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Timothy KW, Bauer R, Larkin KA, Walsh EP, Abrams DJ, Corcia CG, Valsamakis A, Pitt GS, Dick IE, Golden A. A Natural History Study of Timothy Syndrome. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.05.20.24307583. [PMID: 38826393 PMCID: PMC11142284 DOI: 10.1101/2024.05.20.24307583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Timothy syndrome (OMIM #601005) is a rare disease caused by variants in the gene CACNA1C . Timothy syndrome patients were first identified as having a cardiac presentation of Long QT and syndactyly of the fingers and/or toes, and an identical variant in CACNA1C , Gly406Arg. However, since this original identification, more individuals harboring diverse variants in CACNA1C have been identified and have presented with various cardiac and extra-cardiac symptoms. Furthermore, it has remained underexplored whether individuals harboring canonical Gly406Arg variants in mutually exclusive exon 8A (Timothy syndrome 1) or exon 8 (Timothy syndrome 2) have additional symptoms. Here, we describe the first Natural History Study for Timothy syndrome, providing a thorough resource describing the current understanding of disease manifestation in Timothy syndrome patients. Parents of Timothy syndrome children were queried regarding a wide-ranging set of symptoms and features via a survey. Importantly, we find that in addition to cardiac concerns, Timothy syndrome patients commonly share extra-cardiac features including neurodevelopmental impairments, hypoglycemia, and respiratory problems. Our work expands the current understanding of the disorder to better inform the care of Timothy syndrome patients.
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Kohansal E, Naderi N, Fazelifar AF, Maleki M, Kalayinia S. Detection of a novel pathogenic variant in KCNH2 associated with long QT syndrome 2 using whole exome sequencing. BMC Med Genomics 2024; 17:126. [PMID: 38715010 PMCID: PMC11077719 DOI: 10.1186/s12920-024-01900-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 05/02/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Long QT syndrome (LQTS) is a cardiac channelopathy characterized by impaired myocardial repolarization that predisposes to life-threatening arrhythmias. This study aimed to elucidate the genetic basis of LQTS in an affected Iranian family using whole exome sequencing (WES). METHODS A 37-year-old woman with a personal and family history of sudden cardiac arrest and LQTS was referred for genetic study after losing her teenage daughter due to sudden cardiac death (SCD). WES was performed and variants were filtered and prioritized based on quality, allele frequency, pathogenicity predictions, and conservation scores. Sanger sequencing confirmed segregation in the family. RESULTS WES identified a novel heterozygous frameshift variant (NM_000238.4:c.3257_3258insG; pGly1087Trpfs*32) in the KCNH2 encoding the α-subunit of the rapid delayed rectifier potassium channel responsible for cardiac repolarization. This variant, predicted to cause a truncated protein, is located in the C-terminal region of the channel and was classified as likely pathogenic based on ACMG guidelines. The variant was absent in population databases and unaffected family members. CONCLUSION This study reports a novel KCNH2 frameshift variant in an Iranian family with LQTS, expanding the spectrum of disease-causing variants in this gene. Our findings highlight the importance of the C-terminal region in KCNH2 for proper channel function and the utility of WES in identifying rare variants in genetically heterogeneous disorders like LQTS. Functional characterization of this variant is warranted to fully elucidate its pathogenic mechanisms and inform personalized management strategies.
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Affiliation(s)
- Erfan Kohansal
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Niloofar Naderi
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Amir Farjam Fazelifar
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Maleki
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Samira Kalayinia
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran.
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Rebolledo‐Del Toro M, Carvajalino‐Galeano AB, Pinto‐Brito C, Muñoz‐Velandia OM, García‐Peña ÁA. Use of portable single-lead electrocardiogram device as an alternative for QTc monitoring in critically ill patients. Ann Noninvasive Electrocardiol 2024; 29:e13116. [PMID: 38627955 PMCID: PMC11021801 DOI: 10.1111/anec.13116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/13/2024] [Accepted: 03/24/2024] [Indexed: 04/19/2024] Open
Abstract
PURPOSE Acquired QT prolongation is frequent and leads to a higher mortality rate in critically ill patients. KardiaMobile 1L® (KM1L) is a portable, user-friendly single lead, mobile alternative to conventional 12-lead electrocardiogram (12-L ECG) that could be more readily available, potentially facilitating more frequent QTc assessments in intensive care units (ICU); however, there is currently no evidence to validate this potential use. METHODS We conducted a prospective diagnostic test study comparing QT interval measurement using KM1L with conventional 12-L ECG ordered for any reason in patients admitted to an ICU. We compared the mean difference using a paired t-test, agreement using Bland-Altman analysis, and Lin's concordance coefficient, numerical precision (proportion of QT measurements with <10 ms difference between KM1L and conventional 12-L ECG), and clinical precision (concordance for adequate discrimination of prolonged QTc). RESULTS We included 114 patients (61.4% men, 60% cardiovascular etiology of hospitalization) with 131 12-L ECG traces. We found no statistical difference between corrected QT measurements (427 ms vs. 428 ms, p = .308). Lin's concordance coefficient was 0.848 (95% CI 0.801-0.894, p = .001). Clinical precision was excellent in males and substantial in females (Kappa 0.837 and 0.781, respectively). Numerical precision was lower in patients with vasoactive drugs (-13.99 ms), QT-prolonging drugs (13.84 ms), antiarrhythmic drugs (-12.87 ms), and a heart rate (HR) difference of ≥5 beats per minute (bpm) between devices (-11.26 ms). CONCLUSION Our study validates the clinical viability of KM1L, a single-lead mobile ECG device, for identifying prolonged QT intervals in ICU patients. Caution is warranted in patients with certain medical conditions that may affect numerical precision.
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Affiliation(s)
- Martin Rebolledo‐Del Toro
- Division of CardiologyHospital Universitario San IgnacioBogotaColombia
- Department of Internal MedicinePontificia Universidad JaverianaBogotaColombia
| | | | | | - Oscar Mauricio Muñoz‐Velandia
- Department of Internal MedicinePontificia Universidad JaverianaBogotaColombia
- Department of Internal MedicineHospital Universitario San IgnacioBogotaColombia
| | - Ángel Alberto García‐Peña
- Division of CardiologyHospital Universitario San IgnacioBogotaColombia
- Department of Internal MedicinePontificia Universidad JaverianaBogotaColombia
- Department of Internal MedicineHospital Universitario San IgnacioBogotaColombia
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Weismann CG, Wedlund F, Ryd TL, von Wowern E, Hlebowicz J. Electrocardiographic proarrhythmic changes in pregnancy of women with CHD. Cardiol Young 2024:1-7. [PMID: 38465638 DOI: 10.1017/s1047951124000374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
OBJECTIVES Pregnancy-related physiological adaptations result in increased heart rate as well as electrocardiographic changes such as a mean QTc prolongation of 27 ms. Pregnant women with CHD are at increased risk for cardiovascular complications. The aim of this study was to identify risk factors for abnormally prolonged QTc interval-a risk factor for ventricular arrhythmias-in pregnant women with CHD. MATERIAL AND METHOD Retrospective longitudinal single-centre study. Pre-pregnancy demographic and electrocardiographic risk factors for abnormal QTc duration during pregnancy of (a) > 460 ms and (b) >27 ms increase were analyzed. RESULTS Eighty-three pregnancies in 63 women were included, of which three had documented arrhythmias. All five Modified World Health Organization Classification of Maternal Cardiovascular Risk (mWHO) classes were represented, with 15 pregnancies (18.1%) in mWHO class I, 26 (31.3%) in mWHO II, 28 (33.7%) in mWHO II-III, 11 (13.3%) in mWHO III, and three pregnancies (3.6%) in mWHO class IV. Heart rate and QTc interval increased, while QRS duration and PR interval shortened during pregnancy. QTc duration of > 460 ms was associated with increased pre-pregnancy QTc interval, QRS duration, and weight, as well as body mass index. QTc increase of > 27 ms was associated with increased heart rate prior to pregnancy. No significant associations of electrocardiographic changes with mWHO class or CHD type were identified. CONCLUSION Increased QTc in pregnant women with CHD was associated with being overweight or having higher heart rate, QRS, or QTc duration prior to pregnancy. These patients should be monitored closely for arrhythmias during pregnancy.
