keyword
MENU ▼
Read by QxMD icon Read
search

structurally normal heart

keyword
https://www.readbyqxmd.com/read/28630914/deregulated-ca-2-cycling-underlies-the-development-of-arrhythmia-and-heart-disease-due-to-mutant-obscurin
#1
Li-Yen R Hu, Maegen A Ackermann, Peter A Hecker, Benjamin L Prosser, Brendan King, Kelly A O'Connell, Alyssa Grogan, Logan C Meyer, Christopher E Berndsen, Nathan T Wright, W Jonathan Lederer, Aikaterini Kontrogianni-Konstantopoulos
Obscurins are cytoskeletal proteins with structural and regulatory roles encoded by OBSCN. Mutations in OBSCN are associated with the development of hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM). Specifically, the R4344Q mutation present in immunoglobulin domain 58 (Ig58) was the first to be linked with the development of HCM. To assess the effects of R4344Q in vivo, we generated the respective knock-in mouse model. Mutant obscurins are expressed and incorporated normally into sarcomeres...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28630342/autoantibody-profiling-on-a-plasmonic-nano-gold-chip-for-the-early-detection-of-hypertensive-heart-disease
#2
Xiaoyang Li, Tatiana Kuznetsova, Nicholas Cauwenberghs, Matthew Wheeler, Holden Maecker, Joseph C Wu, Francois Haddad, Hongjie Dai
The role of autoimmunity in cardiovascular (CV) diseases has been increasingly recognized. Autoimmunity is most commonly examined by the levels of circulating autoantibodies in clinical practices. Measurement of autoantibodies remains, however, challenging because of the deficiency of reproducible, sensitive, and standardized assays. The lack of multiplexed assays also limits the potential to identify a CV-specific autoantibody profile. To overcome these challenges, we developed a nanotechnology-based plasmonic gold chip for autoantibody profiling...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28628053/heart-rate-and-blood-pressure-responses-to-gear-weight-under-a-controlled-workload
#3
Cassandra C Derella, Kristin R Aichele, Joyann E Oakman, Christina M Cromwell, Jessica A Hill, Lauren N Chavis, Avery N Perez, Allyson K Getty, Tia R Wisdo, Deborah L Feairheller
OBJECTIVE: To compare the effects of personal protective equipment (PPE) weight on blood pressure (BP) and heart rate (HR), between volunteer firefighters (FF) and athletes. METHODS: Athletes and FF were matched by body size and came to the lab twice for two treadmill tests. The "Regular" test was completed in normal fitness clothing, and PPE test was completed in full structural PPE with monitoring of HR assessment every minute and BP each stage. RESULTS: In the FF cohort, all submaximal HR and BP levels were different...
April 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28627346/-study-on-rac1-mapk-erk-pathway-mediated-mechanism-and-role-in-rats-with-ventilator-induced-lung-injury
#4
Guanghua Tao, Linghui Pan, Ren Jing, Fei Lin, Huijun Dai, Wanyun Ge
OBJECTIVE: To investigate the role of Ras-related C3 botulinum toxin substrate 1/mitogen-activated protein kinase/extracellular signal-regulated kinase (Rac1/MAPK/ERK) signal pathway in rats with ventilator induced lung injury (VILI) and its mechanism. METHODS: Thirty Sprague-Dawley (SD) rats were randomly divided into spontaneous respiration group, normal tidal volume (VT) group and high VT group with 10 rats in each group. The rats in spontaneous respiration group were kept their spontaneous breathing...
March 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28627028/common-findings-in-late-gestation-fetal-echocardiography
#5
Lauren Tague, Mary T Donofrio, Amanda Fulgium, Robert McCarter, Catherine Limperopoulos, David N Schidlow
OBJECTIVES: Fetal echocardiography provides detailed information about cardiac structure and function in utero. Limited information is available regarding normal findings late in pregnancy. We therefore sought to identify and describe common cardiac findings in late gestation. METHODS: Fetuses with structurally normal hearts were identified in mid gestation within a subset of pregnant women in a prospective study. The atrioventricular valves, right and left atria, aortic isthmus and ductus arteriosus dimensions and flow abnormalities, aneurysm of the septum primum, and presence and grade of tricuspid regurgitation were assessed throughout pregnancy...
