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Moises Rodriguez-Gonzalez, Ana Castellano-Martinez
No abstract text is available yet for this article.
September 8, 2016: Indian Pediatrics
Seon Ah Cha, Jae Seung Yun, Tae Seok Lim, Yoon Goo Kang, Kang Min Lee, Ki Ho Song, Ki Dong Yoo, Yong Moon Park, Seung Hyun Ko, Yu Bae Ahn
BACKGROUND: We investigated an association between baseline heart rate-corrected QT (QTc) interval before severe hypoglycemia (SH) and prolongation of QTc interval during SH in patients with type 2 diabetes mellitus (T2DM). METHODS: Between January 2004 and June 2014, 208 patients with T2DM, who visited the emergency department because of SH and underwent standard 12-lead electrocardiography within the 6-month period before SH were consecutively enrolled. The QTc interval was analyzed during the incidence of SH, and 6 months before and after SH...
October 5, 2016: Diabetes & Metabolism Journal
Abdunoor M Kabanywanyi, Rita Baiden, Ali M Ali, Muhidin K Mahende, Bernhards R Ogutu, Abraham Oduro, Halidou Tinto, Margaret Gyapong, Ali Sie, Esperanca Sevene, Eusebio Macete, Seth Owusu-Agyei, Alex Adjei, Guillaume Compaoré, Innocent Valea, Isaac Osei, Abena Yawson, Martin Adjuik, Raymond Akparibo, Mwaka A Kakolwa, Salim Abdulla, Fred Binka
The antimalarial drug piperaquine is associated with delayed ventricular depolarization, causing prolonged QT interval (time taken for ventricular de-polarisation and re-polarisation). There is a lack of safety data regarding dihydroartemisinin/piperaquine (DHA/PPQ) for the treatment of uncomplicated malaria, which has limited its use. We created a platform where electrocardiograms (ECG) were performed in public hospitals for the safety assessment of DHA/PPQ, at baseline before the use of dihydroartemisinin/piperaquine (Eurartesim®), and on day 3 (before and after administration of the final dose) and day 7 post-administration...
2016: PloS One
Altuğ Ösken, Nizamettin Selçuk Yelgeç, Regayip Zehir, Tuğba Kemaloğlu Öz, Selçuk Yaylacı, Ramazan Akdemir, Hüseyin Gündüz
Drug-induced torsades de pointes (TdP) is a rare but potentially fatal adverse effect of commonly prescribed medications including cardiac and noncardiac drugs. Importantly, many drugs have been reported to cause the characteristic Brugada syndrome-linked electrocardiography (ECG) abnormalities and/or (fatal) ventricular tachyarrhythmias. Chlorpheniramine and propranolol have the arrhythmogenic effects reported previously. A review of literature revealed a large number of case reports of chlorpheniramine or propranolol use resulting in QTc prolongation, TdP, or both...
July 2016: Indian Journal of Pharmacology
Kaylin T Nguyen, Rachel A Gladstone, Jonathan W Dukes, Babak Nazer, Eric Vittinghoff, Nitish Badhwar, Vasanth Vedantham, Edward P Gerstenfeld, Byron K Lee, Randall J Lee, Zian H Tseng, Jeffrey E Olgin, Melvin M Scheinman, Gregory M Marcus
INTRODUCTION: Atrial refractoriness may be an important determinant of atrial fibrillation (AF) risk, but its measurement is not clinically accessible. Because the QT interval predicts incident AF and the atrium and ventricle share repolarizing ion currents, we investigated the association between an individual's QT interval and atrial effective refractory period (AERP). METHODS: In paroxysmal AF patients presenting for catheter ablation, the QT interval was measured from the surface 12-lead ECG...
October 18, 2016: Pacing and Clinical Electrophysiology: PACE
Ning Ma, Xiao-Yan Wu, Chang-Sheng Ma, Nian Liu, Rong Bai, Xin Du, Yan-Fei Ruan, Jian-Zeng Dong
Catheter ablation has been recommended as a treatment option for paroxysmal atrial fibrillation (PAF) patients complicated with type 2 diabetes mellitus (T2DM). PAF patients with T2DM have a higher recurrence rate after catheter ablation. Prolongation of corrected QT (QTc) interval has been linked to poor outcomes in T2DM patients. Whether the abnormal QTc interval is associated with the ablation outcome in the PAF patients with T2DM remains unknown. In this study, 134 PAF patients with T2DM undergoing primary catheter ablation were retrospectively enrolled...
