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Ventricular hypertrophy

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https://www.readbyqxmd.com/read/29694982/ucp3-ablation-exacerbates-high-salt-induced-cardiac-hypertrophy-and-cardiac-dysfunction
#1
Hongmei Lang, Yang Xiang, Zhihua Ai, Zhiqing You, Xiaolan Jin, Yong Wan, Yongjian Yang
BACKGROUND/AIMS: Excessive salt intake and left ventricular hypertrophy (LVH) are both critical for the development of hypertension and heart failure. The uncoupling protein 3 (UCP3) plays a cardio-protective role in early heart failure development. However, the potential role for UCP3 in salt intake and LVH is unclear. METHODS: UCP3-/- and C57BL/6 mice were placed on either a normal-salt (NS, 0.5%) or a high-salt (HS, 8%) diet for 24 weeks. The cardiac function, endurance capacity, energy expenditure, and mitochondrial functional capacity were measured in each group...
April 20, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29694647/atrial-fibrillation-and-hypertension-state-of-the-art
#2
Soufia Naccache, Mouna Ben Kilani, Rami Tlili, Youssef Ben Ameur, Mohamed Rachid Boujnah
Atrial fibrillation and hypertension are often coexistent. Their incidence increases with advancing age and they are responsible for considerable morbidity and mortality. The relation between theses 2 diseases has long been discussed and determined by clinical studies. Left ventricular hypertrophy and left atrial remodeling during hypertension favor the development of atrial fibrillation. AF during hypertension increases the risk of thromboembolic complications and heart failure. In patients with hypertension, pharmacological treatment may control the cardiac structural changes and retard or prevent the occurrence of atrial fibrillation...
July 2017: La Tunisie Médicale
https://www.readbyqxmd.com/read/29693002/matrix-metalloproteinase-9-is-a-predictive-factor-for-systematic-hypertension-and-heart-dysfunction-in-patients-with-obstructive-sleep-apnea-syndrome
#3
Shuhui Wang, Shisheng Li, Bin Wang, Jiajia Liu, Qinglai Tang
Patients with obstructive sleep apnea syndrome (OSAS) showed higher prevalence in cardiovascular diseases due to aberrant hypoxia and oxidative stress. However, not all OSAS patients end up with cardiovascular disorders, and identification of novel biomarker will be invaluable for differentiating patients at risk. Here we tested the serum matrix metalloproteinase-9 (MMP-9) levels in 47 untreated OSAS patients and found that the MMP-9 level was positively correlated with severity of OSAS, which was consistent with hypoxia degree and duration...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29691147/maternal-high-fat-diet-induces-early-cardiac-hypertrophy-and-alters-cardiac-metabolism-in-sprague-dawley-rat-offspring
#4
K A De Jong, S Barrand, R J Wood-Bradley, D L de Almeida, J K Czeczor, G D Lopaschuk, J A Armitage, S L McGee
BACKGROUND AND AIM: Maternal high fat diets (mHFD) have been associated with an increased offspring cardiovascular risk. Recently we found that the class IIa HDAC-MEF2 pathway regulates gene programs controlling fatty acid oxidation in striated muscle. This same pathway controls hypertrophic responses in the heart. We hypothesized that mHFD is associated with activation of signal controlling class II a HDAC activity and activation of genes involved in fatty acid oxidation and cardiac hypertrophy in offspring...
March 13, 2018: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29686287/association-between-atrial-fibrillation-atrial-enlargement-and-left-ventricular-geometric-remodeling
#5
Yuta Seko, Takao Kato, Tetsuya Haruna, Toshiaki Izumi, Shoichi Miyamoto, Eisaku Nakane, Moriaki Inoko
This study investigated the relationship between atrial fibrillation (AF) and left ventricular (LV) geometric patterns in a hospital-based population in Japan. We retrospectively analyzed 4444 patients who had undergone simultaneous scheduled transthoracic echocardiography (TTE) and electrocardiography during 2013. A total of 430 patients who had findings of previous myocardial infarctions (n = 419) and without the data on body surface area (n = 11) were excluded from the study. We calculated the LV mass index (LVMI) and relative wall (RWT) and categorized 4014 patients into four groups as follows: normal geometry (n = 3046); concentric remodeling (normal LVMI and high RWT, n = 437); concentric hypertrophy (high LVMI and high RWT, n = 149); and eccentric remodeling (high LVMI and normal RWT, n = 382)...
