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https://www.readbyqxmd.com/read/28339908/obesity-associated-cardiac-pathogenesis-in-broiler-breeder-hens-pathological-adaption-of-cardiac-hypertrophy1-2
#1
C Y Chen, H Y Lin, Y W Chen, Y J Ko, Y J Liu, Y H Chen, R L Walzem, S E Chen
Broiler hens consuming feed to appetite (ad libitum; AL) show increased mortality. Feed restriction (R) typically improves reproductive performance and livability of hens. Rapidly growing broilers can exhibit increased mortality due to cardiac insufficiency but it is unknown whether the increased mortality of non-R broiler hens is also due to cardiac compromise. To assess cardiac growth and physiology in fully mature birds, 45-week-old hens were either continued on R rations or assigned to AL feeding for 7 or 21 days...
March 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28339731/obesity-associated-cardiac-pathogenesis-in-broiler-breeder-hens-development-of-metabolic-cardiomyopathy2-3
#2
C Y Chen, Y F Huang, Y J Ko, Y J Liu, Y H Chen, R L Walzem, S E Chen
Feed intake is typically restricted (R) in broiler hens to avoid obesity and improve egg production and livability. To determine whether improved heart health contributes to improved livability, fully adult 45-week-old R hens were allowed to consume feed to appetite (ad libitum; AL) up to 10 wk (70 d). Mortality, contractile functions, and morphology at 70 d, and measurements of cardiac hypertrophic remodeling at 7 d and 21 d were made and compared between R and AL hens. Outcomes for cardiac electrophysiology and mortality, reported separately, found increased mortality in AL hens in association with cardiac pathological hypertrophy and contractile dysfunction...
February 22, 2017: Poultry Science
https://www.readbyqxmd.com/read/28336438/klf15-protects-against-isoproterenol-induced-cardiac-hypertrophy-via-regulation-of-cell-death-and-inhibition-of-akt-mtor-signaling
#3
Li Gao, Yudong Guo, Xiaofeng Liu, Yongjian Du
Increasing evidence indicate that the Krüppel-like factor KLF15, a member of Cys2/His2 zinc-finger DNA-binding proteins, attenuates cardiac hypertrophy. However, the role of KLF15 in cardiovascular system is largely unknown and the exact molecular mechanism of its protective function is not fully elucidated. In the present study, we established a mouse model of cardiac hypertrophy and found that KLF15 expression was down-regulated in hypertrophic hearts. To evaluate the roles of KLF15 in cardiac hypertrophy, we generated transgenic mice overexpressing KLF15 of KLF15 knockdown mice and subsequently induced cardiac hypertrophy...
March 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28329292/surgical-septal-myectomy-or-alcohol-septal-ablation-which-approach-offers-better-outcomes-for-patients-with-hypertrophic-obstructive-cardiomyopathy
#4
Shi Sum Poon, Mark Field, Dhiraj Gupta, Duke Cameron
A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was whether surgical septal myectomy (SM) is more beneficial than alcohol septal ablation (ASA) in patients with hypertrophic obstructive cardiomyopathy. Altogether 218 articles were found using the reported search, of which 15 studies represented the best evidence to answer the clinical question. There were 14 observational studies and 1 meta-analysis study. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these articles are tabulated...
February 28, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329285/upright-treadmill-vs-semi-supine-bicycle-exercise-echocardiography-to-provoke-obstruction-in-symptomatic-hypertrophic-cardiomyopathy-a-pilot-study
#5
Patricia Reant, Maxence Dufour, Jerome Peyrou, Amelie Reynaud, Caroline Rooryck, Marina Dijos, Cecile Vincent, Claire Cornolle, Raymond Roudaut, Stephane Lafitte
Aims: Recent findings regarding hypertrophic cardiomyopathy (HCM) haemodynamics emphasized the relationship between symptoms, left ventricular outflow tract obstruction (LVOTO), and the preload condition as the venous return level. As various types of exercises have different effects on peripheral vascular beds, this study sought to compare upright treadmill exercise echocardiography (EE) to semi-supine bicycle EE in maximum provoked LVOTO in HCM patients. Methods and results: Semi-supine bicycle and upright treadmill EE were prospectively performed in HCM patients with New York Heart Association functional Class II...
February 17, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28323875/the-clinical-features-outcomes-and-genetic-characteristics-of-hypertrophic-cardiomyopathy-patients-with-severe-right-ventricular-hypertrophy
#6
Xiying Guo, Chaomei Fan, Lei Tian, Yanling Liu, Hongyue Wang, Shihua Zhao, Fujian Duan, Xiuling Zhang, Xing Zhao, Fengqi Wang, Hongguang Zhu, Aiqing Lin, Xia Wu, Yishi Li
INTRODUCTION: Severe right ventricular hypertrophy (SRVH) is a rare phenotype in hypertrophic cardiomyopathy (HCM) for which limited information is available. This study was undertaken to investigate the clinical, prognostic and genetic characteristics of HCM patients with SRVH. METHODS: HCM with SRVH was defined as HCM with a maximum right ventricular wall thickness ≥10 mm. Whole-genome sequencing (WGS) was performed in HCM patients with SRVH. Multivariate Cox proportional hazards regression models were used to identify risk factors for cardiac death and events in HCM with SRVH...
