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https://www.readbyqxmd.com/read/28545280/-impacts-of-early-metoprolol-intervention-on-connexin-43-and-phosphorylated-connexin-43-expression-in-rabbits-with-experimental-myocardial-infarction
#1
M Zhou, Q Lu, J Q Jiang, Z N Chen, Z G Gong, Z G Li, W W Fu, S F Ding
Objective: To investigate the early intervention effects of metoprolol on connexin 43(Cx43) and phosphorylated Cx43 (p-Cx43) expression in rabbits with post myocardial infarction. Methods: A total of 24 adult male New Zealand white rabbits were divided into sham group (n=6), early treatment group(n=6), routine treatment group(n=6), and myocardial infarction group(n=6) with a randomized block design blocked by weight. Myocardial infarction was induced by left anterior descending coronary artery (LAD) ligation...
April 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28544839/isolated-right-ventricular-apical-trabecular-hypoplasia-a-case-report
#2
Qi Tan, Jie Zi, Mei Zhu, Anbiao Wang
Right ventricular (RV) hypoplasia with isolated myocardial disease and complete absence of RV trabeculae is a rare congenital heart disease, the current treatment of which is ineffective. Here, a rare case is presented of a middle-aged female patient with RV hypoplasia complicated by tricuspid regurgitation, right atrial thrombus, and atrial fibrillation. The patient was treated with a one-and-a-half ventricular repair, and showed significant improvements in cardiac function and physical activity tolerance...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544787/analysis-of-adults-with-congenital-heart-disease-presenting-to-pediatric-emergency-departments-with-arrhythmias
#3
Shaun Mohan, Brady S Moffett, Wilson Lam, Caridad de la Uz, Christina Miyake, Santiago O Valdes, Jeffrey J Kim
OBJECTIVE: As survivors of congenital heart disease (CHD) continue to age, healthcare utilization by this population has increased. It is unknown how often these patients utilize the emergency department (ED) at children's hospitals and how arrhythmias play a role in their utilization of care. DESIGN: Using a retrospective cohort design, the Pediatric Hospital Information System (PHIS) database was investigated and we studied adults (≥18 years) with CHD (ACHD) who presented to pediatric EDs from 2004 to 2014...
May 22, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28544489/thromboembolic-and-bleeding-complications-during-oral-anticoagulation-therapy-in-cancer-patients-with-atrial-fibrillation-a-danish-nationwide-population-based-cohort-study
#4
Anne G Ording, Erzsébet Horváth-Puhó, Kasper Adelborg, Lars Pedersen, Paolo Prandoni, Henrik T Sørensen
Coexisting cancer in patients with atrial fibrillation (AF) has been associated with thromboembolism and bleeding. We used Danish population-based medical databases to conduct a population-based cohort study that included all AF patients who redeemed a prescription for vitamin K antagonists (VKA) or non-VKA oral anticoagulant (NOAC) between July 2004 and December 2013. We characterized these patients according to the presence (N = 11,855) or absence (N = 56,264) of a cancer diagnosis before redemption of their oral anticoagulant prescription, and then examined their 1-year risk of thromboembolic or bleeding complications or death...
May 19, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28544422/assessment-of-clinically-relevant-bleeding-as-a-surrogate-outcome-for-major-bleeding-validation-by-meta-analysis-of-randomized-controlled-trials
#5
S Laporte, C Chapelle, L Bertoletti, E Ollier, P Zufferey, J-C Lega, A Merah, H Décousus, S Schulman, G Meyer, M Cucherat, P Mismetti
BACKGROUND: Clinically relevant bleeding (CRB), comprising major bleeding and clinically relevant non-major bleeding, has been used as a surrogate for major bleeding in most anticoagulant trials, but its validity for estimating compromise between thrombotic and bleeding events has never been assessed. METHODS: We systematically reviewed randomized phase III trials comparing new anticoagulants with standard of care for venous thromboembolism prevention following major orthopedic surgery, venous thromboembolism (VTE) treatment, or stroke and systemic embolism prevention in atrial fibrillation (AF), and reporting both major bleeding and CRB rates...
May 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28544274/antithrombotic-therapy-in-end-stage-renal-disease
#6
REVIEW
Svetha Chunduri, Jon E Folstad, Tushar J Vachharajani
The delicate balance of risk vs. benefit of using antiplatelet and antithrombotic agents in the general population is well established. The decision to use these agents in the end stage renal disease (ESRD) population remains complex and difficult. The concomitant association of a prothombotic state with high risk of bleeding in the ESRD population requires individualization and careful clinical judgment before implementing such therapy. There remains a paucity of clinical trials and lack of substantial evidence in literature for safe and effective use of antithrombotic drugs in patients with advanced chronic kidney disease...