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Affiliation(s)
- Constance G Weismann
- Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Pediatric Cardiology, Lund University, Skåne University Hospital, Lund, Sweden
- Department of Pediatric Cardiology and Pediatric Intensive Care, Ludwig Maximilium University, Munich, Germany
| | - Frida Wedlund
- Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Cardiology, Skåne University Hospital, Lund University, Malmö, Sweden
| | | | - Emma von Wowern
- Deptartment of Obstetrics and Gynecology, Skåne University Hospital, Lund, Sweden
- Clinical Sciences Malmö, Lund University, Lund, Sweden
| | - Joanna Hlebowicz
- Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Cardiology, Skåne University Hospital, Lund University, Lund, Sweden
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Hamid AK, Pastor Arroyo EM, Calvet C, Hewitson TD, Muscalu ML, Schnitzbauer U, Smith ER, Wagner CA, Egli-Spichtig D. Phosphate Restriction Prevents Metabolic Acidosis and Curbs Rise in FGF23 and Mortality in Murine Folic Acid-Induced AKI. J Am Soc Nephrol 2024; 35:261-280. [PMID: 38189228 PMCID: PMC10914210 DOI: 10.1681/asn.0000000000000291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 12/02/2023] [Indexed: 01/09/2024] Open
Abstract
SIGNIFICANCE STATEMENT Patients with AKI suffer a staggering mortality rate of approximately 30%. Fibroblast growth factor 23 (FGF23) and phosphate (P i ) rise rapidly after the onset of AKI and have both been independently associated with ensuing morbidity and mortality. This study demonstrates that dietary P i restriction markedly diminished the early rise in plasma FGF23 and prevented the rise in plasma P i , parathyroid hormone, and calcitriol in mice with folic acid-induced AKI (FA-AKI). Furthermore, the study provides evidence for P i -sensitive osseous Fgf23 mRNA expression and reveals that P i restriction mitigated calciprotein particles (CPPs) formation, inflammation, acidosis, cardiac electrical disturbances, and mortality in mice with FA-AKI. These findings suggest that P i restriction may have a prophylactic potential in patients at risk for AKI. BACKGROUND In AKI, plasma FGF23 and P i rise rapidly and are independently associated with disease severity and outcome. METHODS The effects of normal (NP) and low (LP) dietary P i were investigated in mice with FA-AKI after 3, 24, and 48 hours and 14 days. RESULTS After 24 hours of AKI, the LP diet curbed the rise in plasma FGF23 and prevented that of parathyroid hormone and calcitriol as well as of osseous but not splenic or thymic Fgf23 mRNA expression. The absence of Pth prevented the rise in calcitriol and reduced the elevation of FGF23 in FA-AKI with the NP diet. Furthermore, the LP diet attenuated the rise in renal and plasma IL-6 and mitigated the decline in renal α -Klotho. After 48 hours, the LP diet further dampened renal IL-6 expression and resulted in lower urinary neutrophil gelatinase-associated lipocalin. In addition, the LP diet prevented the increased formation of CPPs. Fourteen days after AKI induction, the LP diet group maintained less elevated plasma FGF23 levels and had greater survival than the NP diet group. This was associated with prevention of metabolic acidosis, hypocalcemia, hyperkalemia, and cardiac electrical disturbances. CONCLUSIONS This study reveals P i -sensitive FGF23 expression in the bone but not in the thymus or spleen in FA-AKI and demonstrates that P i restriction mitigates CPP formation, inflammation, acidosis, and mortality in this model. These results suggest that dietary P i restriction could have prophylactic potential in patients at risk for AKI.
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Affiliation(s)
- Ahmad Kamal Hamid
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Swiss National Centre of Competence in Research (NCCR) Kidney.CH, Zurich, Switzerland
| | - Eva Maria Pastor Arroyo
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Swiss National Centre of Competence in Research (NCCR) Kidney.CH, Zurich, Switzerland
| | - Charlotte Calvet
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Zurich Integrative Rodent Physiology (ZIRP), University of Zurich, Zurich, Switzerland
| | - Timothy D. Hewitson
- Department of Nephrology, The Royal Melbourne Hospital, Melbourne, Australia
- Department of Medicine, University of Melbourne, Melbourne Australia
| | - Maria Lavinia Muscalu
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Swiss National Centre of Competence in Research (NCCR) Kidney.CH, Zurich, Switzerland
| | - Udo Schnitzbauer
- Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Edward R. Smith
- Department of Nephrology, The Royal Melbourne Hospital, Melbourne, Australia
- Department of Medicine, University of Melbourne, Melbourne Australia
| | - Carsten Alexander Wagner
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Swiss National Centre of Competence in Research (NCCR) Kidney.CH, Zurich, Switzerland
| | - Daniela Egli-Spichtig
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Swiss National Centre of Competence in Research (NCCR) Kidney.CH, Zurich, Switzerland
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Irrera F, Gumiero A, Zampogna A, Boscari F, Avogaro A, Gazzanti Pugliese di Cotrone MA, Patera M, Della Torre L, Picozzi N, Suppa A. Multisensor Integrated Platform Based on MEMS Charge Variation Sensing Technology for Biopotential Acquisition. SENSORS (BASEL, SWITZERLAND) 2024; 24:1554. [PMID: 38475089 DOI: 10.3390/s24051554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/25/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024]
Abstract
We propose a new methodology for long-term biopotential recording based on an MEMS multisensor integrated platform featuring a commercial electrostatic charge-transfer sensor. This family of sensors was originally intended for presence tracking in the automotive industry, so the existing setup was engineered for the acquisition of electrocardiograms, electroencephalograms, electrooculograms, and electromyography, designing a dedicated front-end and writing proper firmware for the specific application. Systematic tests on controls and nocturnal acquisitions from patients in a domestic environment will be discussed in detail. The excellent results indicate that this technology can provide a low-power, unexplored solution to biopotential acquisition. The technological breakthrough is in that it enables adding this type of functionality to existing MEMS boards at near-zero additional power consumption. For these reasons, it opens up additional possibilities for wearable sensors and strengthens the role of MEMS technology in medical wearables for the long-term synchronous acquisition of a wide range of signals.
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Affiliation(s)
- Fernanda Irrera
- Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00185 Rome, Italy
| | | | - Alessandro Zampogna
- Department of Human Neurosciences, Sapienza University of Rome, 00185 Rome, Italy
| | | | - Angelo Avogaro
- Department of Medicine, University of Padua, 35122 Padua, Italy
| | | | - Martina Patera
- Department of Human Neurosciences, Sapienza University of Rome, 00185 Rome, Italy
| | | | | | - Antonio Suppa
- Department of Human Neurosciences, Sapienza University of Rome, 00185 Rome, Italy
- IRCCS Neuromed, 86077 Pozzilli, Italy
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Klier K, Patel YJ, Schinköthe T, Harbeck N, Schmidt A. Corrected QT Interval (QTc) Diagnostic App for the Oncological Routine: Development Study. JMIR Cardio 2023; 7:e48096. [PMID: 37695655 PMCID: PMC10520775 DOI: 10.2196/48096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND Numerous antineoplastic drugs such as chemotherapeutics have cardiotoxic side effects and can lead to long QT syndrome (LQTS). When diagnosed and treated in time, the potentially fatal outcomes of LQTS can be prevented. Therefore, regular electrocardiogram (ECG) assessments are critical to ensure patient safety. However, these assessments are associated with patient discomfort and require timely support of the attending oncologist by a cardiologist. OBJECTIVE This study aimed to examine whether this approach can be made more efficient and comfortable by a smartphone app (QTc Tracker), supporting single-lead ECG records on site and transferring to a tele-cardiologist for an immediate diagnosis. METHODS To evaluate the QTc Tracker, it was implemented in 54 cancer centers in Germany. In total, 266 corrected QT interval (QTc) diagnoses of 122 patients were recorded. Moreover, a questionnaire on routine ECG workflow, turnaround time, and satisfaction (1=best, 6=worst) was answered by the centers before and after the implementation of the QTc Tracker. RESULTS Compared to the routine ECG workflow, the QTc Tracker enabled a substantial turnaround time reduction of 98% (mean 2.67, 95% CI 1.72-2.67 h) and even further time efficiency in combination with a cardiologic on-call service (mean 12.10, 95% CI 5.67-18.67 min). Additionally, nurses and patients reported higher satisfaction when using the QTc Tracker. In particular, patients' satisfaction sharply improved from 2.59 (95% CI 2.41-2.88) for the routine ECG workflow to 1.25 (95% CI 0.99-1.51) for the QTc Tracker workflow. CONCLUSIONS These results reveal a significant improvement regarding reduced turnaround time and increased user satisfaction. Best patient care might be guaranteed as the exposure of patients with an uncontrolled risk of QTc prolongations can be avoided by using the fast and easy QTc Tracker. In particular, as regular side-effect monitoring, the QTc Tracker app promises more convenience for patients and their physicians. Finally, future studies are needed to empirically test the usability and validity of such mobile ECG assessment methods. TRIAL REGISTRATION ClinicalTrials.gov NCT04055493; https://classic.clinicaltrials.gov/ct2/show/NCT04055493.
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Affiliation(s)
- Kristina Klier
- Institute of Sport Science, University of the Bundeswehr Munich, Neubiberg, Germany
| | | | - Timo Schinköthe
- CANKADO GmbH, Ottobrunn, Germany
- Research Center for Smart Digital Health, University of the Bundeswehr Munich, Neubiberg, Germany
| | - Nadia Harbeck
- Department of Gynecology and Obstetrics, Comprehensive Cancer Center of the Ludwig-Maximilians-University, Munich, Germany
| | - Annette Schmidt
- Institute of Sport Science, University of the Bundeswehr Munich, Neubiberg, Germany
- Research Center for Smart Digital Health, University of the Bundeswehr Munich, Neubiberg, Germany
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Michel H, Potapow A, Dechant MJ, Brandstetter S, Wellmann S, Köninger A, Melter M, Apfelbacher C, Kabesch M, Gerling S. Effect of QT interval-prolonging drugs taken in pregnancy on the neonatal QT interval. Front Pharmacol 2023; 14:1193317. [PMID: 37608894 PMCID: PMC10440430 DOI: 10.3389/fphar.2023.1193317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/18/2023] [Indexed: 08/24/2023] Open
Abstract
Introduction: Acquired QT interval prolongations due to drug side effects can result in detrimental arrhythmia. Maternal use of placenta-permeable drugs may lead to fetal exposure, thus leading to an increased risk of neonatal QT prolongation and arrhythmia. Objectives: This study aimed to evaluate the influence of maternal QT-prolonging medication on the neonatal QT interval. Methods: In the prospective KUNO-Kids health study, an ongoing population-based birth cohort, we classified maternal medications according to the known risk of QT interval prolongation. Effects on the neonatal QT interval were tested by linear regression analyses, correcting for perinatal confounders (birth weight, gestational age, birth mode, and age at ECG recording). Subgroup analyses were performed for selective serotonin reuptake inhibitors, proton pump inhibitors, and antihistamine dimenhydrinate. Logistic regression analysis was performed using a QTc of 450 ms as the cut-off value. Results: A total of 2,550 pregnant women received a total of 3,990 medications, of which 315 were known to increase the risk of QT prolongation, resulting in 105 (4.1%) neonates exposed in the last month of pregnancy. Overall, the mean age of the neonates at ECG was 1.9 days and the mean QTc (Bazett) was 414 ms. Univariate (regression coefficient -2.62, p = 0.288) and multivariate (regression coefficient -3.55, p = 0.146) regression analyses showed no significant effect of fetal medication exposure on the neonatal QT interval, neither in the overall nor in the subgroup analysis. Logistic regression analysis showed no association of exposure to maternal medication with an increased risk of neonatal QT interval prolongation (OR (odds ratio) 0.34, p = 0.14). Conclusion: The currently used maternal medication results in a relevant number of fetuses exposed to QT interval-prolonging drugs. In our cohort, exposure was found to have no effect on the neonatal QT interval.
