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https://www.readbyqxmd.com/read/29684665/anti-trypanosoma-cruzi-action-of-a-new-benzofuran-derivative-based-on-amiodarone-structure
#1
Andrea Pinto-Martinez, Vanessa Hernández-Rodríguez, Jessica Rodríguez-Durán, Elżbieta Hejchman, Gustavo Benaim
Chagas disease is a neglected tropical affection caused by the protozoan parasite Trypanosoma cruzi. There is no current effective treatment since the only two available drugs have a limited efficacy and produce side effects. Thus, investigation efforts have been directed to the identification of new drug leads. In this context, Ca2+ regulating mechanisms have been postulated as targets for antiparasitic compounds, since they present paramount differences when compared to host cells. Amiodarone is an antiarrhythmic with demonstrated trypanocidal activity acting through the disruption of the parasite intracellular Ca2+ homeostasis...
April 11, 2018: Experimental Parasitology
https://www.readbyqxmd.com/read/29672879/increased-left-atrial-size-is-associated-with-higher-atrial-fibrillation-recurrence-in-patients-treated-with-anti-arrhythmic-medications
#2
Saarang Mulukutla, Andrew D Althouse, Sandeep K Jain, Samir Saba
BACKGROUND: Atrial fibrillation (AF) is highly prevalent and antiarrhythmic therapy is often used to help with rhythm control. Some common echocardiographic parameters may be useful in predicting AF recurrence among these patients. OBJECTIVES: The purpose of this study was to evaluate the association between three common echocardiographic parameters [left atrial (LA) size, left ventricular ejection fraction (LVEF), and mitral regurgitation (MR)] and AF recurrence among patients treated with anti-arrhythmic medications...
April 19, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29671888/whole-exome-sequencing-reveals-microsatellites-dna-markers-for-response-to-dofetilide-initiation-in-patients-with-persistent-atrial-fibrillation-a-pilot-study
#3
Nick Kinney, Timothy R Larsen, David M Kim, Robin T Varghese, Steven Poelzing, Harold R Garner, Soufian T AlMahameed
BACKGROUND: Dofetilide is a class III antiarrhythmic drug effective for the treatment of atrial fibrillation (AF). Dofetilide initiation (DI) associate with corrected QT (QTc) interval prolongation. Significant QTc prolongation during DI mandates dose adjustment or discontinuation of the drug. Microsatellite DNA are novel genetic markers associate with congenital and acquired health conditions. OBJECTIVE: The purpose of this study was to explore potential genetic markers for QTc prolongation in response to DI in patients with persistent AF METHODS: We performed Whole Exome sequencing in a cohort of patients with persistent AF undergoing DI...
April 19, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29671278/evaluation-of-the-impact-of-an-institution-specific-dofetilide-initiation-protocol-on-mean-hospital-length-of-stay-and-cost-for-dofetilide-initiation
#4
Steven P Kennedy, Hanna Iaizzo, Evgueni Fayn, Dalip Singh
BACKGROUND: Dofetilide is a class III antiarrhythmic drug indicated for the conversion and maintenance of normal sinus rhythm in symptomatic patients with atrial fibrillation/atrial flutter. Delay in initiation of dofetilide therapy may increase the duration of hospitalization from two nights to three nights to complete US Food and Drug Administration-required monitoring. Therefore, substantial cost savings may be associated with implementation of an institution-specific dofetilide initiation protocol in order to reduce hospitalization to two nights...
April 18, 2018: PharmacoEconomics open
https://www.readbyqxmd.com/read/29670471/atrial-fibrillation-in-hypertension-patients-characteristics
#5
Styliani Koutsaki, Ioannis Koutelekos, Georgia Gerogianni, Maria Koutsaki, Aggeliki Koukouzeli, Georgia Fouka, Maria Polikandrioti
Background: The most common risk factor for Atrial Fibrillation (AF) development is hypertension. Purpose: to explore patients' characteristics associated with AF caused by hypertension. Methods: The sample of the study included 170 patients with AF caused by hypertension. Data collection was performed by the method of interview using a questionnaire developed by the researchers of the study for the collection of demographic, clinical and other patients' characteristics...