May 23, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28544166/clinical-features-of-extremely-elderly-patients-with-heart-failure
#7
Tetsuro Yokokawa, Akiomi Yoshihisa, Yuki Kanno, Takamasa Sato, Satoshi Suzuki, Tomofumi Misaka, Masayoshi Oikawa, Atsushi Kobayashi, Takayoshi Yamaki, Hiroyuki Kunii, Kazuhiko Nakazato, Hitoshi Suzuki, Shu-Ichi Saitoh, Yasuchika Takeishi
AIM: To investigate the clinical features of heart failure in extremely elderly patients. METHODS: We analyzed 1163 consecutive hospitalized heart failure patients. The patients were divided into an extremely elderly group (≥85 years-of-age, n = 88) and a non-extremely elderly group (<85 years-of-age, n = 1075). RESULTS: The extremely elderly group had higher rates of hypertension, chronic kidney disease, anemia, higher systolic blood pressure and lower body mass index, and lower use of β-blockers and anticoagulants compared with the non-extremely elderly group...
May 21, 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/28544138/inhibition-of-the-aggregation-and-toxicity-of-the-minimal-amyloidogenic-fragment-of-tau-by-its-pro-substituted-analogs
#8
Marina Chemerovski-Glikman, Moran Frenkel-Pinter, Amjaad Abu-Mokh, Ragad Mdah, Ehud Gazit, Daniel Segal
Inhibiting the toxic aggregation of amyloid-β and the tau protein, the key pathological agents involved in Alzheimer's, is a leading approach in modulating disease progression. Using an aggregative tau-derived model peptide, Ac-PHF6-NH2, we show that substitution of its amino acids with Proline, a known efficient β-breaker, reduces its self-assembly. This effect is attributed to the steric hindrance created by the Proline substitution, which results in disruption of the β-sheet formation process. Moreover, several of the Proline-substituted peptides inhibit the aggregation of Ac-PHF6-NH2 amyloidogenic peptide...
May 23, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28544119/common-fibril-structures-imply-systemically-conserved-protein-misfolding-pathways-in%C3%A2-vivo
#9
Karthikeyan Annamalai, Falk Liberta, Marie-Theres Vielberg, William Close, Hauke Lilie, Karl-Heinz Gührs, Angelika Schierhorn, Rolf Koehler, Andreas Schmidt, Christian Haupt, Ute Hegenbart, Stefan Schönland, Matthias Schmidt, Michael Groll, Marcus Fändrich
Systemic amyloidosis is caused by the misfolding of a circulating amyloid precursor protein and the deposition of amyloid fibrils in multiple organs. Chemical and biophysical analysis of amyloid fibrils from human AL and murine AA amyloidosis reveal the same fibril morphologies in different tissues or organs of one patient or diseased animal. The observed structural similarities concerned the fibril morphology, the fibril protein primary and secondary structures, the presence of post-translational modifications and, in case of the AL fibrils, the partially folded characteristics of the polypeptide chain within the fibril...
May 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28543807/aromatic-interaction-mediated-inhibition-of-%C3%AE-amyloid-assembly-structures-and-cytotoxicity
#10
Hanyi Xie, Jiaxi Peng, Changliang Liu, Xiaocui Fang, Hongyang Duan, Yimin Zou, Yanlian Yang, Chen Wang
Abnormal aggregation of β-amyloid (Aβ) peptide plays an important role in the onset and progress of Alzheimer's disease (AD); hence, targeting Aβ aggregation is considered as an effective therapeutic strategy. Here, we studied the aromatic-interaction-mediated inhibitory effect of oligomeric polypeptides (K8Y8, K4Y8, K8W8) on Aβ42 fibrillization process. The polypeptides containing lysine as well as representative aromatic amino acids of tryptophan or tyrosine were found to greatly suppress the aggregation as evaluated by thioflavin T assay...
May 23, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28543771/right-ventricular-pacemaker-lead-position-is-associated-with-differences-in-long-term-outcomes-and-complications
#11
Chance M Witt, Charles J Lenz, Henry H Shih, Elisa Ebrille, Andrew N Rosenbaum, Martin van Zyl, Htin Aung, Kevin K Manocha, Abhishek J Deshmukh, David O Hodge, Siva K Mulpuru, Yong-Mei Cha, Raul E Espinosa, Samuel J Asirvatham, Christopher J McLeod
INTRODUCTION: Cardiac pacing from the right ventricular apex is associated with detrimental long-term effects and non-apical pacing locations may be associated with improved outcomes. There is little data regarding complications with non-apical lead positions. The aim of this study was to assess long-term outcomes and lead-related complications associated with differing ventricular lead tip position. METHODS AND RESULTS: All adult patients who underwent dual-chamber pacemaker implantation from 2004-2014 were included if they had post-procedure chest radiographs amenable to lead position determination...
