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https://www.readbyqxmd.com/read/28073687/adverse-event-detection-using-the-fda-post-marketing-drug-safety-surveillance-system-cardiotoxicity-associated-with-loperamide-abuse-and-misuse
#1
Kimberley A Swank, Eileen Wu, Cindy Kortepeter, Jana McAninch, Robert L Levin
OBJECTIVE: The purpose of this investigation was to identify and characterize post-marketing reports of cardiotoxicity, including torsades de pointes (TdP), associated with loperamide use. METHODS: We searched the U.S. Food and Drug Administration Adverse Event Reporting System (FAERS) database for post-marketing reports of serious cardiac adverse events associated with loperamide use from December 28, 1976 (U.S. drug approval date), through December 14, 2015. We also conducted a Pubmed and Google Scholar search to identify additional published reports of cardiotoxicity associated with loperamide in the medical literature through February 11, 2016...
January 7, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28062741/dextrose-hypokalemia-and-torsade-de-pointes
#2
Pankaj Mathur, Sushilkumar S Gupta, Rajeswer Sarasam, Vinod Namana
No abstract text is available yet for this article.
January 5, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/28033168/is-cardiovascular-risk-a-concern-when-prescribing-azithromycin
#3
S Scott Sutton
The FDA has updated azithromycin package labeling to include the risk of prolonged cardiac repolarization and QT prolongation, which increase the possibility of cardiac dysrhythmias and torsades de pointes, especially in older adults. The update was initiated by a study that found an increased risk of death in patients taking azithromycin compared with those taking amoxicillin. However, cardiovascular results of other azithromycin studies have demonstrated discordant results, and more research is needed. In the meantime, providers should recognize that azithromycin has a role in the management of bacterial infections and should prescribe the antibiotic when warranted...
January 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28031851/a-good-excuse-for-skipping-the-test-electrical-storm-in-a-teenager
#4
Patrícia Rodrigues, António Pinheiro-Vieira, Marília Loureiro, Sílvia Álvares, Diana Anjo, Carla Roque, Maria João Sousa, Severo Torres
We describe the case of a teenager with a structurally normal heart that presented with torsades de pointes and cardiac arrest. He had a history of epilepsy in childhood, mild cognitive impairment and cognitive visual dysfunction. The baseline electrocardiogram had prominent J waves and a marked early repolarization pattern in all the leads, with normal QT interval. We discuss the differential diagnosis for this interesting case, as well as the patient's management.
December 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28019033/evidence-for-the-herg-liability-of-antihistamines-antipsychotics-and-anti-infective-agents-a-systematic-literature-review-from-the-aritmo-project
#5
REVIEW
Lorna Hazell, Emanuel Raschi, Fabrizio De Ponti, Simon H L Thomas, Francesco Salvo, Ernst Ahlberg Helgee, Scott Boyer, Miriam Sturkenboom, Saad Shakir
A systematic review was performed to categorize the hERG (human ether-a-go-go-related gene) liability of antihistamines, antipsychotics, and anti-infectives and to compare it with current clinical risk of torsade de pointes (TdP). Eligible studies were hERG assays reporting half-minimal inhibitory concentrations (IC50). A "hERG safety margin" was calculated from the IC50 divided by the peak human plasma concentration (free Cmax ). A margin below 30 defined hERG liability. Each drug was assigned an "uncertainty score" based on volume, consistency, precision, and internal and external validity of evidence...
December 26, 2016: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28018149/knowledge-gain-of-pharmacy-students-and-pharmacists-comparing-simulation-versus-traditional-learning-methodology
#6
Mary Grace Cravens, Kim Benner, Jennifer Beall, Mary Worthington, Brenda Denson, Amber Q Youngblood, J Lynn Zinkan, Nancy M Tofil
OBJECTIVES: The purpose of this study was to evaluate the difference between education via written materials alone and written materials enhanced with hands-on simulation. METHODS: A simulation case, educational module, and assessment regarding torsades de pointes (TdP) in an adolescent patient were designed. The written educational module was given to all study participants. A total of 92 third-year pharmacy students and 26 pharmacists participated in the study. RESULTS: When approximately half of the participants had been to simulation, an anonymous assessment was given...
November 2016: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
https://www.readbyqxmd.com/read/28012188/video-assisted-thoracoscopic-left-cardiac-sympathetic-denervation-in-patients-with-hereditary-ventricular-arrhythmias
#7
Se Yong Jang, Yongkeun Cho, Nam Kyun Kim, Chang-Yeon Kim, Jihyun Sohn, Jae-Hyung Roh, Myung Hwan Bae, Jang Hoon Lee, Dong Heon Yang, Hun Sik Park, Shung Chull Chae, Tak-Hyuk Oh, Gun Jik Kim
BACKGROUND: Left cardiac sympathetic denervation (LCSD) has been underutilized in patients with hereditary ventricular arrhythmia syndromes such as congenital long QT syndrome (LQTS) and catecholaminergic polymorphic ventricular tachycardia (CPVT). The purpose of this study was to investigate the safety and efficacy of video-assisted thoracoscopic (VATS) LCSD in such patients. METHODS: Fifteen patients (4 men, 24.6 ± 10.5 years old) who underwent VATS-LCSD between November 2010 and January 2015 for hereditary ventricular arrhythmia syndromes at Kyungpook National University Hospital were enrolled in this study...