March 2018: Materia Socio-medica
https://www.readbyqxmd.com/read/29669504/atrial-fibrillation-in-autoimmune-rheumatic-diseases-from-the-pathogenesis-to-the-treatment
#6
Giuseppe Ciconte, Manuel Conti, Martina Evangelista, Carlo Pappone
BACKGROUND: Atrial fibrillation (AF) is the most prevalent cardiac arrhythmia in the general population and is associated with an increased number of adverse outcomes. The onset and maintenance of this arrhythmia requires a trigger event and the presence of a predisposing substrate. Atrial fibrosis, a major characteristic of AF-related structural remodeling, represents a process closely related to inflammation as demonstrated by emerging evidence. Aim of this article is to review the evidence linking AF to systemic autoimmune diseases...
April 17, 2018: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/29668588/a-delayed-diagnosis-of-catecholaminergic-polymorphic-ventricular-tachycardia-with-a-mutant-of-ryr2-at-c-7580t-g-for-6-years-in-a-9-year-old-child
#7
Hongyu Duan, Yongyi Lu, Song Yan, Lina Qiao, Yimin Hua, Yifei Li, Kaiyu Zhou, Chuan Wang
RATIONALE: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare but potentially lethal inherited arrhythmia syndrome induced by adrenergic stress. Due to the atypical clinical manifestations in early age, limited recognition and experience of pediatric cardiologists, and low awareness of the significance of genetic diagnosis in some underdeveloped areas in China, a delayed or missed diagnosis of CPVT in children is common and concerning. PATIENT CONCERNS: A 9-year and 3-month male child with recurrent exercise-induced syncope accompanied by convulsion was initially misdiagnosed as epilepsy since the first manifestation at the age of 3 years...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29663562/atrial-fibrillation-ablation-using-cryoballoon-technology-recent-advances-and-practical-techniques
#8
REVIEW
Shaojie Chen, Boris Schmidt, Stefano Bordignon, Fabrizio Bologna, Laura Perrotta, Takahiko Nagase, K R Julian Chun
Atrial fibrillation (AF) affects 1-2% of the population, and its prevalence is estimated to double in the next 50 years as the population ages. AF results in impaired patients' life quality, deteriorated cardiac function and even increased mortality. Antiarrhythmic drugs frequently fail to restore sinus rhythm. Catheter ablation is a valuable treatment approach for AF, even as a first-line therapy strategy in selected patients. Effective electrical pulmonary vein isolation (PVI) is the cornerstone of all AF ablation strategies...
April 16, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29655948/outcome-of-catheter-ablation-for-ventricular-tachycardia-in-patients-with-ischemic-cardiomyopathy-a-systematic-review-and-meta-analysis-of-randomized-clinical-trials
#9
Waddah Maskoun, Marwan Saad, Amjad Abualsuod, Ramez Nairooz, John M Miller
BACKGROUND: Current ventricular tachycardia (VT) management in patients with ischemic cardiomyopathy (ICM) includes optimal medical therapy, ICDs device therapy, and antiarrhythmic medications. Data about outcomes of catheter ablation (CA) in these patients is scarce. We aimed to perform a meta-analysis of RCTs to compare outcomes of CA vs conventional management of VT in ICM patients who had ICD. METHODS: A systematic review and meta-analysis of published RCTs between January 1970 and December 2016 were performed...
April 8, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29655477/cardiovascular-drugs-in-avian-small-mammal-and-reptile-medicine
#10
Brenna Colleen Fitzgerald, Sara Dias, Jaume Martorell
Cardiovascular disease, including congestive heart failure, pericardial disease, and atherosclerosis, is becoming increasingly better recognized in companion birds, small mammals, and reptiles. A wide range of medications is available to treat these conditions, including diuretics, vasodilators, positive and negative inotropes, antiarrhythmic agents, and pentoxifylline. This review systematically discusses each of these drug classes and their potential applications in exotic species. Although treatment approaches remain largely empirical and extrapolated from small animal and human medicine, the management strategies presented here have the potential to both maintain quality of life and extend survival time for the exotic cardiac patient...
