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https://www.readbyqxmd.com/read/28431453/carboxymethyl-%C3%AE-cyclodextrin-as-chiral-selector-in-capillary-electrophoresis-enantioseparation-of-16-basic-chiral-drugs-and-its-chiral-recognition-mechanism-associated-with-drugs-structural-features
#1
Linlin Fang, Yueying Du, Xiaoyu Hu, Linda Luo, Xin Guo, Xingjie Guo, Jia Yu
Herein we present the enantioseparation of 10 cardiovascular agents and 6 bronchiectasis drugs including propranolol, carteolol, metoprolol, atenolol, pindolol, esmolol, bisoprolol, bevantolol, arotinolol, sotalol, clenbuterol, procaterol, bambuterol, tranterol, salbutamol and terbutaline sulfate using carboxymethyl-β-cyclodextrin (CM-β-CD) as chiral selector. To our knowledge, there is no literature about using CM-β-CD for separating carteolol, esmolol, bisoprolol, bevantolol, arotinolol, procaterol, bambuterol and tranterol...
April 21, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28419217/shock-efficacy-of-single-and-dual-coil-electrodes-new-insights-from-the-nordic-icd-trial
#2
Dietmar Bänsch, Hendrik Bonnemeier, Johan Brandt, Frank Bode, Jesper Hastrup Svendsen, Oliver Ritter, Johannes Aring, Klaus-Jürgen Gutleben, Ralph Schneider, Angelika Felk, Tino Hauser, Anika Buchholz, Gerhard Hindricks, Karl Wegscheider
Aims: Dual coil (DC) electrodes are preferred to single coil (SC) electrodes because of an assumed higher shock efficacy. However, DC-electrodes may be associated with an increased difficulty and risk of lead extraction. We aimed to compare SC- and DC-electrodes with respect to the first shock efficacy (FSE) after implantable cardioverter defibrillator (ICD) implantation. Methods and results: One thousand and seventy-seven patients of the NORDIC ICD trial were randomly assigned to first time ICD implantation with or without defibrillation (DF) testing...
April 13, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28382363/micropatterned-co-culture-of-cardiac-myocytes-on-fibrous-scaffolds-for-predictive-screening-of-drug-cardiotoxicities
#3
Yaowen Liu, Tian Xia, Jiaojun Wei, Qingjie Liu, Xiaohong Li
The spatial arrangement of cardiac myocytes (CMs) and other non-myocytes scaffolds, closely resembling native tissue, is essential to control the CM morphology and function for cardiac tissue regeneration. In the current study, micropatterned fibrous scaffolds were developed to establish a CM co-culture system with cardiac fibroblasts (CFs) and endothelial cells (ECs) as a potential in vitro drug screening model. To pursue a biomimetic approach to influence CM behaviors, strip, oval and wave-patterned mats were constructed by deposition of electrospun fibers on lithographic collectors, followed by precise stacking for cell co-cultures...
April 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/28365182/hopes-and-disappointments-with-antiarrhythmic-drugs
#4
A John Camm
Ventricular arrhythmias such as sustained ventricular tachycardia and ventricular fibrillation account for two thirds of sudden cardiac deaths. Most ventricular tachyarrhythmias have well understood mechanisms such that it is theoretically possible to conceive of an antiarrhythmic drug-based intervention that would prevent arrhythmias that cause sudden cardiac death. Pharmaceutical agents which interfere with ion channel activity are known as antiarrhythmic drugs. Acute experiments showing antiarrhythmic effects in the basic science laboratory have often not translated into clinical effectiveness...
March 16, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28341360/use-of-antiarrhythmic-medications-in-medicare-part-d-patients-with-an-implantable-cardioverter-defibrillator-and-ventricular-tachycardia
#5
Sean D Pokorney, Xiaojuan Mi, Bradley G Hammill, Nancy M Allen LaPointe, Lesley H Curtis, Sana M Al-Khatib
Ventricular tachycardia (VT) is common in cardiomyopathy patients with an implantable cardioverter-defibrillator. This analysis evaluated antiarrhythmic medication use and change in use over time in patients with VT and structural heart disease. Query of Medicare claims identified patients with an implantable cardioverter-defibrillator and VT. Patients with atrial fibrillation or supraventricular tachycardia were excluded. Two cohorts were created of patients enrolled in Medicare Part D for the 12 months before 2007 and 2012...