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Affiliation(s)
- Holger Michel
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
| | - Antonia Potapow
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
| | - Markus-Johann Dechant
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
| | - Susanne Brandstetter
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
- Member of the Research and Development Campus Regensburg (WECARE), Hospital St. Hedwig of the Order of St. John, Regensburg, Germany
| | - Sven Wellmann
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
| | - Angela Köninger
- Clinic of Obstetrics and Gynecology St. Hedwig, University of Regensburg, Regensburg, Germany
| | - Michael Melter
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
- Member of the Research and Development Campus Regensburg (WECARE), Hospital St. Hedwig of the Order of St. John, Regensburg, Germany
| | - Christian Apfelbacher
- Institute of Social Medicine and Health Economics, University of Magdeburg, Magdeburg, Germany
| | - Michael Kabesch
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
- Member of the Research and Development Campus Regensburg (WECARE), Hospital St. Hedwig of the Order of St. John, Regensburg, Germany
| | - Stephan Gerling
- University Children’s Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of John, University of Regensburg, Regensburg, Germany
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Santin L, Verlato G, Tfaily A, Manera R, Zinfollino G, Fusina F, Lugoboni F. Methadone Maintenance and QT-Interval: Prevalence and Risk Factors-Is It Effective to Switch Therapy to Levomethadone? Biomedicines 2023; 11:2109. [PMID: 37626606 PMCID: PMC10452549 DOI: 10.3390/biomedicines11082109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/27/2023] Open
Abstract
Methadone is a chiral synthetic opioid primarily used to treat heroin and prescription-opioid addiction: the (R)-enantiomer (Levomethadone) activates the µ-opioid receptor more potently than the (S)-enantiomer, which is a more potent blocker of the hERG potassium channels, resulting in QTc prolongation. The purpose of this retrospective study was to assess the effect of methadone on the QTc interval and to investigate the benefits of Levomethadone. The electrocardiograms of 165 patients taking methadone at various dosages and for different periods of time were examined: the QTc value was manually measured and then adjusted using Bazett's formula. Data analysis revealed a linear association between the dosage of methadone and QTc length; no correlation was found between the QTc value and gender, age, or duration of therapy. In total, 14% of the sample (23 patients) showed a prolongation of the QTc interval (>470 ms in males and >480 ms in females); 10 of the 23 patients with QTc elongation underwent a change of therapy from Methadone to Levomethadone-in 90% of these patients, a normalization in the QTc length was established. This study confirmed the role of methadone, specifically its dosage, in QTc prolongation and the efficiency of Levomethadone as an adequate therapeutic substitute in these circumstances. This study validates the importance of careful electrocardiographic monitoring in methadone-treated patients.
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Affiliation(s)
- Laura Santin
- Addiction Unit, Department of Medicine, Verona University Hospital, 37134 Verona, Italy;
| | - Giuseppe Verlato
- Section of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, 37134 Verona, Italy; (G.V.); (A.T.)
| | - Ahmad Tfaily
- Section of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, 37134 Verona, Italy; (G.V.); (A.T.)
| | - Roberto Manera
- Addiction Department, ULSS 2, 31100 Treviso, Italy; (R.M.); (G.Z.)
| | | | - Francesca Fusina
- Padova Neuroscience Center, University of Padua, 35122 Padua, Italy;
| | - Fabio Lugoboni
- Addiction Unit, Department of Medicine, Verona University Hospital, 37134 Verona, Italy;
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10
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Mann H, Kusayev J, Pandey S, Aryal B, Solaimanzadeh I. A Rare Presentation of Levetiracetam-Induced Torsades De Pointes. Cureus 2023; 15:e40866. [PMID: 37492848 PMCID: PMC10365144 DOI: 10.7759/cureus.40866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2023] [Indexed: 07/27/2023] Open
Abstract
Torsades de pointes occurs in the presence of a prolonged QTc interval, which has many congenital and acquired causes. Levetiracetam is a widely used anti-epileptic medication secondary to its favorable safety profile. We present a rare case of a 59-year-old male who developed torsades de pointes and cardiac arrest after levetiracetam administration. To our knowledge, there is only one other case report documenting torsades de pointes after levetiracetam administration, and our case report will be the first documenting cardiac arrest after levetiracetam administration.
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Affiliation(s)
- Henry Mann
- Internal Medicine, One Brooklyn Health System Interfaith Medical Center, Brooklyn, USA
| | | | - Sagar Pandey
- Internal Medicine, One Brooklyn Health System Interfaith Medical Center, Brooklyn, USA
| | - Binit Aryal
- Internal Medicine, One Brooklyn Health System Interfaith Medical Center, Brooklyn, USA
| | - Isaac Solaimanzadeh
- Internal Medicine, One Brooklyn Health System Interfaith Medical Center, Brooklyn, USA
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11
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Foster A, Cancarevic I, Haseeb Ul Rasool M, Alashry M, Ghallab M, Ahmed N, Salam S, Munira M. Torsades De Pointes in a 71-Year-Old Female With Normal Qt Interval After Azithromycin Use. Cureus 2023; 15:e37653. [PMID: 37200638 PMCID: PMC10188217 DOI: 10.7759/cureus.37653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2023] [Indexed: 05/20/2023] Open
Abstract
A 71-year-old female visiting from Colombia presented to the emergency room with a productive cough, subjective fever, and chills for the past three days. Baseline EKG demonstrated a QT interval of 385 milliseconds with left ventricular hypertrophy and T wave inversions in leads V4, V5, and V6. Azithromycin was administered, and she was subsequently found to have torsades de pointes (TdP) on telemetry. In high-risk individuals, medications with reduced effects on cardiac conduction should be considered to avoid potentially lethal reactions. This case highlights the importance of clinical history prior to the administration of medications that have a propensity to cause abnormalities in cardiac conduction. Our patient had a grossly normal QT interval prior to the administration of azithromycin; however, she subsequently developed torsades de pointes. The patient was on telemetry monitoring, and cardiopulmonary resuscitation was quickly initiated as she was in a hospitalized setting; however, in an outpatient community setting, she likely would not have survived. By examining all the elements which contribute to QT prolongation, clinicians can have a deeper understanding of the complexities, particularly in individuals with multiple co-morbid conditions prior to the administration of medications that have a propensity to affect the QT interval.
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Affiliation(s)
- Allison Foster
- Internal Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA
| | - Ivan Cancarevic
- Internal Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA
| | | | - Mahmoud Alashry
- Internal Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA
| | - Muhammad Ghallab
- Internal Medicine, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA
| | - Nazaakat Ahmed
- Internal Medicine, Queens Hospital Center, New York City, USA
| | - Sanna Salam
- Medicine, Queens Hospital Center, New York City, USA
| | - Most Munira
- Cardilogy, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York City, USA
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12
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Ott WP, Bellamy SE, Khan M, Shahid A, Javed MT. Acquired Long QT Syndrome: Ventricular Fibrillation in an Otherwise Healthy Young Female. Cureus 2023; 15:e37263. [PMID: 37162788 PMCID: PMC10164407 DOI: 10.7759/cureus.37263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2023] [Indexed: 05/11/2023] Open
Abstract
Long QT syndrome (LQTS) occurs when there is an abnormality of myocardial repolarization characterized specifically by a prolonged QT interval on an electrocardiogram (ECG). This can be particularly dangerous as it is associated with an increased risk of polymorphic ventricular tachycardia and a life-threatening arrhythmia otherwise known as torsades de pointes (TdP). We present a case of a 40-year-old Indian female whose medical history was significant only for anemia and depression/anxiety that presented in a ventricular fibrillation cardiac arrest after becoming dyspneic and light-headed while dancing. Of relevance, she was taking sertraline 50mg once daily, a class of medications known to prolong the QT interval as well as having low serum calcium on presentation. Both her initial and subsequent electrocardiograms illuminated significantly prolonged QTc intervals. She subsequently sustained a ventricular tachycardia cardiac arrest, which degenerated into ventricular fibrillation in the cardiac intensive care unit two days later. Ultimately, the patient was pronounced brain-dead by the end of the week. We concluded this to be a case of LQTS predisposing to TdP, which then would degenerate into ventricular fibrillation. This case highlights multiple risk factors that are known to predispose to the aforementioned etiology. Further research is needed not only on common medications and their dose-dependent relationship on the QT interval across different ethnic groups but also on educating providers regarding multiple risk factors they may or may not have the power to control.