June 19, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28611124/endothelial-senescence-contributes-to-heart-failure-with-preserved-ejection-fraction-in-an-aging-mouse-model
#6
Andreas B Gevaert, Hadis Shakeri, Arthur J Leloup, Cor E Van Hove, Guido R Y De Meyer, Christiaan J Vrints, Katrien Lemmens, Emeline M Van Craenenbroeck
BACKGROUND: Because of global aging, the prevalence of heart failure with preserved ejection fraction (HFpEF) continues to rise. Although HFpEF pathophysiology remains incompletely understood, endothelial inflammation is stated to play a central role. Cellular senescence is a process of cellular growth arrest linked with aging and inflammation. We used mice with accelerated aging to investigate the role of cellular senescence in HFpEF development. METHODS AND RESULTS: Senescence-accelerated mice (SAM, n=18) and control mice with normal senescence (n=15) were fed normal chow or a high-fat, high-salt diet (WD)...
June 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28606026/subclinical-myocardial-disease-by-cardiac-magnetic-resonance-imaging-and-spectroscopy-in-healthy-hiv-hepatitis-c-virus-coinfected-persons
#7
Kara W Chew, Chia-Ying Liu, Bharath Ambale-Venkatesh, Diana Liao, Tamara B Horwich, João A C Lima, David A Bluemke, J Paul Finn, Adeel A Butt, Judith S Currier
Objective The contribution of hepatitis C virus (HCV) infection to the risk of heart failure in human immunodeficiency virus (HIV)-coinfected persons is unknown. The objective was to characterize cardiac function and morphology in HIV-treated coinfected persons. Methods In a cross-sectional study, HIV-infected patients virologically suppressed on antiretroviral therapy without known cardiovascular disease or diabetes mellitus underwent cardiac magnetic resonance imaging and spectroscopy for measures of cardiac function, myocardial fibrosis, and steatosis...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28599828/a-doppler-echocardiographic-study-of-the-myocardial-inotropic-response-to-peak-semisupine-exercise-in-healthy-children-development-of-a-simplified-index-of%C3%A2-myocardial%C3%A2-reserve
#8
Anita T Cote, D Kathryn Duff, Carolina A Escudero, Astrid M De Souza, Lindsey D Williams, Raman Gill, M Terri Zadorsky, Kevin C Harris, James E Potts, George G S Sandor
BACKGROUND: Stress echocardiography has been advocated for the detection of abnormal myocardial function and unmasking diminished myocardial reserve in pediatric patients. The aim of this study was to create a simplified index of myocardial reserve, derived from the myocardial inotropic response to peak semisupine exercise in healthy children, and illustrate its applicability in a sample of pediatric oncology patients. METHODS: In this prospective analysis, children (7-18 years of age) with normal cardiac structure and function performed semisupine stress echocardiography to volitional fatigue...
June 6, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28591770/inferolateral-early-repolarization-among-non-ischaemic-sudden-cardiac-death-victims
#9
Lauri T A Holmström, Mira A Haukilahti, Jani T Tikkanen, Aapo L Aro, Tuomas V Kenttä, Marja-Leena Kortelainen, Heikki V Huikuri, Matti J Junttila
Aim: Inferolateral early repolarization (ER) has been associated with an increased risk of sudden cardiac death (SCD). However, this association is thought to be mainly due to ischaemic SCD. The association of ER and non-ischaemic SCD has not been studied. The aim was to evaluate whether inferolateral ER is associated with non-ischaemic SCD. Methods and results: Study population consists of 275 consecutive victims of non-ischaemic SCD with 12-lead ECG and control group of general population cohort with 10 864 subjects...
June 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28581914/technical-skills-training-for-veterinary-students-a-comparison-of-simulators-and-video-for-teaching-standardized-cardiac-dissection
#10
Rachel E Allavena, Andrea B Schaffer-White, Hanna Long, John I Alawneh
The goal of the study was to evaluate alternative student-centered approaches that could replace autopsy sessions and live demonstration, and to explore refinements in assessment procedures for standardized cardiac dissection. Simulators and videos were identified as feasible, economical, student-centered teaching methods for technical skills training in medical contexts, and a direct comparison was undertaken. A low-fidelity anatomically correct simulator approximately the size of a horse's heart with embedded dissection pathways was constructed and used with a series of laminated photographs of standardized cardiac dissection...