2017: PloS One
https://www.readbyqxmd.com/read/28321644/vinpocetine-attenuates-pathological-cardiac-remodeling-by-inhibiting-cardiac-hypertrophy-and-fibrosis
#7
Mei-Ping Wu, Yi-Shuai Zhang, Xiangbin Xu, Qian Zhou, Jian-Dong Li, Chen Yan
PURPOSE: Pathological cardiac remodeling, characterized by cardiac hypertrophy and fibrosis, is a pathological feature of many cardiac disorders that leads to heart failure and cardiac arrest. Vinpocetine, a derivative of the alkaloid vincamine, has been used for enhancing cerebral blood flow to treat cognitive impairment. However, its role in pathological cardiac remodeling remains unknown. The aim of this study is to examine the effect of vinpocetine on pathological cardiac remodeling induced by chronic stimulation with angiotensin II (Ang II)...
March 20, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28320395/vasoproliferative-process-resembling-pulmonary-capillary-hemangiomatosis-in-a-cat
#8
J A Jaffey, K J Williams, I Masseau, M Krueger, C Reinero
BACKGROUND: Pulmonary capillary hemangiomatosis is a rare, vascular obstructive disorder that uniformly causes pulmonary arterial hypertension. Clinically, pulmonary capillary hemangiomatosis is indistinguishable from primary pulmonary arterial hypertension and histology is required for definitive diagnosis. The distinctive histologic feature of pulmonary capillary hemangiomatosis is non-malignant extensive proliferation of capillaries in the alveolar septae. Vasodilator treatment of humans with primary arterial hypertension due to pulmonary capillary hemangiomatosis can result in fatal acute pulmonary edema...
March 20, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28317480/novel-insights-into-complex-cardiovascular-pathologies-using-4d-flow-analysis-by-cardiovascular-magnetic-resonance-imaging
#9
Adam James Lewandowski, Betty Raman, Rajarshi Banerjee, Matteo Milanesi
BACKGROUND: It is essential that we are able to assess variations in blood flow in order to fully understand cardiovascular function in disease pathologies and for identification of individuals at long-term risk of cardiovascular disease development. Qualitative and quantitative assessments of blood flow by imaging modalities have been limited, and much of the accurate quantification has relied on invasive measures. METHODS: This review discusses how four-dimensional velocity cardiovascular magnetic resonance (4D flow CMR) offers increasing potential for the non-invasive assessment of blood flow in the heart and major blood vessels such as the aorta...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28316060/hotair-functions-as-a-competing-endogenous-rna-to-regulate-pten-expression-by-inhibiting-mir-19-in-cardiac-hypertrophy
#10
Yanjun Lai, Shuai He, Liming Ma, Hong Lin, Biyun Ren, Jing Ma, Xinyu Zhu, Shifang Zhuang
Sustained cardiac hypertrophy (CH) is related to a variety of physiological as well as pathological stimuli and eventually increases the risk of heart failure. HOTAIR has been identified as a competing endogenous RNA in multiple human biological processes. Whether lncRNA-HOTAIR is involved in the progress of CH and how it works still remain unknown. Herein, we found that HOTAIR was down-regulated, while miR-19 was up-regulated in both heart tissues from TAC-operated mice in vivo and cultural cardiomyocytes treated with Ang-II in vitro by real-time PCR...
March 18, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28315668/cmybp-c-was-decreased-via-klhl3-mediated-proteasomal-degradation-in-congenital-heart-diseases
#11
Leitong Wang, Guangrui Lai, Guoming Chu, Xiaoyan Liang, Yanyan Zhao
Cardiac myosin binding protein C (cMyBP-C) is a cardiac structural and regulatory protein; mutations of cMyBP-C are frequently associated with hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM). Cardiac special transcription factors may regulate the expression of cMyBP-C. However, the role of cMyBP-C in congenital heart diseases (CHD) remains poorly understood. In the current study, western blotting and the MRM approach showed that cMyBP-C expression was significantly reduced in fetuses with CHD compared to those without...
March 15, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28315570/tp-e-interval-and-tp-e-qtc-ratio-as-novel-surrogate-markers-for-prediction-of-ventricular-arrhythmic-events-in-hypertrophic-cardiomyopathy
#12
Mehmet Kadri Akboğa, Kevser Gülcihan Balcı, Samet Yılmaz, Selahattin Aydın, Çağrı Yayla, Ahmet Göktuğ Ertem, Sefa Ünal, Mustafa Mücahit Balcı, Yücel Balbay, Dursun Aras, Serkan Topaloğlu
OBJECTIVE: Hypertrophic cardiomyopathy (HCM) as a common genetic heart disease characterized by ventricular hypertrophy and myocardial fibrosis is significantly associated with a higher risk of fatal ventricular arrhythmic events (VAEs). We aimed to assess the interval between the peak and the end of the electrocardiographic T wave (Tp-e) and Tp-e/corrected QT (QTc) ratio as candidate markers of ventricular arrhythmias in patients with HCM. METHODS: In this single-center, prospective study, a total of 66 patients with HCM and 88 controls were enrolled...