May 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28543401/oral-anticoagulation-management-in-patients-with-atrial-fibrillation-undergoing-cardiac-implantable-electronic-device-implantation
#12
Eric Black-Maier, Sunghee Kim, Benjamin A Steinberg, Gregg C Fonarow, James V Freeman, Peter R Kowey, Jack Ansell, Bernard J Gersh, Kenneth W Mahaffey, Gerald Naccarelli, Elaine M Hylek, Alan S Go, Eric D Peterson, Jonathan P Piccini
BACKGROUND: Oral anticoagulation (OAC) therapy is associated with increased periprocedural risks after cardiac implantable electronic device (CIED) implantation. Patterns of anticoagulation management involving non-vitamin K antagonist oral anticoagulants (NOACs) have not been characterized. HYPOTHESIS: Anticoagulation strategies and outcomes differ by anticoagulant type in patients undergoing CIED implantation. METHODS: Using the nationwide Outcomes Registry for Better Informed Treatment of Atrial Fibrillation, we assessed how atrial fibrillation (AF) patients undergoing CIED implantation were cared for and their subsequent outcomes...
May 19, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28543286/impact-of-treatment-crossovers-on-clinical-outcomes-in-the-rate-and-rhythm-control-strategies-for-atrial-fibrillation-insights-from-the-affirm-atrial-fibrillation-follow-up-investigation-of-rhythm-management-trial
#13
Abhishek Maan, Zheng Zhang, Ziling Qin, Yanbing Wang, Samuel Dudley, Kaustubh Dabhadakar, Marwan Refaat, Moussa Mansour, Jeremy N Ruskin, E Kevin Heist
We investigated the rates and reasons for crossover to alternative treatment strategies and its impact on mortality in patients who were enrolled in the AFFIRM trial. Over a mean follow-up period of 3.5 years, 842 patients underwent crossover to the alternative treatment arms in AFFIRM. The rate of crossover from rhythm to rate control (594/2033, 29.2%) was more frequent than the rate of crossover from rate to rhythm control (248/2027, 12.2%, p < 0.0001). The leading reasons for crossover from rhythm to rate control were failure to achieve or maintain sinus rhythm (272/594, 45...
May 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28543265/stricter-criteria-for-left-bundle-branch-block-diagnosis-do-not-improve-response-to-crt
#14
Emanuele Bertaglia, Federico Migliore, Anna Baritussio, Antonio De Simone, Albino Reggiani, Domenico Pecora, Antonio D'Onofrio, Antonio Rapacciuolo, Gianluca Savarese, Attilio Pierantozzi, Biondino Marenna, Franco Ruffa, Monica Campari, Maurizio Malacrida, Giuseppe Stabile
BACKGROUND: Cardiac resynchronization therapy (CRT) has proved to be effective in patients with heart failure and left bundle branch block (LBBB). Recently, new ECG criteria have been proposed for the diagnosis of LBBB. These criteria are stricter than the current American Heart Association (AHA) criteria. We assessed the rate of echocardiographic response to CRT in patients with traditional LBBB versus patients who met the new criteria (strict LBBB). METHODS: Consecutive patients undergoing CRT were enrolled in the CRT MORE registry...
May 23, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28543103/comparison-between-local-and-systemic-injection-of-adenosine-for-detecting-dormant-conduction-after-pv-isolation
#15
Myung-Jin Cha, Eue-Keun Choi, Seil Oh
BACKGROUND: Adenosine administration after pulmonary vein (PV) isolation is effective for identifying dormant conduction (DC). We aimed to compare the efficacy and safety of local injection of adenosine into the PV with systemic intravenous injection. METHODS: After complete PV isolation was performed, adenosine was injected directly into the PV (local method; 6-18 mg) and the femoral vein (systemic method, 12-30 mg) sequentially. We compared the incidence of DC and the hemodynamic effect of adenosine between the methods...