April 23, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29681583/minor-electrocardiographic-st-t-change-and-risk-of-stroke-in-the-general-japanese-population
#6
Joji Ishikawa, Hideo Hirose, Joseph E Schwartz, Shizukiyo Ishikawa
BACKGROUND: Minor ST-T changes are frequently observed on the electrocardiogram (ECG), but the risk of stroke associated with such changes is unclear.Methods and Results:In 10,642 subjects from the Japanese general population, we evaluated minor and major ST-T changes (major ST depression ≥0.1 mV) on ECGs obtained at annual health examinations. At baseline, minor ST-T changes were found in 10.7% of the subjects and 0.5% had major ST-T changes. Minor ST-T changes were associated with older age, female gender, higher systolic blood pressure, presence of hyperlipidemia, and use of antihypertensive medication...
April 20, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29677051/electrocardiographic-predictors-of-atrial-fibrillation-in-nonhypertensive-and-hypertensive-individuals
#7
Arttu O Lehtonen, Ville L Langén, Kimmo Porthan, Mika Kähönen, Markku S Nieminen, Antti M Jula, Teemu J Niiranen
OBJECTIVE: The aim of this study was to compare the predictive value of ECG abnormalities for atrial fibrillation in nonhypertensive versus hypertensive individuals. METHODS: We recorded ECG and measured conventional cardiovascular risk factors in a nationwide population-based sample of 5813 Finns. We divided the participants into nonhypertensive (n = 3148) and hypertensive (n = 2665) individuals and followed the participants for incident atrial fibrillation events...
April 19, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29676452/cardiac-manifestations-in-sickle-cell-disease-varies-with-patient-genotype
#8
Paul Guedeney, François Lionnet, Alexandre Ceccaldi, Katia Stankovic Stojanovic, Ariel Cohen, Sarah Mattioni, Gilles Montalescot, Claude Bachmeyer, Richard Isnard, Jean-Philippe Haymann, Nadjib Hammoudi
Cardiac involvement is well characterized in sickle cell anaemia (SCA) but cardiac features associated with Haemoglobin SC (HbSC) disease are mostly unknown. We compared 60 patients with HbSC disease (median age 31 years, 25 men) to 60 SCA patients and 60 controls matched for age and gender. Left ventricular ejection fraction (LVEF), left ventricle (LV) mass index (LVMi), cardiac index and peak tricuspid regurgitation velocity (TRV) were measured using echocardiography. LV filling pressures were assessed using the ratio of early diastolic transmitral velocity to tissue velocity (E/e' ratio)...
April 20, 2018: British Journal of Haematology
https://www.readbyqxmd.com/read/29674714/mechanisms-of-physiological-and-pathological-cardiac-hypertrophy
#9
REVIEW
Michinari Nakamura, Junichi Sadoshima
Cardiomyocytes exit the cell cycle and become terminally differentiated soon after birth. Therefore, in the adult heart, instead of an increase in cardiomyocyte number, individual cardiomyocytes increase in size, and the heart develops hypertrophy to reduce ventricular wall stress and maintain function and efficiency in response to an increased workload. There are two types of hypertrophy: physiological and pathological. Hypertrophy initially develops as an adaptive response to physiological and pathological stimuli, but pathological hypertrophy generally progresses to heart failure...
April 19, 2018: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29673152/beneficial-effect-of-ocimum-sanctum-linn-against-monocrotaline-induced-pulmonary-hypertension-in-rats
#10
Himanshu Meghwani, Pankaj Prabhakar, Soheb A Mohammed, Pamila Dua, Sandeep Seth, Milind P Hote, Sanjay K Banerjee, Sudheer Arava, Ruma Ray, Subir Kumar Maulik
BACKGROUND: The study was designed to explore any beneficial effect of Ocimum sanctum (Linn) (OS) in experimental pulmonary hypertension (PH) in rats. OS is commonly known as “holy basil” and “Tulsi” and is used in the Indian System of Medicine as antidiabetic, antioxidant, hepatoprotective, adaptogenic, and cardioprotective. METHODS: Monocrotaline (MCT) administration caused development of PH in rats after 28 days and rats were observed for 42 days...
April 17, 2018: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/29672672/mri-and-neuropsychological-correlates-in-african-americans-with-hypertension-and-left-ventricular-hypertrophy
#11
B Waldron-Perrine, J E Kisser, A Brody, E M Haacke, R Dawood, S Millis, P Levy
Background: African Americans (AA) are at high risk for hypertension (HTN) and poor blood pressure (BP) control. Persistently elevated BP contributes to cardiovascular morbidity. White matter hyperintensities (WMH) are a definable magnetic resonance imaging (MRI) marker of cerebrovascular injury linked to impairments in higher level thinking (i.e., executive functions), memory formation and speed of perceptual-motor processing. Methods: This sub-investigation evaluated neuropsychological functioning in association with WMH on brain MRIs in 23 otherwise healthy hypertensive AAs participating in an NIH-funded study of the effects of Vitamin D on BP and cardiac remodeling in AA patients 30-74 years of age with HTN and left ventricular hypertrophy...