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Affiliation(s)
- William P Ott
- Internal Medicine, Jersey City Medical Center, Jersey City, USA
| | | | - Muzzamil Khan
- Internal Medicine, Jersey City Medical Center, Jersey City, USA
| | - Ahmad Shahid
- Internal Medicine, Jersey City Medical Center, Jersey City, USA
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13
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Delaunois A, Mathy F, Cornet M, Gryshkova V, Korlowski C, Bonfitto F, Koch J, Schlit A, Hebeisen S, Passini E, Rodriguez B, Valentin J. Testing the nonclinical Comprehensive In Vitro Proarrhythmia Assay (CiPA) paradigm with an established anti-seizure medication: Levetiracetam case study. Pharmacol Res Perspect 2023; 11:e01059. [PMID: 36748725 PMCID: PMC9903303 DOI: 10.1002/prp2.1059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 02/08/2023] Open
Abstract
Levetiracetam (LEV), a well-established anti-seizure medication (ASM), was launched before the original ICH S7B nonclinical guidance assessing QT prolongation potential and the introduction of the Comprehensive In Vitro Proarrhythmia Assay (CiPA) paradigm. No information was available on its effects on cardiac channels. The goal of this work was to "pressure test" the CiPA approach with LEV and check the concordance of nonclinical core and follow-up S7B assays with clinical and post-marketing data. The following experiments were conducted with LEV (0.25-7.5 mM): patch clamp assays on hERG (acute or trafficking effects), NaV 1.5, CaV 1.2, Kir 2.1, KV 7.1/mink, KV 1.5, KV 4.3, and HCN4; in silico electrophysiology modeling (Virtual Assay® software) in control, large-variability, and high-risk human ventricular cell populations; electrophysiology measurements in human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes and dog Purkinje fibers; ECG measurements in conscious telemetered dogs after single oral administration (150, 300, and 600 mg/kg). Except a slight inhibition (<10%) of hERG and KV 7.1/mink at 7.5 mM, that is, 30-fold the free therapeutic plasma concentration (FTPC) at 1500 mg, LEV did not affect any other cardiac channels or hERG trafficking. In both virtual and real human cardiomyocytes, and in dog Purkinje fibers, LEV induced no relevant changes in electrophysiological parameters or arrhythmia. No QTc prolongation was noted up to 2.7 mM unbound plasma levels in conscious dogs, corresponding to 10-fold the FTPC. Nonclinical assessment integrating CiPA assays shows the absence of QT prolongation and proarrhythmic risk of LEV up to at least 10-fold the FTPC and the good concordance with clinical and postmarketing data, although this does not exclude very rare occurrence of QT prolongation cases in patients with underlying risk factors.
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Affiliation(s)
| | | | - Miranda Cornet
- Development SciencesUCB Biopharma SRLBraine‐l'AlleudBelgium
| | | | | | | | - Juliane Koch
- Patient Safety, UCB Biosciences GmbHMonheimGermany
| | | | | | - Elisa Passini
- Department of Computer ScienceUniversity of OxfordOxfordUK
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14
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Muacevic A, Adler JR, Escabi-Mendoza J. Close Call From a Sweet Twist: A Case of Licorice-Induced Torsades De Pointes. Cureus 2023; 15:e34126. [PMID: 36843745 PMCID: PMC9949741 DOI: 10.7759/cureus.34126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/23/2023] [Indexed: 01/25/2023] Open
Abstract
Torsades de pointes (TdP) is a life-threatening cardiac arrhythmia that can result from QT interval prolongation, sometimes secondary to medication adverse effects and electrolyte derangements. We present a 95-year-old Hispanic male with advanced chronic kidney disease (CKD) that was evaluated for dizziness and progressive weakness. The diagnosis of severe symptomatic hypokalemia and QT prolongation was made, and the patient was admitted for telemetry monitoring and aggressive intravenous electrolyte replacements. While under observation, the patient experienced syncope due to ventricular tachycardia (VT) with episodes of torsades de pointes. Due to refractory potassium depletion and hypertension, workup for hyperaldosteronism revealed renal potassium wasting, inappropriately normal plasma renin levels, and almost undetectable aldosterone levels. Careful analysis revealed the excessive chronic daily ingestion of licorice-containing candy twists and tea, which may cause pseudohyperaldosteronism. Licorice is a commonly used natural product that is available in many forms. It is sometimes used as a natural supplement and as a sweetener that can be widely found in many food products. Excessive ingestion can lead to apparent mineralocorticoid excess, reduced plasma potassium, sodium retention, hypertension, and metabolic alkalosis. Hypokalemia can be severe in some patients and lead to fatal cardiac arrhythmias such as ventricular tachycardia and torsades de pointes. Careful analysis is essential in cases of refractive hypokalemia and renal potassium wasting, especially in elderly patients with underlying renovascular disease.
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15
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Torres Cruz L, Pulipaka SP, Anthony N, Liu J, Barkhodarian M, Al Awwa A, Weissman S. A Rare Case of Severe Hypokalemia and Hypomagnesemia due to Venetoclax and Polypharmacy Leading to Life-Threatening Cardiac Arrhythmias. Case Rep Oncol 2023; 16:1390-1394. [PMID: 38028575 PMCID: PMC10645436 DOI: 10.1159/000534135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 09/08/2023] [Indexed: 12/01/2023] Open
Abstract
Venetoclax is a novel agent used in hematologic malignancies. Although no long-term studies have directly implicated venetoclax, few studies show possible association with electrolyte abnormalities. Severe derangements in serum electrolyte levels can cause cardiac dysrhythmias, which can be potentially fatal. We present a case of venetoclax in association with the other medications causing life-threatening arrhythmias. Hypothesized mechanisms include damage to the distal tubules causing loss of potassium and magnesium. Our patient required modification of his medications and aggressive repletion of electrolytes with good outcomes. For patients on venetoclax, especially those with polypharmacy, caution should be exercised to prevent severe electrolyte derangements, which can lead to life-threatening arrhythmias.
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Affiliation(s)
- Laura Torres Cruz
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - Sai Priyanka Pulipaka
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - Neenu Anthony
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - James Liu
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - Maryam Barkhodarian
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - Ahmad Al Awwa
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
| | - Simcha Weissman
- Department of Internal Medicine, Hackensack Meridian Health, Palisades Medical Center, North Bergen, NJ, USA
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16
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Qubad M, Bittner RA. Second to none: rationale, timing, and clinical management of clozapine use in schizophrenia. Ther Adv Psychopharmacol 2023; 13:20451253231158152. [PMID: 36994117 PMCID: PMC10041648 DOI: 10.1177/20451253231158152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/24/2023] [Indexed: 03/31/2023] Open
Abstract
Despite its enduring relevance as the single most effective and important evidence-based treatment for schizophrenia, underutilization of clozapine remains considerable. To a substantial degree, this is attributable to a reluctance of psychiatrists to offer clozapine due to its relatively large side-effect burden and the complexity of its use. This underscores the necessity for continued education regarding both the vital nature and the intricacies of clozapine treatment. This narrative review summarizes all clinically relevant areas of evidence, which support clozapine's wide-ranging superior efficacy - for treatment-resistant schizophrenia (TRS) and beyond - and make its safe use eminently feasible. Converging evidence indicates that TRS constitutes a distinct albeit heterogeneous subgroup of schizophrenias primarily responsive to clozapine. Most importantly, the predominantly early onset of treatment resistance and the considerable decline in response rates associated with its delayed initiation make clozapine an essential treatment option throughout the course of illness, beginning with the first psychotic episode. To maximize patients' benefits, systematic early recognition efforts based on stringent use of TRS criteria, a timely offer of clozapine, thorough side-effect screening and management as well as consistent use of therapeutic drug monitoring and established augmentation strategies for suboptimal responders are crucial. To minimize permanent all-cause discontinuation, re-challenges after neutropenia or myocarditis should be considered. Owing to clozapine's unique efficacy, comorbid conditions including substance use and most somatic disorders should not dissuade but rather encourage clinicians to consider clozapine. Moreover, treatment decisions need to be informed by the late onset of clozapine's full effects, which for reduced suicidality and mortality rates may not even be readily apparent. Overall, the singular extent of its efficacy combined with the high level of patient satisfaction continues to distinguish clozapine from all other available antipsychotics.
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Affiliation(s)
- Mishal Qubad
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
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17
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Frequency of QTc Interval Prolongation in Children and Adults with Williams Syndrome. Pediatr Cardiol 2022; 43:1559-1567. [PMID: 35366065 DOI: 10.1007/s00246-022-02883-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 03/21/2022] [Indexed: 12/19/2022]
Abstract
QTc prolongation (≥ 460 ms), according to Bazett formula (QTcB), has been identified to be increased in Williams syndrome (WS) and suggested as a potential cause of increased risk of sudden cardiac death. The Bazett formula tends to overestimate QTc in higher heart rates. We performed a retrospective chart review of WS patients with ≥ 1 electrocardiogram (EKG) with sinus rhythm, no evidence of bundle branch blocks, and measurable intervals. A total of 280 EKGs from 147 patients with WS were analyzed and 123 EKGs from 123 controls. The QTc was calculated using Bazett formula. The average QTcB for individuals with WS and controls was 444 ± 24 ms and 417 ± 26 ms, respectively (p < 0.001). In our WS cohort 34.4% had at least 1 EKG with a QTcB ≥ 460 ms. The mean heart rate (HR) from patients with WS was significantly higher than controls (96 bpm vs 76 bpm, p < 0.001). Linear regression showed that HR contributed 27% to QTcB prolongation in the patients with WS. Patients with WS have a mean QTcB in the normal range but higher than controls, and a higher than expected frequency of QTc ≥ 460 ms compared to the general population. HR is also higher in WS and contributes modestly to the WS QTcB prolongation. Future studies are needed to assess if these findings contribute risk to sudden cardiac death but in the interim we recommend routine EKG testing, especially when starting QTc prolonging medications.
