegrino, Alexandre G T Daniel, Guilherme G Pereira, Paula H Itikawa, Maria Helena M A Larsson
Myocardial dysfunction occurs in cats with hypertrophic cardiomyopathy (HCM), but little is known about the early stages of the disease. Strain imaging echocardiography is a method that enables the quantitative assessment of myocardial function and deformity, allowing the characterization of systolic dysfunction. The objective of this study was to assess systolic function using strain imaging echocardiography in Maine coon cats genetically tested for the A31P mutation in the MYBPC3 gene, with and without ventricular hypertrophy...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28406705/tolerance-of-isolated-rabbit-hearts-to-short-ischemic-periods-is-affected-by-increased-lv-mass-fraction
#6
M Hlaváčová, V Olejníčková, M Ronzhina, T Stračina, O Janoušek, M Nováková, P Babula, J Kolářová, I Provazník, H Paulová
Hypertrophied hearts are known for increased risk of arrhythmias and are linked with reduced ischemic tolerance. However, still little is known about state characterized only by increased left ventricle (LV) mass fraction. Seventeen isolated rabbit hearts with various LV mass were divided into two groups according to LV weight/heart weight ratio (LVW/HW ratio), namely group H and L (with higher and lower LVW/HW ratio, respectively) and underwent three short cycles of global ischemia and reperfusion. The differences in electrogram (heart rate, QRS(max), mean number, onset and dominant form of ventricular premature beats) and in biochemical markers of myocardial injury (creatine kinase, lactate dehydrogenase - LDH) and lipid peroxidation (4-hydroxy-2-nonenal - 4-HNE) were studied...
April 12, 2017: Physiological Research
https://www.readbyqxmd.com/read/28389667/female-rats-with-severe-left-ventricle-volume-overload-exhibit-more-cardiac-hypertrophy-but-fewer-myocardial-transcriptional-changes-than-males
#7
Catherine Beaumont, Élisabeth Walsh-Wilkinson, Marie-Claude Drolet, Élise Roussel, Marie Arsenault, Jacques Couet
Aortic valve regurgitation (AR) imposes a volume overload (VO) to the left ventricle (LV). Male rats with a pathological heart overload usually progress more quickly towards heart failure than females. We examined whether a sexual dimorphism exists in the myocardial transcriptional adaptations to AR. Adult Wistar male and female rats either underwent a sham operation or were induced with AR and then followed for 26 weeks. Female AR rats gained relatively more LV mass than males (75 vs. 42%). They had a similar increase in LV chamber dimensions compared to males but more wall thickening...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28379420/improvements-in-left-ventricular-twist-mechanics-following-myectomy-for-hypertrophic-cardiomyopathy-with-mid-ventricular-obstruction
#8
Srilakshmi M Adhyapak, Prahlad G Menon, V Rao Parachuri
We aimed to evaluate left ventricle twist mechanics in mid-ventricular obstructive and apical type of hypertrophic cardiomyopathy and changes induced by myectomy. We studied 3 consecutive patients by cardiac magnetic resonance preoperatively and 6 weeks after myectomy. We calculated the apical and basal rotations at the base and apex respectively. All 3 patients underwent myectomy by the standard described technique. The basal rotations remained the same, while there was an improvement in the maximal apical rotation from 0...
March 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28373008/loss-of-nrf2-promotes-rapid-progression-to-heart-failure-following-myocardial-infarction
#9
Joshua Strom, Qin M Chen
Nrf2 gene encodes a transcription factor regulating the expression of antioxidant and detoxification genes. We test here whether Nrf2 plays a role for cardiac protection during ischemic injury in an effort to establish Nrf2 as a target for cardiac protection therapies. Cardiac ischemia induced by the left anterior descending (LAD) coronary artery ligation results in myocardial infarction (MI). Young mice surviving MI show minimal signs of heart failure. Mice lacking Nrf2 experience an accelerated progression to heart failure that occurs within 10days following induction of MI...