March 9, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28315121/untangling-the-biology-of-genetic-cardiomyopathies-with-pluripotent-stem-cell-disease-models
#13
REVIEW
Jan W Buikema, Sean M Wu
PURPOSE OF REVIEW: Recently, the discovery of strategies to reprogram somatic cells into induced pluripotent stem (iPS) cells has led to a major paradigm change in developmental and stem cell biology. The application of iPS cells and their cardiac progeny has opened novel directions to study cardiomyopathies at a cellular and molecular level. This review discusses approaches currently undertaken to unravel known inherited cardiomyopathies in a dish. RECENT FINDINGS: With improved efficiency for mutation correction by genome editing, human iPS cells have now provided a platform to untangle the biology of cardiomyopathies...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28306208/evaluation-of-myocardial-microcirculation-using-intravoxel-incoherent-motion-imaging
#14
Anna Mou, Chen Zhang, Mengying Li, Fengqiang Jin, Qingwei Song, Ailian Liu, Zhiyong Li
PURPOSE: To explore whether cardiac magnetic resonance-intravoxel incoherent motion imaging (MR-IVIM) is feasible for the clinical evaluation of myocardial microcirculation. MATERIALS AND METHODS: The study included 30 patients (with hypertrophic cardiomyopathy, diabetes mellitus, hypertension, or combined diabetes and hypertension) and 34 healthy volunteers. MR-IVIM with a maximum gradient strength of 50 mT/m was performed on the left ventricular short axis (apex, middle, and base), using multiple b values (0-500 s/mm(2) ) on a 3...
March 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28301315/time-and-age-dependent-decrease-of-nt-probnp-after-septal-myectomy-in-hypertrophic-obstructive-cardiomyopathy
#15
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/28299467/cardiomyocyte-ogt-limits-ventricular-dysfunction-in-mice-following-pressure-overload-without-affecting-hypertrophy
#16
Sujith Dassanayaka, Robert E Brainard, Lewis J Watson, Bethany W Long, Kenneth R Brittian, Angelica M DeMartino, Allison L Aird, Anna M Gumpert, Timothy N Audam, Peter J Kilfoil, Senthilkumar Muthusamy, Tariq Hamid, Sumanth D Prabhu, Steven P Jones
The myocardial response to pressure overload involves coordination of multiple transcriptional, posttranscriptional, and metabolic cues. The previous studies show that one such metabolic cue, O-GlcNAc, is elevated in the pressure-overloaded heart, and the increase in O-GlcNAcylation is required for cardiomyocyte hypertrophy in vitro. Yet, it is not clear whether and how O-GlcNAcylation participates in the hypertrophic response in vivo. Here, we addressed this question using patient samples and a preclinical model of heart failure...
May 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28298286/echo-parameters-for-differential-diagnosis-in-cardiac-amyloidosis-a-head-to-head-comparison-of-deformation-and-nondeformation-parameters
#17
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/28296734/genetic-anticipation-in-a-special-form-of-hypertrophic-cardiomyopathy-with-sudden-cardiac-death-in-a-family-with-74-members-across-5-generations
#18
Xiying Guo, Chaomei Fan, Yanping Wang, Miao Wang, Chi Cai, Yinjian Yang, Shihua Zhao, Fujian Duan, Yishi Li
Hypertrophic cardiomyopathy (HCM) is the most common heritable heart disease. The genetic anticipation of HCM and its associated etiology, sudden cardiac death (SCD), remains unclear. The aim of this study was to investigate the mechanism underlying the genetic anticipation of HCM and associated SCD.An HCM family including 5 generations and 74 members was studied. Two-dimensional echocardiography was performed to diagnose HCM. The age of onset of HCM was defined as the age at first diagnosis according to hospital records...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28295792/biventricular-impact-of-mild-to-moderate-pulmonary-valve-stenosis-in-fetal-life
#19
L Guirado, F Crispi, N Masoller, M Bennasar, E Marimon, J Carretero, E Gratacós, J M Martínez, M K Friedberg, O Gómez
OBJECTIVES: to define the pattern of fetal echocardiographic changes associated with isolated pulmonary valve stenosis (PS) and to correlate the echocardiographic findings with the neonatal outcome and the need of postnatal pulmonary valvuloplasty within the first 12 months of life. METHODS: a prospective cohort study was designed on 16 fetuses with isolated PS and 48 controls matched by gestational age at scan (+/- 2 weeks). Fetal standard ultrasound and comprehensive echocardiography, which included cardiovascular morphometric parameters, systolic and diastolic functional and timing-measurements, were performed in all cases...
March 10, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28295648/echocardiographic-assessment-of-right-ventricular-size-and-function-in-cats-with-hypertrophic-cardiomyopathy
#20
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
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