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QTc prolongation

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https://www.readbyqxmd.com/read/28817488/risk-management-of-hospitalized-psychiatric-patients-taking-multiple-qtc-prolonging-drugs
#1
Eline Vandael, Bert Vandenberk, Rik Willems, Johan Reyntens, Joris Vandenberghe, Veerle Foulon
PURPOSE/BACKGROUND: Drug-related QTc prolongation has been linked with Torsade de Pointes and sudden cardiac death. The objective of this study was to investigate the impact of starting an additional QTc-prolonging drug on the QTc interval of psychiatric inpatients. METHODS: An observational study was performed between May 2011 and December 2014 in 6 Belgian psychiatric hospitals. Inpatients who were already taking 1 QTc-prolonging drug or more could be included in the study when an additional QTc-prolonging drug was started...
August 16, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28803378/qt-interval-prolongation-in-hospitalized-patients-on-cardiology-wards-a-prospective-observational-study
#2
Qasim Khan, Mohammad Ismail, Iqbal Haider, Inam Ul Haq, Sidra Noor
PURPOSE: Prolonged QT interval may lead to a lethal form of arrhythmia, torsades de pointes (TdP), which is associated with cardiovascular mortality. Therefore, we aimed to identify prevalence of QT interval prolongation, compare clinical characteristics of patients with normal and prolonged QT interval, and identify predictors of QT interval prolongation. METHODS: A prospective observational study was conducted in cardiology wards of two teaching hospitals in Pakistan...
August 12, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28800628/genome-wide-analysis-of-sotalol-induced-ikr-inhibition-during-ventricular-repolarization-generepol-study-lack-of-common-variants-with-large-effect-sizes
#3
Joe-Elie Salem, Marine Germain, Jean-Sébastien Hulot, Pascal Voiriot, Bruno Lebourgeois, Jean Waldura, David-Alexandre Tregouet, Beny Charbit, Christian Funck-Brentano
Many drugs used for non-cardiovascular and cardiovascular purposes, such as sotalol, have the side effect of prolonging cardiac repolarization, which can trigger life-threatening cardiac arrhythmias by inhibiting the potassium-channel IKr (KCNH2). On the electrocardiogram (ECG), IKr inhibition induces an increase in QTc and Tpeak-Tend (TpTe) interval and a decrease of T wave maximal amplitude (TAmp). These changes vary markedly between subjects, suggesting the existence of predisposing genetic factors. 990 healthy individuals, prospectively challenged with an oral 80mg sotalol dose, were monitored for changes in ventricular repolarization on ECG between baseline and 3 hours post dosing...
2017: PloS One
https://www.readbyqxmd.com/read/28799823/lack-of-qt-prolongation-for-2-o-methoxyethyl-modified-antisense-oligonucleotides-based-on-retrospective-exposure-response-analysis-of-ten-phase-1-dose-escalation-placebo-controlled-studies-in-healthy-subjects
#4
Rosie Z Yu, Rudy Gunawan, Richard S Geary, Steven G Hughes, Scott P Henry, Yanfeng Wang
The potential of QT prolongation of ten 2'-O-methoxyethyl-modified (2'-MOE) antisense oligonucleotides (ASOs) was evaluated retrospectively via exposure/response (ER) analysis using data from Phase 1 clinical studies in healthy subjects. All Phase 1 studies were double-blind, placebo-controlled, single and multiple ascending dose studies designed to assess the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics of the ASOs in healthy subjects. The active doses in these studies ranged from 50 to 450 mg administered by subcutaneous (SC) injection in single and multiple ascending dose cohorts...
August 11, 2017: Nucleic Acid Therapeutics
https://www.readbyqxmd.com/read/28797793/bpc-157-counteracts-qtc-prolongation-induced-by-haloperidol-fluphenazine-clozapine-olanzapine-quetiapine-sulpiride-and-metoclopramide-in-rats
#5
Dean Strinic, Zeljka Belosic Halle, Kresimir Luetic, Ana Nedic, Igor Petrovic, Mario Sucic, Gordana Zivanovic Posilovic, Dijana Balenovic, Sanja Strbe, Mario Udovicic, Domagoj Drmic, Mirjana Stupnisek, Martina Lovric Bencic, Sven Seiwerth, Predrag Sikiric
AIM: Commonly, neuroleptics and prokinetics induce a prolonged QTc interval. In this study, stable gastric pentadecapeptide BPC 157 counteracts the prolongation of the QTc interval in Wistar rats that underwent daily administration of dopamine neuroleptics or prokinetics. Previously, in rats and mice, BPC 157 counteracted neuroleptic-induced catalepsy and gastric ulcers. MAIN METHODS: To counteract neuroleptic- or prokinetic-induced prolongation of the QTc interval, rats were given a BPC 157 regimen once daily over seven days (10μg, 10ng/kg ip) immediately after each administrations of haloperidol (0...