March 31, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28368454/role-and-regulation-of-micrornas-in-aldosterone-mediated-cardiac-injury-and-dysfunction-in-male-rats
#10
Jana P Ball, Maryam Syed, Rodrigo O Marañon, Michael E Hall, Roshan Kc, Jane F Reckelhoff, Licy L Yanes Cardozo, Damian G Romero
Primary aldosteronism is characterized by excess aldosterone (ALDO) secretion independent of the renin-angiotensin system and accounts for ∼10% of hypertensive patients. Excess ALDO, inappropriate for the salt intake status, causes cardiac hypertrophy, inflammation, fibrosis and hypertension. The molecular mechanisms that trigger the onset and progression of ALDO-mediated cardiac injury are poorly understood. MicroRNAs (miRNAs) are endogenous, small, non-coding RNAs that have been implicated in diverse cardiac pathologies, yet very little is known about their regulation and role in ALDO-mediated cardiac injury...
March 20, 2017: Endocrinology
https://www.readbyqxmd.com/read/28362400/minimally-invasive-transverse-aortic-constriction-in-mice
#11
Aung Moe Zaw, Connor M Williams, Helen K W Law, Billy Kwok Chong Chow
Minimally invasive transverse aortic constriction (MTAC) is a more desirable method for the constriction of the transverse aorta in mice than standard open-chest transverse aortic constriction (TAC). Although transverse aortic constriction is a highly functional method for the induction of high pressure in the left ventricle, it is a more difficult and lengthy procedure due to its use of artificial ventilation with tracheal intubation. TAC is oftentimes also less survivable, as the newer method, MTAC, neither requires the cutting of the ribs and intercostal muscles nor tracheal intubation with a ventilation setup...
March 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28290894/-clinical-and-ultrasonographic-characteristics-of-women-with-gestational-hypertension
#12
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/28290845/-assessment-of-efficiency-of-medicamentous-therapy-in-correction-of-structurally-functional-changes-of-the-cardiac-muscle-at-patients-with-arterial-hypertension-in-combination-with-bronchial-asthma
#13
E I Tarlovskaya, A A Odegova
BACKGROUND: Bronchial asthma (BA) is a serious problem. It was found that the frequency of arterial hypertension (AH) detection in patients with asthma is about 30 %. At patients practically all types of violations of a warm rhythm meet a bronkhoobstruktivny syndrome. Emergence of rather new preparations - If-blockers, opens new opportunities in correction of heart rate (HR) and a cardioprotection at a combination of AH and BA. AIM: To assess therapy diltiazem-retard and ivabradine on structurally functional changes of a cardiac muscle and HR at patients with AH in combination with BA...
June 2016: Kardiologiia
https://www.readbyqxmd.com/read/28272348/zinc-prevents-the-development-of-diabetic-cardiomyopathy-in-db-db-mice
#14
Shudong Wang, Bowei Wang, Yuehui Wang, Qian Tong, Quan Liu, Jian Sun, Yang Zheng, Lu Cai
Diabetic cardiomyopathy (DCM) is highly prevalent in type 2 diabetes (T2DM) patients. Zinc is an important essential trace metal, whose deficiency is associated with various chronic ailments, including vascular diseases. We assessed T2DM B6.BKS(D)-Leprdb/J (db/db) mice fed for six months on a normal diet containing three zinc levels (deficient, adequate, and supplemented), to explore the role of zinc in DCM development and progression. Cardiac function, reflected by ejection fraction, was significantly decreased, along with increased left ventricle mass and heart weight to tibial length ratio, in db/db mice...
March 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28258679/-predictive-parameters-of-occurrence-of-adequate-interventions-in-patients-with-implanted-cardioverter-defibrillators-with-or-without-resynchronisation-therapy-in-primary-prevention-of-sudden-cardiac-death-in-dilated-cardiomyopathy
#15
Jacek Lelakowski, Anna Rydlewska, Maria Lelakowska, Joanna Pudło, Justyna Piekarz
The task of the ICD is to detect ventricular arrhythmias and treatment of its adequate intervention. The task of the CRTD in addition to the above tasks is the treatment of heart failure. AIM: The aim of the study was to assess the predictive parameters of adequate interventions in patients with an ICD and CRTD. MATERIALS AND METHODS: The study consisted of 273 patients (230 M, mean age 65±11 years) with ICD and/or CRTD. The inclusion criteria were: left ventricle ejection fraction (LVEF) ≤ 35%, NYHA class ≥ II, implantation in primary SCD prevention and in case of CRTD additionally LBBB with wide QRS ≥ 120ms...