May 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28336184/atrial-fibrillation-management-in-a-breeding-stallion
#6
N Heliczer, K Mitchell, O Lorello, J Dauvillier, D Burger, C C Schwarzwald, C Navas de Solis
A 20-year-old warmblood breeding stallion presented to a University practice for semen collection and evaluation was incidentally diagnosed with atrial fibrillation (AF). Electrocardiogram recordings during breeding revealed inappropriately rapid tachycardia and occasional ventricular premature depolarizations/aberrant ventricular conduction. Transvenous electrical cardioversion was performed. After successful cardioversion the horse displayed supraventricular ectopy and atrial contractile dysfunction and was administered sotalol hydrochloride in an attempt to decrease the risk of AF recurrence...
March 20, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28287432/a-biologically-based-computational-approach-to-drug-repurposing-for-anthrax-infection
#7
Jane P F Bai, Theodore Sakellaropoulos, Leonidas G Alexopoulos
Developing drugs to treat the toxic effects of lethal toxin (LT) and edema toxin (ET) produced by B. anthracis is of global interest. We utilized a computational approach to score 474 drugs/compounds for their ability to reverse the toxic effects of anthrax toxins. For each toxin or drug/compound, we constructed an activity network by using its differentially expressed genes, molecular targets, and protein interactions. Gene expression profiles of drugs were obtained from the Connectivity Map and those of anthrax toxins in human alveolar macrophages were obtained from the Gene Expression Omnibus...
March 10, 2017: Toxins
https://www.readbyqxmd.com/read/28283175/efficacy-of-intravenous-sotalol-for-treatment-of-incessant-tachyarrhythmias-in-children
#8
Xiaomei Li, Yan Zhang, Haiju Liu, He Jiang, Haiyan Ge, Yi Zhang
Our objective was to evaluate the efficacy and safety of intravenous (IV) sotalol in the treatment of incessant tachyarrhythmias in children with normal cardiac function. Eighty-three children admitted to hospital from October 2011 to December 2014 were treated with IV sotalol or IV sotalol plus IV propafenone. The time to conversion to sinus rhythm and maintaining sinus rhythm were evaluated. Blood pressure, heart rate, QTc, PR intervals, and rhythm were monitored; 50 patients (60%) were converted to sinus rhythm with IV sotalol; time to conversion was 12...
May 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28265962/treatment-of-fetal-supraventricular-tachycardia
#9
REVIEW
Bridget B Zoeller
Fetal arrhythmia is a common reason for referral to fetal cardiology. Fetal supraventricular tachycardia can be subdivided into several groups with the most common being re-entrant supraventricular tachycardia and atrial flutter. Fetal tachycardia can lead to hydrops fetalis, which increases the risk of fetal demise, perinatal morbidities, and premature delivery. The diagnosis of fetal tachycardia can be a challenge as a traditional electrocardiogram cannot be completed on a fetus, and other methods must be used by fetal echocardiogram...
January 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28189026/mass-spectrometry-based-in%C3%A2-vitro-assay-investigations-on-the-transformation-of-pharmaceutical-compounds-by-oxidative-enzymes
#10
Lara F Stadlmair, Thomas Letzel, Jörg E Drewes, Johanna Graßmann
The ubiquitous presence of trace organic chemicals in wastewater and surface water leads to a growing demand for novel removal technologies. The use of isolated enzymes has been shown to possess the capability for a targeted application but requires a clearer mechanistic understanding. In this study, the potential of peroxidase from horseradish (HRP) and laccase from Pleurotus ostreatus (LccPO) to transform selected trace organic chemicals was studied using mass spectrometry (MS)-based in vitro enzyme assays...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28134617/modeling-susceptibility-to-drug-induced-long-qt-with-a-panel-of-subject-specific-induced-pluripotent-stem-cells
#11
Francesca Stillitano, Jens Hansen, Chi-Wing Kong, Ioannis Karakikes, Christian Funck-Brentano, Lin Geng, Stuart Scott, Stephan Reynier, Ma Wu, Yannick Valogne, Carole Desseaux, Joe-Elie Salem, Dorota Jeziorowska, Noël Zahr, Ronald Li, Ravi Iyengar, Roger J Hajjar, Jean-Sébastien Hulot
A large number of drugs can induce prolongation of cardiac repolarization and life-threatening cardiac arrhythmias. The prediction of this side effect is however challenging as it usually develops in some genetically predisposed individuals with normal cardiac repolarization at baseline. Here, we describe a platform based on a genetically diverse panel of induced pluripotent stem cells (iPSCs) that reproduces susceptibility to develop a cardiotoxic drug response. We generated iPSC-derived cardiomyocytes from patients presenting in vivo with extremely low or high changes in cardiac repolarization in response to a pharmacological challenge with sotalol...