August 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/28794082/loss-of-function-kcne2-variants-true-monogenic-culprits-of-long-qt-syndrome-or-proarrhythmic-variants-requiring-secondary-provocation
#6
Jason D Roberts, Andrew D Krahn, Michael J Ackerman, Ram K Rohatgi, Arthur J Moss, Babak Nazer, Rafik Tadros, Brenda Gerull, Shubhayan Sanatani, Yanushi D Wijeyeratne, Alban-Elouen Baruteau, Alison R Muir, Benjamin Pang, Julia Cadrin-Tourigny, Mario Talajic, Lena Rivard, David J Tester, Taylor Liu, Isaac R Whitman, Julianne Wojciak, Susan Conacher, Lorne J Gula, Peter Leong-Sit, Jaimie Manlucu, Martin S Green, Robert Hamilton, Jeff S Healey, Coeli M Lopes, Elijah R Behr, Arthur A Wilde, Michael H Gollob, Melvin M Scheinman
BACKGROUND: Insight into type 6 long-QT syndrome (LQT6), stemming from mutations in the KCNE2-encoded voltage-gated channel β-subunit, is limited. We sought to further characterize its clinical phenotype. METHODS AND RESULTS: Individuals with reported pathogenic KCNE2 mutations identified during arrhythmia evaluation were collected from inherited arrhythmia clinics and the Rochester long-QT syndrome (LQTS) registry. Previously reported LQT6 cases were identified through a search of the MEDLINE database...
August 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28791627/influence-of-intravenous-administration-of-the-antipsychotic-drug-benperidol-on-the-qt-interval
#7
Alexander Schmidt, Peter Fischer, Beate Wally, Joachim Scharfetter
A group effect is generally assumed regarding the prolongation of the QT interval through butyrophenone antipsychotics like haloperidol. Consequently intravenous administration of benperidol is seen critically notwithstanding sparse evidence; thus benperidol and haloperidol were compared regarding their cardiac risk of prolonging the QT interval when administered intravenously for acute sedation of psychotic patients. The QT interval was measured by a 12-lead ECG. For the correction of QT values Bazett's formula was used...
August 8, 2017: Neuropsychiatrie: Klinik, Diagnostik, Therapie und Rehabilitation
https://www.readbyqxmd.com/read/28783871/cardiac-safety-of-ozanimod-a-novel-sphingosine-1-phosphate-receptor-modulator-results-of-a-thorough-qt-qtc-study
#8
Jonathan Q Tran, Jeffrey P Hartung, Allan D Olson, Boaz Mendzelevski, Gregg A Timony, Marcus F Boehm, Robert J Peach, Sheila Gujrathi, Paul A Frohna
Ozanimod is a novel, selective, oral sphingosine-1-phosphate (1 and 5) receptor modulator in development for multiple sclerosis and inflammatory bowel disease. This randomized, double-blind, placebo-controlled, positive-controlled, parallel-group thorough QT study characterized the effects of ozanimod on cardiac repolarization in healthy subjects. Eligible subjects were randomized to 1 of 2 groups: ozanimod (escalated from 0.25 to 2 mg over 14 days) or placebo (for 14 days). A single dose of moxifloxacin 400 mg or placebo was administered on days 2 and 17...
August 7, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28782696/heritability-in-a-scn5a-mutation-founder-population-with-increased-female-susceptibility-to-non-nocturnal-ventricular-tachyarrhythmia-and-sudden-cardiac-death
#9
Rachel M A Ter Bekke, Aaron Isaacs, Andrei Barysenka, Marije B Hoos, Jan D H Jongbloed, Jan C A Hoorntje, Alfons S M Patelski, Apollonia T J M Helderman-van den Enden, Arthur van den Wijngaard, Monika Stoll, Paul G A Volders
BACKGROUND: Heritable cardiac sodium-channel dysfunction is associated with various arrhythmia syndromes, some predisposing to ventricular fibrillation. Phenotypic diversity among carriers of identical-by-descent mutations is often remarkable, suggesting influences of genetic modifiers. OBJECTIVE: We identified a unique SCN5A-mutation founder population with mixed clinical phenotypes and sudden cardiac death, and investigated the heritability of electromechanical traits besides the SCN5A-mutation effect...