April 17, 2018: American Journal of Hypertension
https://www.readbyqxmd.com/read/29670896/short-term-treatment-with-esmolol-reverses-left-ventricular-hypertrophy-in-adult-spontaneously-hypertensive-rats-via-inhibition-of-akt-nf-%C3%AE%C2%BA-b-and-nfatc4
#12
Begoña Quintana-Villamandos, David A Goukassian, Sharath P Sasi, Emilio Delgado-Baeza
Our group has previously demonstrated that short-term treatment with esmolol reduces left ventricular hypertrophy (LVH) in spontaneously hypertensive rats (SHRs). The present study aimed to assess the molecular mechanisms related to this effect. Fourteen-month-old male SHRs were treated intravenously with saline as vehicle (SHR) or esmolol (SHR-E) (300  μ g/kg/min). Age-matched vehicle-treated male Wistar-Kyoto (WKY) rats served as controls. After 48 hours of treatment, the hearts were harvested and left ventricular tissue was separated and processed for Western blot analysis to determine the levels of Akt, NF- κ B, NFATc4, Creb1, Serca2a, Erk1/2, and Sapk/Jnk...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29669786/rearrangement-of-the-protein-phosphatase-1-interactome-during-heart-failure-progression
#13
David Y Chiang, Katherina M Alsina, Eleonora Corradini, Martin Fitzpatrick, Li Ni, Satadru K Lahiri, Julia Reynolds, Xiaolu Pan, Larry Scott, Albert J R Heck, Xander H Wehrens
Background -Heart failure (HF) is a complex disease with a rising prevalence despite advances in treatment. Protein phosphatase 1 (PP1) has long been implicated in HF pathogenesis but its exact role is both unclear and controversial. Most previous studies measured only the PP1 catalytic subunit (PP1c) without investigating its diverse set of interactors, which confer localization and substrate specificity to the holoenzyme. In this study we define the PP1 interactome in cardiac tissue and test the hypothesis that this interactome becomes rearranged during HF progression at the level of specific PP1c interactors...
April 18, 2018: Circulation
https://www.readbyqxmd.com/read/29669326/atorvastatin-attenuates-myocardial-hypertrophy-in-spontaneously-hypertensive-rats-via-the-c-ebp%C3%AE-pgc-1%C3%AE-ucp3-pathway
#14
Yintao Chen, Ye Chang, Naijin Zhang, Xiaofan Guo, Guozhe Sun, Yingxian Sun
BACKGROUND/AIMS: Many clinical and experimental studies have shown that treatment with statins could prevent myocardial hypertrophy and remodeling induced by hypertension and myocardial infarction. But the molecular mechanism was not clear. We aimed to investigate the beneficial effects of atorvastatin on hypertension-induced myocardial hypertrophy and remodeling in spontaneously hypertensive rats (SHR) with the hope of revealing other potential mechanisms or target pathways to interpret the pleiotropic effects of atorvastatin on myocardial hypertrophy...
April 13, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29668883/deletion-of-delta-like-1-homologue-accelerates-fibroblast-myofibroblast-differentiation-and-induces-myocardial-fibrosis
#15
Patricia Rodriguez, Yassine Sassi, Luca Troncone, Ludovic Benard, Kiyotake Ishikawa, Ronald E Gordon, Santiago Lamas, Jorge Laborda, Roger J Hajjar, Djamel Lebeche
Aims: Myocardial fibrosis is associated with profound changes in ventricular architecture and geometry, resulting in diminished cardiac function. There is currently no information on the role of the delta-like homologue 1 (Dlk1) in the regulation of the fibrotic response. Here, we investigated whether Dlk1 is involved in cardiac fibroblast-to-myofibroblast differentiation and regulates myocardial fibrosis and explored the molecular mechanism underpinning its effects in this process. Methods and results: Using Dlk1-knockout mice and adenoviral gene delivery, we demonstrate that overexpression of Dlk1 in cardio-fibroblasts resulted in inhibition of fibroblast proliferation and differentiation into myofibroblasts...