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18
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Cerebral Seizures in an Adolescent with Jervell and Lange-Nielsen Syndrome: It May Not Be Epilepsy. Clin Pract 2022; 12:677-685. [PMID: 36136864 PMCID: PMC9498825 DOI: 10.3390/clinpract12050070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/18/2022] [Accepted: 08/23/2022] [Indexed: 12/02/2022] Open
Abstract
A 13-year-old girl with Jervell and Lange-Nielsen syndrome associated congenital long QT syndrome (LQTS) and central deafness was admitted for generalized seizures. LQTS had been diagnosed after birth and confirmed at genetic testing. β-blocker treatment was immediately started. Despite this, since the age of 12 months, recurrent cerebral seizures occurred leading to the diagnosis of epilepsy. Anti-convulsive therapy was initiated but without success. At the last admission, nadolol dosage seemed infratherapeutic. Considering malignant ventricular arrhythmias as the cause of seizures, the β-blocker dosage was adjusted to weight and levels of magnesium and potassium optimized. Furthermore, the patient received an implantable Medtronic Reveal LINQ Recorder®. Since then, the adolescent has been asymptomatic with no arrhythmia documented. LQTS is due to one or more mutations of genes coding for ion channels. It may induce malignant ventricular arrhythmias and is a major cause of sudden cardiac death in children. Generalized cerebral seizures are extra-cardiac manifestations caused by decreased cerebral perfusion during ventricular arrhythmia. They are commonly misinterpreted as manifestations of epilepsy. For any patient with known or unknown LQTS who presents seizures with resistance to anti-convulsive therapy, a cardiac electrophysiological investigation should be performed promptly to ensure etiological diagnosis and optimize treatment.
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19
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Liu M, Yang Y, Zhang M, Xue Y, Zheng B, Zhang Y, Liu Y, Chu X, Sun Z, Han X. Inhibition of human ether-à-go-go-related gene K+ currents expressed in HEK293 cells by three gingerol components from ginger. J Pharm Pharmacol 2022; 74:1133-1139. [PMID: 35511715 DOI: 10.1093/jpp/rgac029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 04/04/2022] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Gingerols are bioactive compounds derived from ginger, our experiment investigates the effects of 6-, 8- and 10-Gin on the human ether-à-go-go-related gene (hERG) K+ channels by using patch clamp technology. KEY FINDINGS hERG K+ currents were suppressed by 6-, 8- and 10-Gin in a concentration-dependent manner. The IC50 values of 6-, 8- and 10-Gin were 41.5, 16.1 and 86.5 μM for the hERG K+ currents, respectively. The maximum inhibitory effects caused by 6-, 8- and 10-Gin were 44.3% ± 2.0%, 88.6% ± 1.3% and 63.1% ± 1.1%, respectively, and the effects were almost completely reversible. CONCLUSION These findings suggest that 8-Gin is the most potent hERG K+ channel inhibitor among gingerol components and may offer a new approach for understanding and treating cancer.
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Affiliation(s)
- Miaomaio Liu
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Yakun Yang
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Muqing Zhang
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Yucong Xue
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Bin Zheng
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Yuanyuan Zhang
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Yu Liu
- School of Pharmacy, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Xi Chu
- The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Zhenqing Sun
- Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser hospital), Qingdao, Shandong, China
| | - Xue Han
- Affiliated Hospital, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
- Hebei Key Laboratory of Integrative Medicine on Liver-Kidney Patterns, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
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20
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El Harchi A, Brincourt O. Pharmacological activation of the
hERG
K
+
channel for the management of the long
QT
syndrome: A review. J Arrhythm 2022; 38:554-569. [PMID: 35936037 PMCID: PMC9347208 DOI: 10.1002/joa3.12741] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/28/2022] [Accepted: 05/16/2022] [Indexed: 11/10/2022] Open
Abstract
In the human heart, the rapid delayed rectifier K+ current (IKr) contributes significantly to ventricular action potential (AP) repolarization and to set the duration of the QT interval of the surface electrocardiogram (ECG). The pore‐forming (α) subunit of the IKr channel is encoded by KCNH2 or human ether‐à‐go‐go‐related gene 1 (hERG1). Impairment of hERG function through either gene mutation (congenital) or pharmacological blockade by diverse drugs in clinical use (acquired) can cause a prolongation of the AP duration (APD) reflected onto the surface ECG as a prolonged QT interval or Long QT Syndrome (LQTS). LQTS can increase the risk of triggered activity of ventricular cardiomyocytes and associated life‐threatening arrhythmia. Current treatments all focus on reducing the incidence of arrhythmia or terminating it after its onset but there is to date no prophylactic treatment for the pharmacological management of LQTS. A new class of hERG modulators (agonists) have been suggested through direct interaction with the hERG channel to shorten the action potential duration (APD) and/or increase the postrepolarisation refractoriness period (PRRP) of ventricular cardiomyocytes protecting thereby against triggered activity and associated arrhythmia. Although promising drug candidates, there remain major obstacles to their clinical development. The aim of this review is to summarize the latest advances as well as the limitations of this proposed pharmacotherapy.
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Affiliation(s)
- Aziza El Harchi
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building University of Bristol, University Walk Bristol UK
| | - Oriane Brincourt
- School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences Building University of Bristol, University Walk Bristol UK
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21
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Xue H, Li Y, Zhao Z, Ren J, Yu W, Wang F, Li X, Li J, Xia Q, Zhang Y, Li B. Deacetylation mechanism and potential reversal strategy of long QT syndrome on hERG K + channel under hypoxia. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166487. [PMID: 35840042 DOI: 10.1016/j.bbadis.2022.166487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 11/30/2022]
Abstract
Clinically, hypoxia is a major risk factor for long QT syndrome (LQTS), which is associated with many diseases, such as myocardial ischemia. LQTS can be caused by the deficiency of hERG, a potassium ion channel that plays a key role in cardiac repolarization. Modifications such as acetylation of histones or non-histone proteins can affect the protein expression. In the present study, we explored the mechanism underlying hypoxia-induced LQTS and a potential reversal strategy. Experiments were performed under hypoxia to determine transcriptional and post-transcriptional expression changes. We used real-time PCR, chromatin immunoprecipitation assay, and western blotting to determine the histones acetylation in the hERG gene and the mechanism. Molecular docking, western blotting, IP, and patch -clamp assay were performed to determine the acetylation and ubiquitination levels of hERG protein and the mechanism. hERG mRNA and protein expression were found to decrease under hypoxia. The histone deacetylation level increased under hypoxia at both H3K27 and H4 of the hERG gene. HDAC1 and HDAC2 are the key enzymes for the mechanism. HDAC6 directly interacts with hERG. The acetylation level of hERG decreased and the ubiquitination level of hERG increased under hypoxia. The inhibitors of HDAC1, HDAC2, and HDAC6 could reverse the reduction of hERG mRNA and hERG protein expression under hypoxia. In conclusion, deacetylation of hERG gene-associated histones and hERG protein might be the mechanisms for LQTS in patients with hypoxia, and the inhibition of HDAC1, HDAC2, and HDAC6 might be a promising reversal strategy for reducing hERG expression under different pathological conditions.
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Affiliation(s)
- Hui Xue
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yuexin Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Zhengrong Zhao
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jiacheng Ren
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Wenting Yu
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Fang Wang
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xianghua Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jiaxin Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Qianqian Xia
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yuxin Zhang
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China
| | - Baoxin Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, China.
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22
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Isakadze N, Engels MC, Beer D, McClellan R, Yanek LR, Mondaloo B, Hays AG, Metkus TS, Calkins H, Barth AS. C-reactive Protein Elevation Is Associated With QTc Interval Prolongation in Patients Hospitalized With COVID-19. Front Cardiovasc Med 2022; 9:866146. [PMID: 35811700 PMCID: PMC9261932 DOI: 10.3389/fcvm.2022.866146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 04/28/2022] [Indexed: 12/27/2022] Open
Abstract
Background The relationship between inflammation and corrected QT (QTc) interval prolongation is currently not well defined in patients with COVID-19. Objective This study aimed to assess the effect of marked interval changes in the inflammatory marker C-reactive protein (CRP) on QTc interval in patients hospitalized with COVID-19. Methods In this retrospective cohort study of hospitalized adult patients admitted with COVID-19 infection, we identified 85 patients who had markedly elevated CRP levels and serial measurements of an ECG and CRP during the same admission. We compared mean QTc interval duration, and other clinical and ECG characteristics between times when CRP values were high and low. We performed mixed-effects linear regression analysis to identify associations between CRP levels and QTc interval in univariable and adjusted models. Results Mean age was 58 ± 16 years, of which 39% were women, 41% were Black, and 25% were White. On average, the QTc interval calculated via the Bazett formula was 15 ms higher when the CRP values were “high” vs. “low” [447 ms (IQR 427–472 ms) and 432 ms (IQR 412–452 ms), respectively]. A 100 mg/L increase in CRP was associated with a 1.5 ms increase in QTc interval [β coefficient 0.15, 95% CI (0.06–0.24). In a fully adjusted model for sociodemographic, ECG, and clinical factors, the association remained significant (β coefficient 0.14, 95% CI 0.05–0.23). Conclusion An interval QTc interval prolongation is observed with a marked elevation in CRP levels in patients with COVID-19.