February 20, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28254494/sodium-restriction-modulates-innate-immunity-and-prevents-cardiac-remodeling-in-a-rat-model-of-metabolic-syndrome
#16
Bernard Jover, Christelle Reynes, Caroline Rugale, Cyril Reboul, Laura Jeanson, Michel Tournier, Anne Dominique Lajoix, Caroline Desmetz
In the view of the relationships between excessive sodium intake, immunity and target organ damage, we hypothesized that reduction in dietary sodium would be beneficial in the prevention of cardiac alterations through a restrained local immunity response in a rat model of metabolic syndrome. Sprague-Dawley rats were fed a 60% fructose diet with either a normal sodium (0.64% NaCl) or a low sodium content (<0.01% NaCl) for 8weeks. After 4weeks, rats were infused or not with angiotensin II (200ng.kg(-1).min(-1), sc) for 4weeks...
February 27, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28253841/identification-of-established-arrhythmogenic-right-ventricular-cardiomyopathy-mutation-in-a-patient-with-the-contrasting-phenotype-of-hypertrophic-cardiomyopathy
#17
Matthew Neil Bainbridge, Lili Li, Yanli Tan, Benjamin Y Cheong, Ali J Marian
BACKGROUND: Advances in the nucleic acid sequencing technologies have ushered in the era of genetic-based "precision medicine". Applications of the genetic discoveries to practice of medicine, however, are hindered by phenotypic variability of the genetic variants. The report illustrates extreme pleiotropic phenotypes associated with an established causal mutation for hereditary cardiomyopathy. CASE PRESENTATION: We report a 61-year old white female who presented with syncope and echocardiographic and cardiac magnetic resonance (CMR) imaging findings consistent with the diagnosis of hypertrophic cardiomyopathy (HCM)...
March 3, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28252427/renal-function-markers-for-long-term-cardiovascular-prediction-in-individuals-after-myocardial-revascularization
#18
E Levitskaya
Goal - assessment of the renal dysfunction impact on the probability of cardiovascular complications development in the long-term period after myocardial revascularization. 90 patients with ischemic heart disease (IHD) and myocardial revascularization indications were involved in the study. All the patients underwent coronary angiography (CAG), by determining the method of myocardial revascularization (MR) - coronary artery bypass grafting or coronary artery stenting. Traditional risk factors and renal dysfunction markers (albuminuria in the range of 30-300 mg/L, β2-microglobulinuria) were revealed in all the patients examined...
January 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28238233/cardiac-fibrosis-in-aortic-stenosis-and-hypertensive-heart-disease-assessed-by-magnetic-resonance-t1-mapping
#19
Florian von Knobelsdorff-Brenkenhoff, Anna-Katharina Mueller, Marcel Prothmann, Pierre Hennig, Matthias A Dieringer, Luisa Schmacht, Andreas Greiser, Jeanette Schulz-Menger
BACKGROUND: Continuous pressure overload may lead to subclinical myocardial tissue changes in patients with hypertensive heart disease (HHD) and aortic stenosis (AS). The study aim was to detect interstitial fibrosis using quantitative cardiovascular magnetic resonance. METHODS: Fifteen patients with HHD (arterial hypertension + septal wall thickness ≥13 mm), 33 with AS (eight mild, 15 moderate, 10 severe), and 60 healthy controls were enrolled. Native T1 maps (modified Look-Locker inversion recovery) were obtained in a basal, mid-ventricular, and apical shortaxis slice of the left ventricle to assess cardiac fibrosis...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28228941/renal-ischemia-reperfusion-induced-cardiac-hypertrophy-in-mice-cardiac-morphological-and-morphometric-characterization
#20
Rogério Cirino-Silva, Fernanda V Kmit, Mayra Trentin-Sonoda, Karina K Nakama, Karine Panico, Juliana M Alvim, Thiago R Dreyer, Herculano Martinho-Silva, Marcela S Carneiro-Ramos
BACKGROUND: Tissue remodeling is usually dependent on the deposition of extracellular matrix that may result in tissue stiffness and impaired myocardium contraction. OBJECTIVES: We had previously demonstrated that renal ischemia/reperfusion (I/R) is able to induce development of cardiac hypertrophy in mice. Therefore, we aimed to characterize renal I/R-induced cardiac hypertrophy. DESIGN: C57BL/6 J mice were subjected to 60 minutes' unilateral renal pedicle occlusion, followed by reperfusion (I/R) for 5, 8, 12 or 15 days...
January 2017: JRSM Cardiovascular Disease
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