January 30, 2017: ELife
https://www.readbyqxmd.com/read/28102360/modification-of-distinct-ion-channels-differentially-modulates-ca-2-dynamics-in-primary-cultured-rat-ventricular-cardiomyocytes
#12
Xichun Li, Liping Shen, Fang Zhao, Xiaohan Zou, Yuwei He, Fan Zhang, Chunlei Zhang, Boyang Yu, Zhengyu Cao
Primary cultured cardiomyocytes show spontaneous Ca(2+) oscillations (SCOs) which not only govern contractile events, but undergo derangements that promote arrhythmogenesis through Ca(2+) -dependent mechanism. We systematically examined influence on SCOs of an array of ion channel modifiers by recording intracellular Ca(2+) dynamics in rat ventricular cardiomyocytes using Ca(2+) specific fluorescence dye, Fluo-8/AM. Voltage-gated sodium channels (VGSCs) activation elongates SCO duration and reduces SCO frequency while inhibition of VGSCs decreases SCO frequency without affecting amplitude and duration...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097003/application-of-a-systems-pharmacology-model-for-translational-prediction-of-herg-mediated-qtc-prolongation
#13
Verena Gotta, Zhiyi Yu, Frank Cools, Karel van Ammel, David J Gallacher, Sandra A G Visser, Frederick Sannajust, Pierre Morissette, Meindert Danhof, Piet H van der Graaf
Drug-induced QTc interval prolongation (Δ QTc) is a main surrogate for proarrhythmic risk assessment. A higher in vivo than in vitro potency for hERG-mediated QTc prolongation has been suggested. Also, in vivo between-species and patient populations' sensitivity to drug-induced QTc prolongation seems to differ. Here, a systems pharmacology model integrating preclinical in vitro (hERG binding) and in vivo (conscious dog Δ QTc) data of three hERG blockers (dofetilide, sotalol, moxifloxacin) was applied (1) to compare the operational efficacy of the three drugs in vivo and (2) to quantify dog-human differences in sensitivity to drug-induced QTc prolongation (for dofetilide only)...
December 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28070113/pharmacological-characterization-of-microminipig-as-a-model-to-assess-the-drug-induced-cardiovascular-responses-for-non-clinical-toxicity-and-or-safety-pharmacology-studies
#14
Hirofumi Yokoyama, Yuji Nakamura, Hiroyuki Saito, Yukitoshi Nagayama, Kiyotaka Hoshiai, Takeshi Wada, Hiroko Izumi-Nakaseko, Kentaro Ando, Yasuki Akie, Atsushi Sugiyama
We tried to establish the halothane-anesthetized microminipigs as an alternative animal model for non-clinical toxicity and/or safety pharmacology studies. In order to characterize the halothane-anesthetized microminipigs, we firstly clarified the effects of halothane anesthesia on their cardiovascular system (n = 5). Then, we examined the cardiovascular effects of dl-sotalol in doses of 0.1, 0.3 and 1 mg/kg, i.v. on the halothane-anesthetized microminipigs (n = 6). Induction of the halothane anesthesia by itself prolonged the QT interval as well as QTcF, suggesting that the halothane anesthesia can reduce the cardiac repolarization reserve in microminipigs like in dogs...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/27990843/impact-of-qt-interval-prolongation-following-antiarrhythmic-drug-therapy-on-left-ventricular-function
#15
Konstantinos Chouchoulis, John Chiladakis, Nikolaos Koutsogiannis, Periklis Davlouros, Maria Kaza, Dimitrios Alexopoulos
AIM: We assessed whether antiarrhythmic drug-induced QT interval prolongation affects left ventricular function. METHODS: Study population included 54 patients with symptomatic recent onset atrial fibrillation spontaneously cardioverted to sinus rhythm. Electrocardiographic and echocardiographic studies were done before initiating and after achieving drug's steady state. RESULTS: Significantly prolonged corrected QT interval (QTc) was noticed following only sotalol and amiodarone...