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Affiliation(s)
- Nino Isakadze
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Marc C. Engels
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Dominik Beer
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Rebecca McClellan
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lisa R. Yanek
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Bahareh Mondaloo
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Allison G. Hays
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Thomas S. Metkus
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Hugh Calkins
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Andreas S. Barth
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- *Correspondence: Andreas S. Barth
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Morrow RL, Mintzes B, Souverein PC, Hallgreen CE, Ahmed B, Roughead EE, De Bruin ML, Kristiansen SB, Lexchin J, Kemp-Casey A, Sketris I, Mangin D, Pearson SA, Puil L, Lopert R, Bero L, Gnjidic D, Sarpatwari A, Dormuth CR. Hydroxyzine Initiation Following Drug Safety Advisories on Cardiac Arrhythmias in the UK and Canada: A Longitudinal Cohort Study. Drug Saf 2022; 45:623-638. [PMID: 35438459 PMCID: PMC9189086 DOI: 10.1007/s40264-022-01175-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2022] [Indexed: 12/20/2022]
Abstract
Introduction Regulatory advisories on hydroxyzine and risk of QT prolongation and Torsade de pointes (TdP) were issued in the UK in April 2015 and Canada in June 2016. We hypothesized patients with risk factors for QT prolongation and TdP, compared with those without risk factors, would be less likely to initiate hydroxyzine in the UK and in British Columbia (BC), Canada, following advisories. Methods We conducted a longitudinal study with repeated measures, and evaluated hydroxyzine initiation in a UK cohort and a concurrent BC control cohort (April 2013–March 2016) as well as in a BC advisory cohort (June 2014–May 2017). Results This study included 247,665 patients in the UK cohort, 297,147 patients in the BC control cohort, and 303,653 patients in the BC advisory cohort. Over a 12-month post-advisory period, hydroxyzine initiation decreased by 21% in the UK (rate ratio 0.79, 95% confidence interval 0.66–0.96) relative to the expected level of initiation based on the pre-advisory trend. Hydroxyzine initiation did not change in the BC control cohort or following the Canadian advisory in the BC advisory cohort. The decrease in hydroxyzine initiation in the UK in the 12 months after the advisories was not significantly different for patients with risk factors compared with those without risk factors. Conclusion Hydroxyzine initiation decreased in the UK, but not in BC, in the 12 months following safety advisories. The decrease in hydroxyzine initiation in the UK was not significantly different for patients with versus without risk factors for QT prolongation and TdP. Supplementary Information The online version contains supplementary material available at 10.1007/s40264-022-01175-2.
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Affiliation(s)
- Richard L Morrow
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, 210-1110 Government St., Victoria, BC, V8W 1Y2, Canada.
| | - Barbara Mintzes
- Faculty of Medicine and Health and Charles Perkins Centre, School of Pharmacy, University of Sydney, Sydney, NSW, Australia
| | - Patrick C Souverein
- Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Christine E Hallgreen
- Department of Pharmacy, Faculty of Health and Medical Sciences, Copenhagen Centre for Regulatory Science, University of Copenhagen, Copenhagen, Denmark
| | - Bilal Ahmed
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, 210-1110 Government St., Victoria, BC, V8W 1Y2, Canada
| | - Elizabeth E Roughead
- Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Marie L De Bruin
- Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
- Department of Pharmacy, Faculty of Health and Medical Sciences, Copenhagen Centre for Regulatory Science, University of Copenhagen, Copenhagen, Denmark
| | - Sarah Brøgger Kristiansen
- Department of Drug Design and Pharmacology, Pharmacovigilance Research Center, University of Copenhagen, Copenhagen, Denmark
| | - Joel Lexchin
- Faculty of Health, York University, Toronto, ON, Canada
| | - Anna Kemp-Casey
- Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Ingrid Sketris
- Department of Community Health and Epidemiology, Dalhousie University, Halifax, NS, Canada
| | - Dee Mangin
- Department of Family Medicine, McMaster University, Hamilton, ON, Canada
| | - Sallie-Anne Pearson
- Faculty of Medicine, Centre for Big Data Research in Health, University of New South Wales, Sydney, NSW, Australia
| | - Lorri Puil
- Faculty of Medicine, School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Ruth Lopert
- Department of Health Policy and Management, George Washington University, Washington, DC, USA
| | - Lisa Bero
- School of Medicine and Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Danijela Gnjidic
- Faculty of Medicine and Health and Charles Perkins Centre, School of Pharmacy, University of Sydney, Sydney, NSW, Australia
| | - Ameet Sarpatwari
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Colin R Dormuth
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, 210-1110 Government St., Victoria, BC, V8W 1Y2, Canada
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Affiliation(s)
- Victor A. Abrich
- Department of Cardiology, MercyOne Waterloo Medical Center, Waterloo, Iowa
- Address reprint requests and correspondence: Dr Victor A. Abrich, MercyOne Waterloo Heart Care, 2710 St. Francis Dr, Ste 320, Waterloo, IA 50702.
| | - Brian Olshansky
- Department of Cardiology, MercyOne Waterloo Medical Center, Waterloo, Iowa
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Tranchina K, Matlock D, Hernandez C, Turgeon J, Bingham JM. Mitigating Benzodiazepine Dependence and the Risk of Drug-Induced QTc Prolongation in the Treatment of Gastroparesis: A Case Report. Medicina (B Aires) 2022; 58:medicina58030409. [PMID: 35334585 PMCID: PMC8951483 DOI: 10.3390/medicina58030409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/24/2022] [Accepted: 03/02/2022] [Indexed: 12/03/2022] Open
Abstract
Patients are often faced with challenges when it comes to safe therapeutic options. An 89-year-old female with a history of arrhythmias and refractory gastroparesis complained of adverse drug events from her benzodiazepine. While performing a comprehensive medication review and a medication safety review using an advanced clinical decision support system, the pharmacist successfully tapered off the benzodiazepine to a safer alternative antidepressant indicated for the treatment of gastroparesis. Special attention was given to selecting drugs with less QT prolongation risk, based on her age, current drug regimen, previous medical history, and presence of polypharmacy.
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Affiliation(s)
- Karley Tranchina
- College of Pharmacy, University of Arizona, Tucson, AZ 85721, USA;
| | - Derek Matlock
- MedWiseRx, 100 N Stone Ave., Tucson, AZ 85701, USA; (D.M.); (C.H.)
| | - Carlos Hernandez
- MedWiseRx, 100 N Stone Ave., Tucson, AZ 85701, USA; (D.M.); (C.H.)
| | - Jacques Turgeon
- Tabula Rasa HealthCare Group, Precision Pharmacotherapy Research and Development Institute, 13485 Veterans Way, Orlando, FL 32827, USA
- Correspondence: ; Tel.: +1-856-938-8793
| | - Jennifer M. Bingham
- Tabula Rasa HealthCare Group, Office of Translational Research and Residency Programs, 228 Strawbridge Dr, Moorestown, NJ 08057, USA;
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26
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Das B, Rawat VS, Ramasubbu SK, Agnihotri A, Kumar B. Potential drug-drug interaction prevalence and risk factors associated with QT interval prolonging psychotropic use in children and adolescents. PROGRESS IN PEDIATRIC CARDIOLOGY 2022. [DOI: 10.1016/j.ppedcard.2021.101456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Gragg JI, Jones JD, Miller JA. Long QT and Cardiac Arrest After Symptomatic Improvement of Pulmonary Edema. Fed Pract 2022; 38:S23-S25. [PMID: 35136341 DOI: 10.12788/fp.0187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A case of extreme QT prolongation induced following symptomatic resolution of acute pulmonary edema is both relatively unknown and poorly understood.
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Affiliation(s)
- James I Gragg
- Carl R. Darnall Army Medical Center, Fort Hood, Texas.,Uniformed Services University of the Health Sciences, Bethesda, Maryland
| | - James D Jones
- Martin Army Community Hospital, Fort Benning, Georgia
| | - Joel A Miller
- Carl R. Darnall Army Medical Center, Fort Hood, Texas.,Uniformed Services University of the Health Sciences, Bethesda, Maryland.,228th Combat Support Hospital at Fort Sam Houston, San Antonio, Texas
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28
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Jha S. A Case Report on QTc Prolongation: Understanding the Medication Risks and Electrolyte Imbalance. Cureus 2022; 14:e21421. [PMID: 35198326 PMCID: PMC8855979 DOI: 10.7759/cureus.21421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2022] [Indexed: 12/01/2022] Open
Abstract
Prolonged QTc interval is one of the critical risk factors for sudden cardiac death. We all know that sudden cardiac death is often caused by acute onset ventricular arrhythmia, and QTc prolongation is one of the potential risk factors. It can be congenital or acquired. The acquired ones are commonly witnessed in day-to-day clinical practice. Several classes of mediations are well known to cause these conditions. Among many antiarrhythmic agents, especially amiodarone, is a critical drug to be monitored, as it strongly potentiates QTc prolongation. Especially in combination with metabolic abnormalities, this abnormality can occur rapidly with notable clinical presentation. This case report elicits an interesting clinical scenario in which a 79-year-old pleasant lady with multiple comorbidities presents with a syncopal episode. Missing the cardiologist’s appointment for dose adjustments of her medication, amiodarone was noteworthy. Also, an acute electrolyte imbalance from the possibly recent use of diuretics aggravated the clinical situation. On presentation, the electrocardiogram showed a remarkably prolonged QTc, which was way more compared to the prior ones available. Discontinuation of amiodarone and repletion of the electrolytes brought down the QTc interval to almost a normal range and no syncopal episode within two days. Hence, understanding the medications’ potential risks and having a close watch on the possible side effects is key to avoiding dreadful complications of arrhythmia and sudden cardiac death from the same. This case report cumulatively covers this essential medical knowledge and practical, vital points.
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29
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Campagnari S, Zamboni L, Fusina F, Casari R, Lugoboni F. Case Report: High doses of Zolpidem and QT interval lengthening: Is there a relationship? A case series. Front Psychiatry 2022; 13:1033061. [PMID: 36339861 PMCID: PMC9632434 DOI: 10.3389/fpsyt.2022.1033061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 10/04/2022] [Indexed: 11/30/2022] Open
Abstract
Zolpidem is indicated in cases of severe insomnia in adults and, as for BDZs, its assumption should be limited to short periods under close medical supervision. Since several drugs cause corrected QT interval (QTc) elongation, the authors investigated whether high daily doses of Zolpidem could cause QTc elongation. The study was conducted in the Addiction Medicine Unit of the G.B. Rossi University Hospital in Verona. The data were collected from hospitalizations carried out between January 2015 and February 2020 and refer to a total of 74 patients, 38 males and 36 females, who were treated for detoxification from high doses of Zolpidem with the "Verona Detox Approach With Flumazenil." One patient out of 74 had QTc elongation (479 ms). The patient was male and took a daily dose of 50 mg of Zolpidem; he did not take concomitant therapies that could cause QTc lengthening. He had no electrolyte alterations, no contemporary or previous intake of barbiturates, heroin, cocaine, THC, alcohol, NMDA or nicotine which could cause an elongation of the QTc interval. The present study highlights the low risk of QTc elongation due to high dosages of Zolpidem; however, if, on one hand, we can affirm that Zolpidem is a safe drug, on the other, the widespread use of high dosages of this drug for prolonged periods of time is problematic and worrying.