May 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28543036/self-assembly-of-two-hydrophobins-from-marine-fungi-affected-by-interaction-with-surfaces
#16
Paola Cicatiello, Principia Dardano, Marinella Pirozzi, Alfredo Maria Gravagnuolo, Luca De Stefano, Paola Giardina
Hydrophobins are amphiphilic fungal proteins endowed with peculiar characteristics, such as a high surface activity and an interface triggered self-assembly. Several applications of these proteins have been proposed in the food, cosmetics and biomedical fields. Moreover, their use as proteinaceous coatings can be effective for materials and nanomaterials applications. The discovery of novel hydrophobins with diverse properties may be advantageous from both the scientific and industrial points of view. Stressful environmental conditions of fungal growth may induce the production of proteins with peculiar features...
May 22, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28542844/the-inward-rectifier-current-inhibitor-pa-6-terminates-atrial-fibrillation-and-does-not-cause-ventricular-arrhythmias-in-dedicated-goat-and-dog-models
#17
Yuan Ji, Rosanne Varkevisser, Dragan Opacic, Alexandre Bossu, Marion Kuiper, Jet D M Beekman, Sihyung Yang, Azinwi Phina Khan, Dobromir Dobrev, Niels Voigt, Michael Zhuo Wang, Sander Verheule, Marc A Vos, Marcel A G Van der Heyden
BACKGROUND AND PURPOSE: Inward rectifier current (IK1 ) density increases in atrial fibrillation (AF), shortening effective refractory period and thus promotes atrial reentry. Pentamidine-Analogue 6 (PA-6) is a selective and potent IK1 inhibitor. We tested PA-6 for anti-AF efficacy and potential proarrhythmia, in established large animal models. EXPERIMENTAL APPROACH: PA-6 was applied i.v. in anaesthetized goats with rapid pacing induced AF and anaesthetized chronic AV block dogs...
May 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28542605/voxelwise-distribution-of-acute-ischemic-stroke-lesions-in-patients-with-newly-diagnosed-atrial-fibrillation-trigger-of-arrhythmia-or-only-target-of-embolism
#18
Timolaos Rizos, Andreas J Bartsch, Timothy D Johnson, Felix Dittgen, Thomas E Nichols, Uwe Malzahn, Roland Veltkamp
OBJECTIVE: Atrial fibrillation (AF) is frequently detected after ischemic stroke for the first time, and brain regions involved in autonomic control have been suspected to trigger AF. We examined whether specific brain regions are associated with newly detected AF after ischemic stroke. METHODS: Patients with acute cerebral infarctions on diffusion-weighted magnetic resonance imaging were included in this lesion mapping study. Lesions were mapped and modeled voxelwise using Bayesian Spatial Generalised Linear Mixed Modeling to determine differences in infarct locations between stroke patients with new AF, without AF and with AF already known before the stroke...
2017: PloS One
https://www.readbyqxmd.com/read/28542382/uv-b-induced-fibrillization-of-crystallin-protein-mixtures
#19
Sibel Cetinel, Valentyna Semenchenko, Jae-Young Cho, Mehdi Ghaffari Sharaf, Karim F Damji, Larry D Unsworth, Carlo Montemagno
Environmental factors, mainly oxidative stress and exposure to sunlight, induce the oxidation, cross-linking, cleavage, and deamination of crystallin proteins, resulting in their aggregation and, ultimately, cataract formation. Various denaturants have been used to initiate the aggregation of crystallin proteins in vitro. All of these regimens, however, are obviously far from replicating conditions that exist in vivo that lead to cataract formation. In fact, it is our supposition that only UV-B radiation may mimic the observed in vivo cause of crystallin alteration leading to cataract formation...
2017: PloS One
https://www.readbyqxmd.com/read/28542320/the-ik1-kir2-1-channel-agonist-zacopride-prevents-and-cures-acute-ischemic-arrhythmias-in-the-rat
#20
Xu-Wen Zhai, Li Zhang, Yun-Fei Guo, Ying Yang, Dong-Ming Wang, Yan Zhang, Pan Li, Yi-Fan Niu, Qi-Long Feng, Bo-Wei Wu, Ji-Min Cao, Qing-Hua Liu
Arrhythmogenesis in acute myocardial infarction (MI) is associated with depolarization of resting membraine potential (RMP) and decrease of inward rectifier potassium current (IK1) in cardiomyocytes. However, clinical anti-arrhythmic agents that primarily act on RMP by enhancing the IK1 channel are not currently available. We hypothesized that zacopride, a selective and moderate agonist of the IK1/Kir2.1 channels, prevents and cures acute ischemic arrhythmias. To test this viewpoint, adult Sprague-Dawley (SD) rats were subjected to MI by ligating the left main coronary artery...
2017: PloS One
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