October 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
Steven P Sears, Trevor W Getz, Christopher O Austin, William C Palmer, Evelyn A Boyd, Fernando F Stancampiano
BACKGROUND: Azithromycin has been associated with abnormalities of cardiac repolarization and development of torsades de pointes. Observational data suggest that the risk of death from cardiovascular causes is increased in patients taking azithromycin. Little is known regarding the risk of ventricular arrhythmia in patients with prolongation of the corrected QT interval who receive azithromycin. OBJECTIVE: The purpose of this study was to determine the incidence of sustained ventricular tachycardia in patients with prolonged corrected QT (QTc) who subsequently received azithromycin...
March 2016: Drugs—Real World Outcomes
Harmke Nijboer, Geert Lefeber, Alidair McLullich, Barbara van Munster
BACKGROUND: Haloperidol, frequently used for delirium, can lead to serious side effects, of which QTc prolongation is the most worrisome since it is associated with an increased risk of fatal cardiac arrhythmia. OBJECTIVES: The aim of this study was to measure the frequency of haloperidol use after procedures in patients aged ≥65 years in a hospital in the Netherlands. METHODS: This was a retrospective study among patients hospitalized in the Netherlands who were aged ≥65 years and who underwent a procedure between January 2008 and January 2009...
March 2016: Drugs—Real World Outcomes
S Gibiino, A Trappoli, B Balzarro, A R Atti, D De Ronchi
A 71-year-old man developed coma with severe respiratory failure, hypotension, and tachycardia induced by the intentional ingestion of quetiapine fumarate extended release (XR) 20 g. At the time, he had been treated for bipolar depression with venlafaxine 75 mg/day, lamotrigine 100 mg/day, pregabalin 75 mg/day, and quetiapine XR 400 mg/day for approximately 1 year. Comorbidities were hypertension treated with metoprolol, diabetes mellitus type 2 treated with metformin, and benign prostatic hyperplasia treated with silodosin...
December 2015: Drug Saf Case Rep
Akira Fujiki, Masao Sakabe
Objective Detecting paroxysmal atrial fibrillation in patients with ischemic stroke presenting in sinus rhythm is difficult because such episodes are often short, and they are also frequently asymptomatic. It is possible that the ventricular repolarization dynamics may reflect atrial vulnerability and cardioembolic stroke. Hence, we compared the QT-RR relation between cardioembolic stroke and atherosclerotic stroke during sinus rhythm. Methods The subjects comprised 62 consecutive ischemic stroke patients including 31 with cardioembolic strokes (71...
2016: Internal Medicine
Yuko Y Inoue, Bharath Ambale-Venkatesh, Nathan Mewton, Gustavo J Volpe, Yoshiaki Ohyama, Ravi K Sharma, Colin O Wu, Chia-Ying Liu, David A Bluemke, Elsayed Z Soliman, João A C Lima, Hiroshi Ashikaga
Purpose To examine the associations of myocardial diffuse fibrosis and scar with surface electrocardiographic (ECG) parameters in individuals free of prior coronary heart disease in four different ethnicities. Materials and Methods This prospective cross-sectional study was approved by the institutional review boards, and all participants gave informed consent. A total of 1669 participants in the Multi-Ethnic Study of Atherosclerosis, or MESA, who were free of prior myocardial infarction underwent both ECG and cardiac magnetic resonance imaging...
October 13, 2016: Radiology
Tal Lorberbaum, Kevin J Sampson, Jeremy B Chang, Vivek Iyer, Raymond L Woosley, Robert S Kass, Nicholas P Tatonetti
BACKGROUND: QT interval-prolonging drug-drug interactions (QT-DDIs) may increase the risk of life-threatening arrhythmia. Despite guidelines for testing from regulatory agencies, these interactions are usually discovered after drugs are marketed and may go undiscovered for years. OBJECTIVES: Using a combination of adverse event reports, electronic health records (EHR), and laboratory experiments, the goal of this study was to develop a data-driven pipeline for discovering QT-DDIs...
October 18, 2016: Journal of the American College of Cardiology
Julia H Indik, Vineet Nair, Ruslan Rafikov, Iwan S Nyotowidjojo, Jaskanwal Bisla, Mayank Kansal, Devang S Parikh, Melissa Robinson, Anand Desai, Megha Oberoi, Akash Gupta, Taimur Abbasi, Zain Khalpey, Amit R Patel, Roberto M Lang, Samuel C Dudley, Bum-Rak Choi, Joe G N Garcia, Roberto F Machado, Ankit A Desai
Sudden death is a leading cause of mortality in sickle cell disease, implicating ventricular tachyarrhythmias. Prolonged QTc on an electrocardiogram (ECG), commonly seen with myocardial ischemia, is a known risk for polymorphic ventricular tachycardia (VT). We hypothesized that prolonged QTc is associated with mortality in sickle cell disease. ECG were analyzed from a cohort of 224 sickle patients (University of Illinois at Chicago, UIC) along with available laboratory, and echocardiographic findings, and from another cohort of 38 patients (University of Chicago, UC) for which cardiac MRI and free heme values were also measured...