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Affiliation(s)
- Simone Campagnari
- Unit of Addiction Medicine, Department of Internal Medicine, G.B. Rossi Hospital, Verona, Italy
| | - Lorenzo Zamboni
- Unit of Addiction Medicine, Department of Internal Medicine, G.B. Rossi Hospital, Verona, Italy.,Department of Neuroscience, Biomedicine and Movement, University of Verona, Verona, Italy
| | - Francesca Fusina
- Department of General Psychology, University of Padua, Padua, Italy.,Padova Neuroscience Center, University of Padua, Padua, Italy
| | - Rebecca Casari
- Unit of Addiction Medicine, Department of Internal Medicine, G.B. Rossi Hospital, Verona, Italy
| | - Fabio Lugoboni
- Unit of Addiction Medicine, Department of Internal Medicine, G.B. Rossi Hospital, Verona, Italy
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30
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Itoh M, Nakajima Y, Kuwano K, Maeda D, Sakurai Y, Matsui Y, Kawamoto S. Improving the accuracy of estimating blood calcium concentration in Holstein cows using electrocardiographic variables. J Vet Med Sci 2021; 84:193-198. [PMID: 34897186 PMCID: PMC8920712 DOI: 10.1292/jvms.21-0320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We previously reported the possibility of using the electrocardiogram variable to estimate blood calcium (Ca) concentration in dairy cows based on the strong positive correlation between the blood Ca concentration and the inverse of the corrected ST peak interval (STc-1). To improve the accuracy of the estimation of blood Ca concentration, we investigated the relationship between blood Ca concentration and STc-1 for each postpartum day and available variables other than STc-1. We measured multiple variables (milk yield, calving number, age, body temperature, etc.), including serum total Ca concentration (tCa), blood ionized Ca concentration (iCa) and STc-1 in 462 Holstein cows on days 0, 1, 2, 3, 5, and 7 postpartum. A very high correlation was observed between iCa and tCa. The association between tCa and STc-1 for each postpartum day had a high coefficient of determination of 0.61-0.79 postpartum 0-2 days but decreased after the third day. In the investigation using the data from postpartum days 0-2, STc-1, heart rate interval, calving number, and age were highly correlated with tCa. In addition, a multiple regression equation was obtained with tCa as the objective variable and STc-1 and calving number as explanatory variables. The estimation accuracy was improved as compared with the simple regression equation using only STc-1 as the explanatory variable. This multiple regression equation was used for 11 cows suspected of having hypocalcemia, and it was able to correctly detect cows requiring early treatment, except for one cow.
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Affiliation(s)
- Megumi Itoh
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine
| | | | - Kouki Kuwano
- Industrial Research Center, Hokkaido Research Organization
| | - Daisuke Maeda
- Industrial Research Center, Hokkaido Research Organization
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31
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von Both I, Santos B. Death of a young woman with cyclic vomiting: a case report. Forensic Sci Med Pathol 2021; 17:715-722. [PMID: 34735682 DOI: 10.1007/s12024-021-00410-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2021] [Indexed: 01/19/2023]
Abstract
We report the death of a 22-year-old woman, with a 3½ year history of cyclic vomiting and cannabis use since age 14, who developed torsades de pointes cardiac arrythmia while being treated in the emergency room for nausea and vomiting. Resuscitation restored spontaneous cardiac circulation, however, due to post-cardiac arrest anoxic brain injury, she never regained consciousness and was declared brain dead 4 days later. Postmortem examination confirmed hypoxic-ischemic encephalopathy, in keeping with the in-hospital diagnosis of brain death. The heart was anatomically normal but showed signs of acute post-cardiopulmonary arrest reperfusion injury. As a consequence of limited survival in hospital in a neuro-vegetative state, early bronchopneumonia and isolated pulmonary thromboemboli were seen. Toxicological studies confirmed cannabis use, in addition to the presence of haloperidol and ondansetron. Genetic studies were performed to rule out a possible channelopathy and revealed a mutation in the MYBPC3 and RYR2 genes. Death in this woman with cannabinoid hyperemesis syndrome was attributed to a fatal cardiac arrhythmia complicating vomiting-induced hypokalemia and treatment with QT interval prolonging and potentially arrhythmogenic medications, with the identified cardiac genetic mutations listed as contributing factors. The emphasis of this report is a) to raise awareness that death can occur due to cyclic vomiting, b) provide a brief but practical overview of cannabinoid hyperemesis syndrome, c) describe the findings from our postmortem examination and come to the most reasonable cause and mechanism of death, d) comment on the risk factors associated with torsades de pointes cardiac arrythmia, and e) conclude that a complete postmortem examination is needed to exclude an anatomical or toxicological cause of death in cannabinoid hyperemesis syndrome, a disabling but preventable disorder.
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Affiliation(s)
- Ingo von Both
- Provincial Forensic Pathology Unit, Department of Laboratory Medicine & Pathobiology, Ontario Forensic Pathology Service, University of Toronto, 25 Morton Shulman Avenue, Toronto, ON, M3M 0B1, Canada. .,Office of the Chief Medical Examiner, Department of Laboratory Medicine & Pathology, University of Alberta, 7007 - 116 Street NW, Edmonton, AB T6H 5R8, Canada.
| | - Brittini Santos
- Provincial Forensic Pathology Unit, Department of Laboratory Medicine & Pathobiology, Ontario Forensic Pathology Service, University of Toronto, 25 Morton Shulman Avenue, Toronto, ON, M3M 0B1, Canada
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Abstract
Delirium, sometimes referred to as encephalopathy, is an acute confusional state that is both common in hospitalized patients and associated with poor outcomes. For patients, families, and caregivers, delirium can be a traumatic experience. While delirium is one of the most common diagnoses encountered by the consulting neurologist, the majority of the time it will have been previously unrecognized as such by the care team. Neurologic syndromes such as dementia or aphasia can either be misdiagnosed as delirium or may coexist with it, necessitating careful neurologic assessment. Once the diagnosis of delirium has been established, a careful evaluation for predisposing and precipitating factors can help uncover modifiable contributors, which should be addressed as part of a multicomponent, primarily nonpharmacologic intervention. Importantly, delirium management, which begins with comprehensive prevention, should emphasize the humanity of the delirious patient and the challenges of caring for this vulnerable population. When considered, delirium represents an important opportunity for the neurologist to substantially enhance patient care.
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Affiliation(s)
- Sophia L Ryan
- Department of Neurology, Mount Sinai Medical Center, New York, New York
| | - Eyal Y Kimchi
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts
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33
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Mantri N, Lu M, Zaroff JG, Risch N, Hoffmann T, Oni-Orisan A, Lee C, Iribarren C. Torsade de pointes: A nested case-control study in an integrated healthcare delivery system. Ann Noninvasive Electrocardiol 2021; 27:e12888. [PMID: 34547155 PMCID: PMC8739596 DOI: 10.1111/anec.12888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 08/21/2021] [Indexed: 11/28/2022] Open
Abstract
Background TdP is a form of polymorphic ventricular tachycardia which develops in the setting of a prolonged QT interval. There are limited data describing risk factors, treatment, and outcomes of this potentially fatal arrhythmia. Objective Our goals were as follows: (1) to validate cases presenting with Torsade de Pointes (TdP), (2) to identify modifiable risk factors, and (3) to describe the management strategies used for TdP and its prognosis in a real‐world healthcare setting. Methods Case–control study (with 2:1 matching on age, sex, and race/ethnicity) nested within the Genetic Epidemiology Research on Aging (GERA) cohort. Follow‐up of the cohort for case ascertainment was between January 01, 2005 and December 31, 2018. Results A total of 56 cases of TdP were confirmed (incidence rate = 3.6 per 100,000 persons/years). The average (SD) age of the TdP cases was 74 (13) years, 55 percent were female, and 16 percent were non‐white. The independent predictors of TdP were potassium concentration <3.6 mEq/L (OR = 10.6), prior history of atrial fibrillation/flutter (OR = 6.2), QTc >480 ms (OR = 4.4) and prior history of coronary artery disease (OR = 2.6). Exposure to furosemide and amiodarone was significantly greater in cases than in controls. The most common treatment for TdP was IV magnesium (78.6%) and IV potassium repletion (73.2%). The in‐hospital and 1‐year mortality rates for TdP cases were 10.7% and 25.0% percent, respectively. Conclusions These findings may inform quantitative multivariate risk indices for the prediction of TdP and could guide practitioners on which patients may qualify for continuous ECG monitoring and/or electrolyte replacement therapy.