December 24, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28012118/risk-factors-for-qtc-prolongation-systematic-review-of-the-evidence
#8
Eline Vandael, Bert Vandenberk, Joris Vandenberghe, Rik Willems, Veerle Foulon
Background QTc-interval prolongation has been associated with serious adverse events, such as Torsade de Pointes and sudden cardiac death. In the prevention of QTc-prolongation, special attention should go to high-risk patients. Aim of the review The aim of this review is to summarize and assess the evidence for different risk factors for QTc-prolongation (demographic factors, comorbidities, electrolytes, QTc-prolonging medication). Methods Potential studies were retrieved based on a systematic search of articles published until June 2015 in the databases Medline and Embase...
December 23, 2016: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28011953/hyperventilation-assists-proarrhythmia-development-during-delayed-repolarization-in-clofilium-treated-anaesthetized-mechanically-ventilated-rabbits
#9
H Papp, A Sarusi, A S Farkas, H Takacs, P Kui, D Vincze, E Ivany, A Varro, J G Papp, T Forster, A Farkas
Hyperventilation reduces partial pressure of CO2 (PCO2) in the blood, which results in hypokalaemia. Hypokalaemia helps the development of the life-threatening torsades de pointes type ventricular arrhythmia (TdP) evoked by repolarization delaying drugs. This implies that hyperventilation may assist the development of proarrhythmic events. Therefore, this study experimentally investigated the effect of hyperventilation on proarrhythmia development during delayed repolarization. Phenylephrine (an α1-adrenoceptor agonist) and clofilium (as a representative repolarization delaying agent inhibiting the rapid component of the delayed rectifier potassium current, IKr) were administered intravenously to pentobarbital-anaesthetized, mechanically ventilated, open chest rabbits...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27997898/mechanisms-of-iherg-ikr-modulation-by-%C3%AE-1-adrenoceptors-in-hek293-cells-and-cardiac-myocytes
#10
Janire Urrutia, Aintzane Alday, Mónica Gallego, L Layse Malagueta-Vieira, Ivan Arael Aréchiga-Figueroa, Oscar Casis, José Antonio Sánchez-Chapula
BACKGROUND: The rapid delayed rectifier K+ current (IKr), carried by the hERG protein, is one of the main repolarising currents in the human heart and a reduction of this current increases the risk of ventricular fibrillation. α1-adrenoceptors (α1-AR) activation reduces IKr but, despite the clear relationship between an increase in the sympathetic tone and arrhythmias, the mechanisms underlying the α1-AR regulation of the hERG channel are controversial. Thus, we aimed to investigate the mechanisms by which α1-AR stimulation regulates IKr...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27988172/-antiemetics-and-cardiac-effects-potentially-linked-to-prolongation-of-the-qt-interval-case-non-case-analysis-in-the-national-pharmacovigilance-database
#11
M Rochoy, M Auffret, J Béné, S Gautier
OBJECTIVES: Observational retrospective studies have linked domperidone and prolonged QT interval, ventricular arrhythmias and risk of sudden death. Since then, antiemetic prescription was applied to other molecules (including metopimazine). The aim of this study was to evaluate the profile of adverse cardiac effects associated with QT prolongation for each antiemetic available in France. METHODS: We conducted disproportionality analyses (case/non-case method), based on the observations recorded consecutively in the French national pharmacovigilance database between 2004 and 2013...
December 14, 2016: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/27977317/disproportionality-analysis-of-buprenorphine-transdermal-system-and-cardiac-arrhythmia-using-fda-and-who-postmarketing-reporting-system-data
#12
Nelson E Sessler, Ekaterina Walker, Harsha Chickballapur, James Kacholakalayil, Paul M Coplan
OBJECTIVE: Positive-controlled clinical studies have shown a dose dependent effect of buprenorphine transdermal system on QTc interval prolongation. This study provides assessment of the buprenorphine transdermal system and cardiac arrhythmia using US FDA and WHO postmarketing reporting databases. METHODS: Disproportionality analysis of spontaneously reported adverse events to assess whether the reporting rate of cardiac arrhythmia events was disproportionately elevated relative to expected rates of reporting in both FDA and WHO databases...