June 5, 2017: Journal of Veterinary Medical Education
https://www.readbyqxmd.com/read/28579111/clinical-features-and-prognosis-of-infective-endocarditis-in-children-insights-from-a-tunisian-multicentre-registry
#11
Walid Jomaa, Imen Ben Ali, Dorra Abid, Samia Hajri Ernez, Leila Abid, Faten Triki, Samir Kammoun, Anissa Gharbi, Oussama Ben Rejeb, Abdallah Mahdhaoui, Gouider Jeridi, Mohamed A Azaiez, Aymen El Hraiech, Khaldoun Ben Hamda, Faouzi Maatouk
BACKGROUND: Infective endocarditis (IE) is a rare condition in the paediatric setting. No data on the epidemiology and prognosis of IE in children are available from North African countries. AIM: To investigate the epidemiological profile and prognosis of IE in children in Tunisia. METHODS: All patients aged≤18 years presenting with IE in three Tunisian tertiary care centres between January 1997 and September 2013 were included. Clinical features and 30-day and 6-month mortality rates were studied...
May 31, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28577664/feasibility-of-exercise-stress-echocardiography-and-myocardial-response-in-patients-with-repaired-congenital-heart-disease
#12
Babar S Hasan, Fatima I Lunze, Najveen Alvi, Keri M Shafer, Jonathan Rhodes
BACKGROUND: Exercise stress echocardiography (ESE) can unmask ventricular dysfunction in asymptomatic patients with congenital heart disease (CHD), but its acquisition and interpretation is often challenging, and the method has not been validated in CHD. This study aimed to evaluate the feasibility of ESE using Doppler imaging and to assess myocardial response to exercise in patients with biventricular (BiV) and univentricular (UniV) circulation after CHD repair. METHODS: In this single-center prospective study, we recruited 55 participants (17 females), median age 14 years (8-22 years)...
June 2017: American Heart Journal
https://www.readbyqxmd.com/read/28574580/echographic-features-and-perinatal-outcomes-in-fetuses-with-congenital-absence-of-ductus-venosus
#13
Raquel Garcia-Delgado, Raquel Garcia-Rodriguez, Azahar Romero Requejo, Marta Armas Roca, Luciana Obreros Zegarra, Margarita Medina Castellano, Jose A Garcia Hernandez
The purpose of this study was to describe the echographic features and perinatal outcomes of fetuses with absence of ductus venosus (ADV) MATERIAL AND METHODS: Retrospective review of 10 cases with ADV diagnosed by prenatal ultrasonography between January 2014 and February 2016 at a single referral center. Prenatal findings, umbilical shunting type, perinatal outcomes, and autopsy reports were reviewed RESULTS: A total of 11 491 fetuses underwent a first and second trimester screening during the study period...
June 2, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28570536/isolation-of-intermediate-filament-proteins-from-multiple-mouse-tissues-to-study-aging-associated-post-translational-modifications
#14
Rachel A Battaglia, Parijat Kabiraj, Helen H Willcockson, Melinda Lian, Natasha T Snider
Intermediate filaments (IFs), together with actin filaments and microtubules, form the cytoskeleton - a critical structural element of every cell. Normal functioning IFs provide cells with mechanical and stress resilience, while a dysfunctional IF cytoskeleton compromises cellular health and has been associated with many human diseases. Post-translational modifications (PTMs) critically regulate IF dynamics in response to physiological changes and under stress conditions. Therefore, the ability to monitor changes in the PTM signature of IFs can contribute to a better functional understanding, and ultimately conditioning, of the IF system as a stress responder during cellular injury...
May 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28567491/pathophysiology-of-ventricular-tachyarrhythmias-from-automaticity-to-reentry
#15
REVIEW
Andres Enriquez, David S Frankel, Adrian Baranchuk
Ventricular arrhythmias are a heterogeneous group of arrhythmias and may arise in patients with cardiomyopathy or structurally normal hearts. The electrophysiologic mechanisms responsible for the initiation and maintenance of ventricular tachycardia include enhanced automaticity, triggered activity, and reentry. Differentiating between these three mechanisms can be challenging and usually requires an invasive electrophysiology study. Establishing the underlying mechanism in a particular patient is helpful to define the optimal therapeutic approach, including the selection of pharmacologic agents or delineation of an ablation strategy...