2016: PloS One
Ehud Chorin, Dan Hu, Charles Antzelevitch, Aviram Hochstadt, Luiz Belardinelli, David Zeltser, Hector Barajas-Martinez, Uri Rozovski, Raphael Rosso, Arnon Adler, Jesaia Benhorin, Sami Viskin
BACKGROUND: The basic defect in long-QT syndrome type III (LQT3) is an excessive inflow of sodium current during phase 3 of the action potential caused by mutations in the SCN5A gene. Most sodium channel blockers reduce the early (peak) and late components of the sodium current (INa and INaL), but ranolazine preferentially reduces INaL. We, therefore, evaluated the effects of ranolazine in LQT3 caused by the D1790G mutation in SCN5A. METHODS AND RESULTS: We performed an experimental study of ranolazine in TSA201 cells expressing the D1790G mutation...
October 2016: Circulation. Arrhythmia and Electrophysiology
Anasuya M, Ganesh Nayak S, C Ramachandra Bhat, Gopal Rao S
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
Damodhar Reddy Gouni, Gandiah P, Venkateshwarlu Nandyala P
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
Desheng Zhai, Yan Lang, Gaopan Dong, Yijun Liu, Xin Wang, Dushuang Zhou, Taizhen Cui, Yuxin Yang, Wenxi Zhang, Ying Zhao, Ruiling Zhang
Antipsychotic use is reported to be associated with a higher risk of sudden cardiac death and new users are especially susceptible to that risk. In this study, we focused on the ability of antipsychotics to prolong the QTc interval at the earliest stages of antipsychotic use. We employed a retrospective cohort study design in a naturalistic setting where having three ECG measurements over time (at baseline and after drug exposure) in antipsychotic-naïve, first-episode schizophrenia (FES) inpatients. The results revealed, in this relatively homogeneous, drug naïve FES patient sample, that QTc intervals were statistically significantly prolongated after a relatively short term (2-4weeks) of antipsychotic treatments, compared with baseline...
October 7, 2016: Schizophrenia Research
Lan Chi Vo, Christopher Snyder, Courtney McCracken, Christopher J McDougle, James T McCracken, Michael G Aman, Elaine Tierney, L Eugene Arnold, Daniel Levi, Michael Kelleman, Deirdre Carroll, John Morrissey, Benedetto Vitiello, Lawrence Scahill
OBJECTIVES: Risperidone is approved for the treatment of serious behavioral problems in children with autism spectrum disorder (ASD). This study examined the effects of risperidone on cardiac conduction in children with ASD. METHODS: Data were collected from an 8-week, five-site trial conducted by the Research Units on Pediatric Psychopharmacology Autism Network. Children (age 5-17 years) were randomly assigned to risperidone (n = 49) or placebo (n = 52) under double-blind conditions...
October 11, 2016: Journal of Child and Adolescent Psychopharmacology
Erik K Grasser, Barbara Ernst, Martin Thurnheer, Bernd Schultes
BACKGROUND: A shortening of electrocardiographic QT interval has been observed in obese subjects after weight loss, but previous results may have been biased by inappropriate heart rate (HR) correction. METHODS: Electrocardiography (ECG) recordings of 49 (35 females) severely obese patients before and 12 months after Roux-en-Y gastric bypass (RYGB) surgery were analysed. QT interval (QTc) was calculated by using four different equations, i.e. Bazett, Fridericia, Framingham and Hodges...
October 8, 2016: Obesity Surgery
Wijith Munasinghe, Sven Stodtmann, Anthony Tolcher, Emiliano Calvo, Michael Gordon, Mathilde Jalving, Judith de Vos-Geelen, Diane Medina, Dennis Bergau, Silpa Nuthalapati, David Hoffman, Stacie Shepherd, Hao Xiong
PURPOSE: Veliparib (ABT-888) is an orally bioavailable potent inhibitor of poly(ADP-ribose) polymerase (PARP)-1 and PARP-2. This phase 1 study evaluated the effect of veliparib on corrected QT interval using Fridericia's formula (QTcF). METHODS: Eligible patients with advanced solid tumors received single-dose oral veliparib (200 mg or 400 mg) or placebo in a 6-sequence, 3-period crossover design. The primary endpoint was the difference in the mean baseline-adjusted QTcF between 400 mg veliparib and placebo (∆∆QTcF) at six post-dose time points...
October 5, 2016: Cancer Chemotherapy and Pharmacology
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