January 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/27956204/a-new-paradigm-for-drug-induced-torsadogenic-risk-assessment-using-human-ips-cell-derived-cardiomyocytes
#13
Hiroyuki Ando, Takashi Yoshinaga, Wataru Yamamoto, Keiichi Asakura, Takaaki Uda, Tomohiko Taniguchi, Atsuko Ojima, Raku Shinkyo, Kiyomi Kikuchi, Tomoharu Osada, Seiji Hayashi, Chieko Kasai, Norimasa Miyamoto, Hiroyuki Tashibu, Daiju Yamazaki, Atsushi Sugiyama, Yasunari Kanda, Kohei Sawada, Yuko Sekino
INTRODUCTION: Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) are anticipated to be a useful tool for conducting proarrhythmia risk assessments of drug candidates. However, a torsadogenic risk prediction paradigm using hiPSC-CMs has not yet been fully established. METHODS: Extracellular field potentials (FPs) were recorded from hiPSC-CMs using the multi-electrode array (MEA) system. The effects on FPs were evaluated with 60 drugs, including 57 with various clinical torsadogenic risks...
December 10, 2016: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/27923584/role-of-18f-fluorodeoxyglucose-positron-emission-tomography-imaging-to-demonstrate-resolution-of-acute-myocarditis
#14
Natasha Aleksova, Daniel Juneau, Alexander Dick, Martin Green, David Birnie, Rob S Beanlands, Pablo B Nery
A young woman experienced complete heart block, leading to Torsades de pointes. Cardiac 18F-fluorodeoxyglucose/positron emission tomography was used to confirm the resolution of her acute myocarditis and was critical to the decision-making process that prevented unnecessary pacemaker insertion.
August 20, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27923051/electrophysiological-characteristics-of-human-ipsc-derived-cardiomyocytes-for-the-assessment-of-drug-induced-proarrhythmic-potential
#15
Wataru Yamamoto, Keiichi Asakura, Hiroyuki Ando, Tomohiko Taniguchi, Atsuko Ojima, Takaaki Uda, Tomoharu Osada, Seiji Hayashi, Chieko Kasai, Norimasa Miyamoto, Hiroyuki Tashibu, Takashi Yoshinaga, Daiju Yamazaki, Atsushi Sugiyama, Yasunari Kanda, Kohei Sawada, Yuko Sekino
The aims of this study were to (1) characterize basic electrophysiological elements of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) that correspond to clinical properties such as QT-RR relationship, (2) determine the applicability of QT correction and analysis methods, and (3) determine if and how these in-vitro parameters could be used in risk assessment for adverse drug-induced effects such as Torsades de pointes (TdP). Field potential recordings were obtained from commercially available hiPSC-CMs using multi-electrode array (MEA) platform with and without ion channel antagonists in the recording solution...
2016: PloS One
https://www.readbyqxmd.com/read/27914889/ventricular-tachycardia-and-prolonged-qt-interval-presenting-as-seizure-like-activity-a-case-report
#16
Max Wentlandt, Stephen C Morris, Steven H Mitchell
Seizures can be difficult to distinguish from other causes of transient cerebral hypoxia in the emergency room. We present a case of seizure activity in a woman in whom EKG led to a diagnosis of intermittent monomorphic and polymorphic ventricular tachycardia (torsades de pointes), highlighting the need for careful consideration of alternative causes of seizures, even in patients with known epilepsy.
November 22, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27906148/in-brief-ppis-and-torsades-de-pointes
#17
(no author information available yet)
No abstract text is available yet for this article.
December 5, 2016: Medical Letter on Drugs and Therapeutics
https://www.readbyqxmd.com/read/27904744/qt-interval-prolongation-and-torsades-de-pointes-with-oxaliplatin
#18
Jules C Hancox, Rachel E Caves, Stéphanie C M Choisy, Andrew F James
No abstract text is available yet for this article.
December 2016: Therapeutic Advances in Drug Safety
https://www.readbyqxmd.com/read/27904611/selective-serotonin-reuptake-inhibitors-and-cardiovascular-events-a-systematic-review
#19
REVIEW
Mohammad Hassan Nezafati, Ali Eshraghi, Mohammad Vojdanparast, Saeed Abtahi, Pouya Nezafati
BACKGROUND: Given the importance of the role of depression in predicting the outcome of cardiovascular disorders, current medications for treating depression, particularly selective serotonin reuptake inhibitors (SSRIs), are taken into consideration. This study aimed to systematically review the published findings in the use of SSRIs and the risk for cardiac events. MATERIALS AND METHODS: An independent review of the Web of Science, PubMed, Scopus, Cochrane, CINAHL, index Copernicus, and Google Scholar, up to 2014, was performed...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27896662/investigating-the-additive-interaction-of-qt-prolonging-drugs-in-older-people-using-claims-data
#20
Andreas D Meid, Anna von Medem, Dirk Heider, Jürgen-Bernhard Adler, Christian Günster, Hanna M Seidling, Renate Quinzler, Hans-Helmut König, Walter E Haefeli
INTRODUCTION: Drugs that potentially prolong the QT interval carry the risk of life-threatening Torsades de pointes (TdP) ventricular arrhythmia. OBJECTIVE: The objective of this study was to investigate the potential additive risk for ventricular arrhythmia with concomitant prescriptions of QT-prolonging drugs. METHODS: Claims data for persons aged ≥65 years between 2010 and 2012 in Germany were analyzed and all cases hospitalized for ventricular arrhythmia were selected...
November 29, 2016: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
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