August 3, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28776165/prolongation-of-the-qtc-interval-in-hiv-infected-individuals-compared-to-the-general-population
#10
Nico Reinsch, Marina Arendt, Marie Henrike Geisel, Christina Schulze, Volker Holzendorf, Anna Warnke, Till Neumann, Norbert H Brockmeyer, Dirk Schadendorf, Lewin Eisele, Raimund Erbel, Susanne Moebus, Karl-Heinz Jöckel, Stefan Esser
OBJECTIVES: Prolonged QT interval is associated with arrhythmias and sudden death. An increased prevalence of QT interval prolongation in human immunodeficiency virus-infected (HIV) subjects was previously described. The impact of different medications and HIV infection itself on the QT interval is rarely investigated in large HIV+ cohorts. METHODS: We compared QT interval measurement in 496 HIV(+) patients of the HIV-HEART study (HIVH) and 992 sex- and age-matched controls of the population-based German Heinz Nixdorf Recall study (HNR)...
August 3, 2017: Infection
https://www.readbyqxmd.com/read/28762916/-predictors-of-electrical-myocardial-instability-in-men-with-arterial-hypertension-and-obstructive-sleep-apnea-hypopnea-syndrome
#11
O V Lyshova, N V Borodin, I I Kostenko
OBJECTIVE: To access the detectability of corrected QT interval (QTc) prolongation ( more or equal 450 ms) and increased QT dispersion (QTd more or equal 60 ms) in men with obstructive sleep apnea-hypopnea syndrome (OSAS) and newly diagnosed arterial hypertension (AH). MATERIAL AND METHODS: We included in this study 138 men (mean age 40.5+/-6.9 years, body mass index 34.5+/-4.7 kg/m2, all with more or equal 3 risk factors of AH development, 34% with subclinical target organs damage)...
May 2017: Kardiologiia
https://www.readbyqxmd.com/read/28759086/assessment-of-myocardial-repolarisation-parameters-in-patients-with-familial-mediterranean-fever
#12
Kayihan Karaman, Metin Karayakali, Ertuğrul Erken, Ahmet Demirtaş, Mustafa Öztürk, Fatih Altunkaş, Arif Arisoy, Oğuzhan Ekrem Turan, Köksal Ceyhan, Ataç Çelik
BACKGROUND: Familial Mediterranean fever (FMF) is a chronic, recurrent auto-inflammatory disease characterised by self-terminating attacks of fever and sterile polyserositis. The main cause of death in auto-inflammatory diseases is cardiovascular events. Additionally, auto-inflammatory diseases have potential effects on the myocardial repolarisation parameters, including the T-wave peak-to-end (Tp-Te) interval, cTp-Te interval (corrected Tp-Te) and the cTp-Te/QT ratio. The aim of this study was to analyse the efficacy of myocardial repolarisation alterations in anticipation of cardiovascular risks in patients with FMF...
May 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28751432/severe-hypokalaemia-as-a-cause-of-acute-transient-quadriparesis
#13
Martin Bell Lybecker, Henrik Bjørnsgaard Madsen, Jens Meldgaard Bruun
Hypokalaemic paralysis covers a heterogeneous group of disorders caused either by an enhanced shift of potassium into the cells or following a significant renal or gastrointestinal loss of potassium. We present the case of a 48-year-old Caucasian man with paralysis of both upper and lower extremities. ECG showed sinus rhythm and characteristic changes of hypokalaemia with depression of the ST segment, prolonged QTc interval of 581ms and U waves seen as a small positive deflection at the T wave in the middle precordial leads...
July 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28749187/differential-methylation-of-lncrna-kcnq1ot1-promoter-polymorphism-was-associated-with-symptomatic-cardiac-long-qt
#14
Eliecer Coto, David Calvo, Julián R Reguero, César Morís, Jose M Rubín, Carmen Díaz-Corte, Helena Gil-Peña, Belén Alosno, Sara Iglesias, Juan Gómez
AIM: To investigate whether the differential methylation of KCNQ1OT1 was associated with the risk of symptomatic long QTc. PATIENTS & METHODS: We investigated the methylation status of KCNQ1OT1 in a cohort of patients (n = 131) with a symptomatic prolonged QTc. All the patients were genotyped for a common promoter polymorphism (rs11023840). They were also genotyped for DNA digested with the methylation-sensitive HpaII restriction enzyme. RESULTS: We found a significant higher frequency of AA genotype (p = 0...