May 2018: Veterinary Clinics of North America. Exotic Animal Practice
https://www.readbyqxmd.com/read/29653413/influence-of-propafenone-on-the-anticonvulsant-activity-of-various-novel-antiepileptic-drugs-in-the-mouse-maximal-electroshock-model
#11
Kinga K Borowicz-Reutt, Monika Popławska, Monika Banach, Dorota Wróblewska
BACKGROUND: The main mechanism of action of propafenone (antiarrhythmic drug) involves the inhibition of the fast inward sodium current during phase 0 of the action potential. Sodium channel-blocking activity is also characteristic for some antiepileptic drugs. Therefore, it could be assumed that propafenone may also affect seizures. In the present study, we evaluated the effect of propafenone on the protective effect of oxcarbazepine, lamotrigine, topiramate and pregabalin against the maximal electroshock-induced seizures in mice...
November 23, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29650123/interplay-between-genetic-substrate-qtc-duration-and-arrhythmia-risk-in-patients-with-long-qt-syndrome
#12
Andrea Mazzanti, Riccardo Maragna, Gaetano Vacanti, Nicola Monteforte, Raffaella Bloise, Maira Marino, Lorenzo Braghieri, Patrick Gambelli, Mirella Memmi, Eleonora Pagan, Massimo Morini, Alberto Malovini, Martin Ortiz, Luciana Sacilotto, Riccardo Bellazzi, Lorenzo Monserrat, Carlo Napolitano, Vincenzo Bagnardi, Silvia G Priori
BACKGROUND: Long QT syndrome (LQTS) is a common inheritable arrhythmogenic disorder, often secondary to mutations in the KCNQ1, KCNH2, and SCN5A genes. The disease is characterized by a prolonged ventricular repolarization (QTc interval) that confers susceptibility to life-threatening arrhythmic events (LAEs). OBJECTIVES: This study sought to create an evidence-based risk stratification scheme to personalize the quantification of the arrhythmic risk in patients with LQTS...
April 17, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29649357/amiodarone-induced-interstitial-and-organizing-pneumonia-reversed-with-steroids
#13
Kshitij Chatterjee, Yogita M Rochlani, Kevin Kuriakose, AndrewDunn, Khaled Khasawneh, Hakan Paydak
Amiodarone is a widely used antiarrhythmic agent for supraventricular and ventricular tachyarrhythmias. It is known to cause pulmonary toxicity, which can manifest in a variety of presentations, ranging from asymptomatic to fatal. We present a case of chronic interstitial pneumonia with organizing pneumonia induced by amiodarone that was successfully treated with drug cessation and use of corticosteroids. The patient experienced complete resolution of symptoms and full recovery of lung function after the course of steroids...
June 2017: Journal of the Arkansas Medical Society
https://www.readbyqxmd.com/read/29648531/propafenone-quantification-in-human-plasma-by-high-performance-liquid-chromatography-coupled-with-electrospray-tandem-mass-spectrometry-in-a-bioequivalence-study
#14
Beatrice Severino, Giancarlo Luisi, Renan Donomae Iwamoto, Ronilson Agnaldo Moreno, Victor Perez Teixeira, Paola Di Vaio, Irene Saccone, Elisa Magli, Vincenzo Santagada, Giuseppe Caliendo, Gustavo D Mendes, Gilberto De Nucci
Propafenone is an antiarrhythmic drug applied to ventricular arrhythmias, initially recognized as a sodium channel blocker. This study aims to evaluate the bioequivalence of two propafenone formulations (300 mg tablet) in healthy subjects under non-fasting conditions. The study was conducted as an open, randomized, 2-period design with a 2-sequence (RT, TR) with a 1-week washout interval. The subjects were selected for the study after having their health status previously assessed by a clinical evaluation and laboratory tests (biochemical and hematological parameters, and urinalysis)...
April 12, 2018: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29644157/persistent-bradycardia-with-the-long-term-use-of-phenytoin-and-oxycodone-first-case-report
#15
Intekhab Askari Syed, Aaron R Kuzel, Muhammad Uzair Lodhi, Waliul Chowdhury, Umar Rahim, Mustafa Rahim
Phenytoin is a medication that is used primarily in the treatment of epilepsy as well as generalized tonic-clonic seizures and status epilepticus. Phenytoin is also considered a class IB antiarrhythmic medication by shortening the duration of the action potential and increasing myocardial conduction. The neurologic adverse effects of phenytoin are well-documented and include altered mental status, ataxia, and nystagmus. Some adverse cardiac manifestations have also been reported, including arrhythmias, hypotension, and respiratory arrest...