May 31, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28566800/serum-soluble-st2-and-diastolic-dysfunction-in-hypertensive-patients
#16
Anca Daniela Farcaş, Florin Petru Anton, Cerasela Mihaela Goidescu, Iulia Laura Gavrilă, Luminiţa Animarie Vida-Simiti, Mirela Anca Stoia
BACKGROUND: Echocardiographic evaluation of left ventricular (LV) structural and functional alterations in hypertension has some limitations, potentially overcome by using biomarkers. ST2, a prognostic biomarker for heart failure and myocardial infarction patients, was less studied in hypertension. AIM: To analyze the relationship between serum ST2 levels and diastolic dysfunction (DD) in hypertension. METHOD: We enrolled 88 hypertensive outpatients (average age 65 years, 69...
2017: Disease Markers
https://www.readbyqxmd.com/read/28566490/n-methyl-d-asparate-receptors-activation-down-regulated-transient-outward-potassium-and-l-type-calcium-current-in-rat-models-of-depression
#17
Xin Liu, Shaobo Shi, Hongjie Yang, Chuan Qu, Yuting Chen, Jinjun Liang, Bo Yang
Objective Major depression is an important clinical factor in ventricular arrhythmia. Patients diagnosed with major depression overexpress N-methyl-d-aspartate receptors (NMDARs). Previous studies found that chronic NMDAR activation increases susceptibility to ventricular arrhythmias. We aimed to explore the mechanisms by which NMDAR activation may increase susceptibility to ventricular arrhythmias. Methods Male rats were randomly assigned to either normal environments as control (CTL) group or 4weeks of chronic mild stress(CMS) to produce a major depression disorder (MDD) model group...
May 31, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28562571/hemodynamic-instability-after-pulmonary-veins-isolation-in-a-patient-with-dual-chamber-pacemaker-the-phantom-injury-of-the-ventricular-lead
#18
Márcio Galindo Kiuchi, Guilherme Miglioli Lobato, Shaojie Chen
INTRODUCTION: The standard treatment of sinus node dysfunction (SND) is the pacemaker implantation, and the ideal methodology for the management of atrial fibrillation (AF) is rhythm control, but this is sometimes very hard to accomplish. For such actions, complete isolation of all pulmonary veins (PVI) is currently widely accepted as the best endpoint. CASE PRESENTATION: In this case, we report a female patient, 81 years old, with controlled hypertension, without coronary artery disease, bearer of bilateral knee replacement, and dual chamber pacemaker implanted 1...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28558328/microscopic-evaluation-of-the-ventricular-tissue-using-stereological-and-voronoi-tessellation-methods-application-on-doxorubicin-induced-cardiotoxicity-in-rats
#19
Ali Rafati, Zahra Jafarinezhad, Saied Karbalay-Doust, Leila Hosseini, Ali Noorafshan
There is limited quantitative microscopic information concerning the three-dimensional arrangement of cardiomyocytes and microvessels in cardiotoxic condition. The aim of this study was to evaluate the cardiac tissue of rats under different experimental conditions using modern second-order stereology and Voronoi tessellation techniques to show the spatial arrangement of the cardiomyocytes and microvessels. Sprague-Dawley rats were randomly divided into two groups (n=6). The control group received PBS and the doxorubicin (DOX) group received 4mg/kg DOX on days 1, 8, 15, and 22...
May 24, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28556366/a-role-for-primary-cilia-in-aortic-valve-development-and-disease
#20
Katelynn A Toomer, Diana Fulmer, Lilong Guo, Alex Drohan, Neal Peterson, Paige Swanson, Brittany Brooks, Rupak Mukherjee, Simon Body, Josh Lipschutz, Andy Wessels, Russell A Norris
BACKGROUND: Bicuspid aortic valve (BAV) disease is the most common congenital heart defect affecting 0.5-1.2% of the population and causes significant morbidity and mortality. Only a few genes have been identified in pedigrees and no single gene-model explains BAV inheritance, thus supporting a complex genetic network of interacting genes. However, patients with rare syndromic diseases that stem from alterations in the structure and function of primary cilia ("ciliopathies") exhibit BAV as a frequent cardiovascular finding, suggesting primary cilia may factor broadly in disease etiology...
May 27, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
keyword
keyword
113872
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"