July 27, 2017: Epigenomics
https://www.readbyqxmd.com/read/28748885/cardiac-status-in-children-with-acute-poststreptococcal-glomerulonephritis
#15
Tushar Idhate, Syed Ahmed Zaki, Preeti Shanbag
Acute poststreptococcal glomerulonephritis (PSGN) is the most common type of glomerulonephritis seen in children. It can affect multiple organs with heart being frequently involved. Yet, there are very few studies on cardiac status in children with PSGN and hence this study was conducted. All consecutive children from 1 month to 12 years of age, admitted over a two-year period with a diagnosis of PSGN, were included in the study. An electrocardiogram (ECG) and two-dimensional echocardiogram were performed in all patients on admission and repeated at six and 12 weeks, if abnormal...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28739492/efficacy-and-safety-of-citalopram-compared-to-atypical-antipsychotics-on-agitation-in-nursing-home-residents-with-alzheimer-dementia
#16
Giovanni Viscogliosi, Iulia Maria Chiriac, Evaristo Ettorre
OBJECTIVE: To assess efficacy and safety of citalopram compared to quetiapine and olanzapine for the treatment of agitation in patients with Alzheimer disease (AD). DESIGN: Longitudinal, 6-month study. SETTING: Nursing home (NH). PARTICIPANTS: 75 NH residents with AD and agitation, randomized to citalopram (n = 25), quetiapine (n = 25), or olanzapine (n = 25). MEASUREMENTS: Changes in Neuropsychiatric Inventory (NPI) agitation subscale score and the modified Alzheimer Disease Cooperative Study-Clinical Global Impression of Change (mADCS-CGIC) were used to assess treatment efficacy...
July 21, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28739032/comparison-and-validation-of-recommended-qt-interval-correction-formulas-for-predicting-cardiac-arrhythmias-in-patients-with-advanced-heart-failure-and-cardiac-resynchronization-devices
#17
Diego Iglesias-Álvarez, Moisés Rodríguez-Mañero, Francisco Javier García-Seara, Omar Kreidieh, José Luis Martínez-Sande, Belén Álvarez-Álvarez, Xesús Alberte Fernández-López, Laila González-Melchor, Ricardo Lage-Fernández, Isabel Moscoso-Galán, José Ramón González-Juanatey
QT interval prolongation is an important marker for the development of cardiac arrhythmias (CAs). Optimal methods to estimate QT/QTc intervals in patients with ventricular pacing (VP) and its correlation with CA have not been widely investigated. We aimed to validate the currently available formulas for QT determination during VP and to compare their abilities in predicting the occurrence of CA (atrial fibrillation [AF] and malignant ventricular arrhythmias [VAs] in patients with advanced heart failure and cardiac resynchronization therapy)...
June 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28730428/need-for-a-more-developmental-perspective-qtc-prolongation-under-psychotropic-medication
#18
EDITORIAL
Veit Roessner, Nicole Wolff, Stefan Ehrlich, Robert Waltereit
No abstract text is available yet for this article.
August 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28720088/sex-is-a-moderator-of-the-association-between-nos1ap-sequence-variants-and-qtc-in-two-long-qt-syndrome-founder-populations-a-pedigree-based-measured-genotype-association-analysis
#19
Annika Winbo, Eva-Lena Stattin, Ida Maria Westin, Anna Norberg, Johan Persson, Steen M Jensen, Annika Rydberg
BACKGROUND: Sequence variants in the NOS1AP gene have repeatedly been reported to influence QTc, albeit with moderate effect sizes. In the long QT syndrome (LQTS), this may contribute to the substantial QTc variance seen among carriers of identical pathogenic sequence variants. Here we assess three non-coding NOS1AP sequence variants, chosen for their previously reported strong association with QTc in normal and LQTS populations, for association with QTc in two Swedish LQT1 founder populations...
July 18, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28713157/population-pharmacokinetics-of-moxifloxacin-and-its-concentration-qt-interval-relationship-modeling-in-chinese-healthy-volunteers
#20
Feng-Yan Xu, Ji-Han Huang, Ying-Chun He, Li-Yu Liang, Lu-Jin Li, Juan Yang, Fang Yin, Ling Xu, Qing-Shan Zheng, Kun Wang
Moxifloxacin (MX) is an 8-methoxyquinolone antimicrobial drug, which is often used as a positive control in thorough QT (TQT) studies. In the present study we established the population pharmacokinetics model of MX and the relationship of MX concentrations with the QT and various corrected QT (QTc) intervals, and compared the results with other ethnicities. The MX data used for modeling were obtained from a published TQT interval prolongation study of antofloxacin with MX as the positive control. In this four-period crossover study, 24 adult Chinese healthy volunteers received either 200 or 400 mg of oral antofloxacin once daily, 400 mg of MX, or a placebo...
July 17, 2017: Acta Pharmacologica Sinica
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