April 13, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29666426/cardiac-hypertrophy-limits-infarct-expansion-after-myocardial-infarction-in-mice
#16
Siiri E Iismaa, Ming Li, Scott Kesteven, Jianxin Wu, Andrea Y Chan, Sara R Holman, John W Calvert, Ahtesham Ul Haq, Amy M Nicks, Nawazish Naqvi, Ahsan Husain, Michael P Feneley, Robert M Graham
We have previously demonstrated that adult transgenic C57BL/6J mice with CM-restricted overexpression of the dominant negative W v mutant protein (dn-c-kit-Tg) respond to pressure overload with robust cardiomyocyte (CM) cell cycle entry. Here, we tested if outcomes after myocardial infarction (MI) due to coronary artery ligation are improved in this transgenic model. Compared to non-transgenic littermates (NTLs), adult male dn-c-kit-Tg mice displayed CM hypertrophy and concentric left ventricular (LV) hypertrophy in the absence of an increase in workload...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29663526/racial-ethnic-differences-in-the-prognostic-utility-of-left-ventricular-mass-index-for-incident-cardiovascular-disease
#17
Emmanuel Akintoye, Karim Mahmoud, Mohamed Shokr, Aubin Sandio, Sagar Mallikethi-Reddy, Muhammad Sheikh, Oluwole Adegbala, Alexander Egbe, Alexandros Briasoulis, Luis Afonso
BACKGROUND: Evidence exists for racial/ethnic differences in left ventricular mass index (LVMI). How this translates to future cardiovascular disease (CVD) events is unknown. HYPOTHESIS: The impact of racial/ethnic differences in LVMI on incident cardiovascular outcomes could have potential implications for the optimization of risk stratification strategies. METHODS: Using the prospectively collected database of the Multi-Ethnic Study of Atherosclerosis (MESA) involving 4 racial/ethnic groups (non-Hispanic Whites, Chinese, Blacks, and Hispanics) free of CVD at baseline, we assessed for racial/ethnic differences in the relationship between LVMI and incident CVD using a Cox model...
April 17, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29663506/new-classification-of-geometric-ventricular-patterns-in-severe-aortic-stenosis-could-it-be-clinically-useful
#18
Concetta Di Nora, Eugenio Cervesato, Iulian Cosei, Andreea Ravasel, Bogdan A Popescu, Concetta Zito, Scipione Carerj, Francesco Antonini-Canterin, Andreea C Popescu
BACKGROUND: In severe aortic stenosis, different left ventricle (LV) remodeling patterns as a response to pressure overload have distinct hemodynamic profiles, cardiac function, and outcomes. The most common classification considers LV relative wall thickness and LV mass index to create 4 different groups. A new classification including also end-diastolic volume index has been recently proposed. AIM: To describe the prevalence of the newly identified remodeling patterns in patients with severe aortic stenosis and to evaluate their clinical relevance according to symptoms...
April 16, 2018: Echocardiography
https://www.readbyqxmd.com/read/29661945/cigarette-smoking-and-incident-heart-failure-insights-from-the-jackson-heart-study
#19
Daisuke Kamimura, Loretta R Cain, Robert J Mentz, Wendy B White, Michael J Blaha, Andrew P DeFilippis, Ervin R Fox, Carlos J Rodriguez, Rachel J Keith, Emelia J Benjamin, Javed Butler, Aruni Bhatnagar, Rose M Robertson, Michael D Winniford, Adolfo Correa, Michael E Hall
Background -Cigarette smoking has been linked with several factors associated with cardiac dysfunction. We hypothesized that cigarette smoking is associated with left ventricular (LV) structure and function, and incident heart failure (HF) hospitalization. Methods -We investigated 4129 (never smoker n=2884, current smoker n=503, and former smoker n=742) black participants (mean age, 54 years; 63% women) without a history of HF or coronary heart disease at baseline in the Jackson Heart Study. We examined the relationships between cigarette smoking and LV structure and function by using cardiac magnetic resonance imaging among 1092 participants, cigarette smoking and brain natriuretic peptide levels among 3325 participants, and incident HF hospitalization among 3633 participants with complete data...
April 16, 2018: Circulation
https://www.readbyqxmd.com/read/29660902/effect-of-rho-kinase-inhibitor-fasudil-on-the-expression-et-1-and-no-in-rats-with-hypoxic-pulmonary-hypertension
#20
Xing-Zhen Sun, Shu-Yan Li, Xiang-Yang Tian, Ze Hong, Jia-Xin Li
OBJECTIVE: This study aims to study the effect of Rho kinase inhibitor fasudil on the expression endothelin-1 (ET-1) and nitric oxide (NO) in rats with hypoxic pulmonary hypertension (HPH). METHODS: Twenty-four male SD rats were randomly divided into three groups: control group, model group (HPH group) and HPH+fasudil group. The rat HPH model was established by intermittent hypoxia (IH) at atmospheric pressure. Mean pulmonary artery pressure (mPAP), right ventricular hypertrophy index (RVHI), ET-1 and NO levels, and pulmonary vascular structural changes were observed in all groups...
April 12, 2018: Clinical Hemorheology and Microcirculation
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