February 8, 2018: Curēus
https://www.readbyqxmd.com/read/29643809/examination-of-the-role-of-mitochondrial-morphology-and-function-in-the-cardioprotective-effect-of-sodium-nitrite-administered-24-h-before-ischemia-reperfusion-injury
#16
Vivien Demeter-Haludka, Mária Kovács, Alexandra Petrus, Roland Patai, Danina M Muntean, László Siklós, Ágnes Végh
Background: We have previous evidence that in anesthetized dogs the inorganic sodium nitrite protects against the severe ventricular arrhythmias, resulting from coronary artery occlusion and reperfusion, when administered 24 h before. The present study aimed to examine, whether in this effect changes in mitochondrial morphology and function would play a role. Methods: Thirty dogs were infused intravenously either with saline ( n = 15) or sodium nitrite (0.2 μmol/kg/min; n = 15) for 20 min, and 24 h later, 10 dogs from each group were subjected to a 25 min period of occlusion and then reperfusion of the left anterior descending coronary artery...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29643254/new-targets-for-old-drugs-cardiac-glycosides-inhibit-atrial-specific-k2p3-1-task-1-channels
#17
Constanze Schmidt, Felix Wiedmann, Anne-Rike Gaubatz, Antonius Ratte, Hugo A Katus, Dierk Thomas
Cardiac glycosides have been used in the treatment of arrhythmias for more than 200 years. Two-pore-domain (K2P) potassium channels regulate cardiac action potential repolarization. Recently, K2P3.1 (TASK-1) has been implicated in atrial fibrillation (AF) pathophysiology and was suggested as atrial-selective antiarrhythmic drug target. We hypothesized that blockade of cardiac K2P channels contributes to the mechanism of action of digitoxin and digoxin. All functional human K2P channels were screened for interactions with cardiac glycosides...
April 11, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29627871/autonomic-regulation-and-ventricular-arrhythmias
#18
REVIEW
Lingjin Meng, Kalyanam Shivkumar, Olujimi Ajijola
Autonomic nervous system (ANS) has a crucial role of regulating cardiac function in the physiological state and contributes to the pathogenesis of arrhythmias in the diseased state. The cardiac neuraxis consists of multiple feedback loops consisting of efferent and afferent limbs, mediating neurotransmission to and from the heart. Efferent parasympathetic neurotransmission is mediated by the vagus nerve, while paravertebral sympathetic ganglia relay efferent sympathetic neurotransmission to the heart. The association between autonomic activity and ventricular arrhythmias (VAs) has been studied extensively in both experimental models and humans...
April 7, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29624510/genetic-risk-stratification-in-cardiac-arrhythmias
#19
Carlo Napolitano, Andrea Mazzanti, Silvia G Priori
PURPOSE OF REVIEW: The current article provides a concise summary of the possibilities and limitations of genotype-based risk stratification of cardiac arrhythmias. We will outline the most important findings of the recent years in the light of their chronological and conceptual development. RECENT FINDINGS: Genotype-phenotype association studies in families with single-gene disorders as well as in the general population led to the discovery of several DNA variants significantly associated with the risk of sudden death or life-threatening arrhythmias...
April 4, 2018: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29623481/effect-of-antazoline-on-electrophysiological-properties-of-atrial-muscle-and-conduction-system-of-the-heart
#20
Bartłomiej Jacek Bińkowski, Marcin Makowski, Paweł Kubiński, Andrzej Lubiński
PURPOSE: Antazoline is a first-generation antihistaminic agent with additional anticholinergic properties and antiarrhythmic potential. Recent data shows its high effectiveness in sinus rhythm restoration among patients with paroxysmal atrial fibrillation. The effect of antazoline on electrophysiological parameters of the heart in vivo has not yet been examined. The aim of this study was to evaluate changes in electrophysiological parameters of the heart muscle and conduction system as a response to increasing doses of antazoline...
April 6, 2018: Cardiovascular Drugs and Therapy
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