January 2017: Future Cardiology
https://www.readbyqxmd.com/read/27939893/use-of-flecainide-in-combination-antiarrhythmic-therapy-in-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy
#16
Simon Ermakov, Edward P Gerstenfeld, Yana Svetlichnaya, Melvin M Scheinman
BACKGROUND: Antiarrhythmic therapy is commonly used for suppression of arrhythmias in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) in conjunction with implantable cardioverter-defibrillators and catheter ablation. The efficacy of combination flecainide and sotalol/metoprolol therapy for patients refractory to single agents and/or catheter ablation has not been well established. OBJECTIVE: The purpose of this study was to describe our experience with the addition of flecainide in combination with sotalol/metoprolol for treatment of arrhythmias in patients with ARVC...
December 9, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27931611/arrhythmogenic-right-ventricular-cardiomyopathy-clinical-course-and-predictors-of-arrhythmic-risk
#17
Andrea Mazzanti, Kevin Ng, Alessandro Faragli, Riccardo Maragna, Elena Chiodaroli, Nicoletta Orphanou, Nicola Monteforte, Mirella Memmi, Patrick Gambelli, Valeria Novelli, Raffaella Bloise, Oronzo Catalano, Guido Moro, Valentina Tibollo, Massimo Morini, Riccardo Bellazzi, Carlo Napolitano, Vincenzo Bagnardi, Silvia G Priori
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a leading cause of sudden cardiac death, but its progression over time and predictors of arrhythmias are still being defined. OBJECTIVES: This study sought to describe the clinical course of ARVC and occurrence of life-threatening arrhythmic events (LAE) and cardiovascular mortality; identify risk factors associated with increased LAE risk; and define the response to therapy. METHODS: We determined the clinical course of 301 consecutive patients with ARVC using the Kaplan-Meier method adjusted to avoid the bias of delayed entry...
December 13, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27925253/fast-and-sensitive-analysis-of-beta-blockers-by-ultra-high-performance-liquid-chromatography-coupled-with-ultra-high-resolution-tof-mass-spectrometry
#18
Jana Tomková, Peter Ondra, Eva Kocianová, Jan Václavík
This paper presents a method for the determination of acebutolol, betaxolol, bisoprolol, metoprolol, nebivolol and sotalol in human serum by liquid-liquid extraction and ultra-high-performance liquid chromatography coupled with ultra-high-resolution TOF mass spectrometry. After liquid-liquid extraction, beta blockers were separated on a reverse-phase analytical column (Acclaim RS 120; 100 × 2.1 mm, 2.2 μm). The total run time was 6 min for each sample. Linearity, limit of detection, limit of quantification, matrix effects, specificity, precision, accuracy, recovery and sample stability were evaluated...
December 7, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27909477/sotalol-versus-amiodarone-in-treatment-of-atrial-fibrillation
#19
John Somberg, Janos Molnar
The availability of intravenous (IV) Sotalol has equalized the treatment options since both amiodarone and sotalol are available in both IV and oral formulations. A review of the efficacy of sotalol as compared to amiodarone both for conversion of atrial fibrillation (AF) and maintenance of normal sinus rhythm (NSR) following cardiac surgery was undertaken. Standard methods of meta-analysis were employed. Full text publications of clinical trials written in English that compared the efficacy of sotalol to amiodarone were included in the analysis...
February 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27903390/-current-status-of-antiarrhythmic-drug-use-and-safety-assessment-in-chinese-patients-with-atrial-fibrillation
#20
R He, X Du, S W Liu, L J Sun, Y Li, H Zeng, Y Y Li, C Sun, Y Zhang, C S Ma, W Gao
Objective: To investigate the current status of antiarrhythmic drugs (AADs) use in Chinese patients with atrial fibrillation(AF) and assess the safety of AADs in this patient cohort. Methods: From January 2011 to December 2013, a total of 4 008 AF patients treated with AADs was enrolled in this study and patients were followed up for 24 months. Detailed information of prescribed drug, the causes of drug discontinuation and side effects were recorded. Results: Amiodarone was prescribed to 64.3%(2 579 cases) and propafenone to 31...
November 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
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