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Affiliation(s)
- Neha Mantri
- Department of Cardiology, Kaiser Permanente San Francisco Medical Center, San Francisco, CA, USA
| | - Meng Lu
- Division of Research, Kaiser Permanente, Oakland, CA, USA
| | - Jonathan G Zaroff
- Department of Cardiology, Kaiser Permanente San Francisco Medical Center, San Francisco, CA, USA
| | - Neil Risch
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
| | - Thomas Hoffmann
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA.,Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA
| | - Akinyemi Oni-Orisan
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
| | - Catherine Lee
- Division of Research, Kaiser Permanente, Oakland, CA, USA
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Alsagaff MY, Oktaviono YH, Dharmadjati BB, Lefi A, Al‐Farabi MJ, Gandi P, Marsudi BA, Azmi Y. Electrocardiography on admission is associated with poor outcomes in coronavirus disease 2019 (COVID-19) patients: A systematic review and meta-analysis. J Arrhythm 2021; 37:877-885. [PMID: 34386111 PMCID: PMC8339106 DOI: 10.1002/joa3.12573] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 05/01/2021] [Accepted: 05/17/2021] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Electrocardiogram (ECG) is a widely accessible diagnostic tool that can easily be obtained on admission and can reduce excessive contact with coronavirus disease 2019 (COVID-19) patients. A systematic review and meta-analysis were performed to evaluate the latest evidence on the association of ECG on admission and the poor outcomes in COVID-19. METHODS A literature search was conducted on online databases for observational studies evaluating ECG parameters and composite poor outcomes comprising ICU admission, severe illness, and mortality in COVID-19 patients. RESULTS A total of 2,539 patients from seven studies were included in this analysis. Pooled analysis showed that a longer corrected QT (QTc) interval and more frequent prolonged QTc interval were associated with composite poor outcome ([WMD 6.04 [2.62-9.45], P = .001; I 2:0%] and [RR 1.89 [1.52-2.36], P < .001; I 2:17%], respectively). Patients with poor outcome had a longer QRS duration and a faster heart rate compared with patients with good outcome ([WMD 2.03 [0.20-3.87], P = .030; I 2:46.1%] and [WMD 5.96 [0.96-10.95], P = .019; I 2:55.9%], respectively). The incidence of left bundle branch block (LBBB), premature atrial contraction (PAC), and premature ventricular contraction (PVC) were higher in patients with poor outcome ([RR 2.55 [1.19-5.47], P = .016; I 2:65.9%]; [RR 1.94 [1.32-2.86], P = .001; I 2:62.8%]; and [RR 1.84 [1.075-3.17], P = .026; I 2:70.6%], respectively). T-wave inversion and ST-depression were more frequent in patients with poor outcome ([RR 1.68 [1.31-2.15], P < .001; I 2:14.3%] and [RR 1.61 [1.31-2.00], P < .001; I 2:49.5%], respectively). CONCLUSION Most ECG abnormalities on admission are significantly associated with an increased composite poor outcome in patients with COVID-19.
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Affiliation(s)
- Mochamad Yusuf Alsagaff
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Yudi Her Oktaviono
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Budi Baktijasa Dharmadjati
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Achmad Lefi
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Makhyan Jibril Al‐Farabi
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Parama Gandi
- Department of Cardiology and Vascular MedicineFaculty of MedicineSoetomo General HospitalUniversitas AirlanggaSurabayaIndonesia
| | - Bagas Adhimurda Marsudi
- Department of Cardiology and Vascular MedicineFaculty of MedicineHarapan Kita National Heart CenterUniversitas IndonesiaJakartaIndonesia
| | - Yusuf Azmi
- Faculty of MedicineUniversitas AirlanggaSurabayaIndonesia
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35
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Abstract
Conduction disorders and arrhythmias remain difficult to treat and are increasingly prevalent owing to the increasing age and body mass of the general population, because both are risk factors for arrhythmia. Many of the underlying conditions that give rise to arrhythmia - including atrial fibrillation and ventricular arrhythmia, which frequently occur in patients with acute myocardial ischaemia or heart failure - can have an inflammatory component. In the past, inflammation was viewed mostly as an epiphenomenon associated with arrhythmia; however, the recently discovered inflammatory and non-canonical functions of cardiac immune cells indicate that leukocytes can be arrhythmogenic either by altering tissue composition or by interacting with cardiomyocytes; for example, by changing their phenotype or perhaps even by directly interfering with conduction. In this Review, we discuss the electrophysiological properties of leukocytes and how these cells relate to conduction in the heart. Given the thematic parallels, we also summarize the interactions between immune cells and neural systems that influence information transfer, extrapolating findings from the field of neuroscience to the heart and defining common themes. We aim to bridge the knowledge gap between electrophysiology and immunology, to promote conceptual connections between these two fields and to explore promising opportunities for future research.
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36
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Baracaldo-Santamaría D, Llinás-Caballero K, Corso-Ramirez JM, Restrepo CM, Dominguez-Dominguez CA, Fonseca-Mendoza DJ, Calderon-Ospina CA. Genetic and Molecular Aspects of Drug-Induced QT Interval Prolongation. Int J Mol Sci 2021; 22:8090. [PMID: 34360853 PMCID: PMC8347245 DOI: 10.3390/ijms22158090] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 12/22/2022] Open
Abstract
Long QT syndromes can be either acquired or congenital. Drugs are one of the many etiologies that may induce acquired long QT syndrome. In fact, many drugs frequently used in the clinical setting are a known risk factor for a prolonged QT interval, thus increasing the chances of developing torsade de pointes. The molecular mechanisms involved in the prolongation of the QT interval are common to most medications. However, there is considerable inter-individual variability in drug response, thus making the application of personalized medicine a relevant aspect in long QT syndrome, in order to evaluate the risk of every individual from a pharmacogenetic standpoint.
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Affiliation(s)
- Daniela Baracaldo-Santamaría
- School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (D.B.-S.); (J.M.C.-R.); (C.A.D.-D.)
| | - Kevin Llinás-Caballero
- GENIUROS Research Group, Center for Research in Genetics and Genomics (CIGGUR), School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (K.L.-C.); (C.M.R.); (D.J.F.-M.)
- Institute for Immunological Research, University of Cartagena, Cartagena 130014, Colombia
| | - Julián Miguel Corso-Ramirez
- School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (D.B.-S.); (J.M.C.-R.); (C.A.D.-D.)
| | - Carlos Martín Restrepo
- GENIUROS Research Group, Center for Research in Genetics and Genomics (CIGGUR), School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (K.L.-C.); (C.M.R.); (D.J.F.-M.)
| | | | - Dora Janeth Fonseca-Mendoza
- GENIUROS Research Group, Center for Research in Genetics and Genomics (CIGGUR), School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (K.L.-C.); (C.M.R.); (D.J.F.-M.)
| | - Carlos Alberto Calderon-Ospina
- GENIUROS Research Group, Center for Research in Genetics and Genomics (CIGGUR), School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 111221, Colombia; (K.L.-C.); (C.M.R.); (D.J.F.-M.)
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Ardhianto D, Suharjono, Soedarsono, Fatmawati U. Analysis of the side effect of QTc interval prolongation in the bedaquiline regimen in drug resistant tuberculosis patients. J Basic Clin Physiol Pharmacol 2021; 32:421-427. [PMID: 34214323 DOI: 10.1515/jbcpp-2020-0415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/23/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Indonesia is one of the top 20 countries with the highest prevalence of drug resistant tuberculosis (DR-TB) worldwide with a percentage of new cases of 2.4% and retreatment of 13%. Bedaquiline (BDQ) is one of the drugs that used in the individual long regimen treating DR-TB. BDQ is also combined with levofloxacin (LFX) and/or clofazimine (CFZ) that can cause QTc interval prolongation. The aim was to study the differences in the use of BDQ regimens to the lengthening of the QTc interval and to study risk factors (diabetes, hypokalemia, sex, BMI, and age) in BDQ regimen. METHODS This study was an observational retrospective study with a total sampling method, which was conducted at Dr. Soetomo General Hospital Surabaya. Samples from this study were patients diagnosed with DR-TB at Dr. Soetomo General Hospital Surabaya in the period of January 2015-December 2019 who used BDQ regimen and met the inclusion criteria. The ECG data were analyzed from the mean of each group (BDQ regimen and risk factors), also analyzed using statistical analysis. RESULTS Data obtained from total sample in this study were 73 patients. The most widely used different regimens in this study were the combination of BDQ + LFX by 36 patients (49.3%), BDQ + LFX + CFZ by 16 patients (21.9%), BDQ by 11 patients (15.1%) and BDQ + CFZ 10 patients (13.7%). Out of 73 patients, 52 patients (71.2%) experienced lengthening of the QT interval and grade 1 of QTc interval prolongation occurred in most patients and also the onset was mostly one month after using BDQ regimen. The side effects of QTc interval prolongation from groups of combination and risk factors were no difference in each month (p>0.05). CONCLUSIONS This study can be concluded that there were no differences in the QTc prolongation between the groups of BDQ regimen (BDQ, BDQ + LFX, BDQ + CFZ and BDQ + LFX + CFZ) and the groups of risk factors.
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Affiliation(s)
- Denny Ardhianto
- Department of Clinical Pharmacy, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
| | - Suharjono
- Department of Clinical Pharmacy, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
| | - Soedarsono
- Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Umi Fatmawati
- Department of Pharmacy, Dr. Soetomo General Hospital, Surabaya, Indonesia
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Crescioli G, Brilli V, Lanzi C, Burgalassi A, Ieri A, Bonaiuti R, Romano E, Innocenti R, Mannaioni G, Vannacci A, Lombardi N. Adverse drug reactions in SARS-CoV-2 hospitalised patients: a case-series with a focus on drug-drug interactions. Intern Emerg Med 2021; 16:697-710. [PMID: 33355896 PMCID: PMC7755981 DOI: 10.1007/s11739-020-02586-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/21/2020] [Indexed: 11/12/2022]
Abstract
Due to the need of early and emergency effective treatments for COVID-19, less attention may have been paid to their safety during the global emergency. In addition, characteristics of drug-drug interaction (DDI)-related adverse drug reactions (ADRs) in COVID-19 patients have not yet been studied in depth. The aim of the present case-series study is to describe clinical and pharmacological characteristics of SARS-CoV-2 hospitalised patients, focusing on ADRs, particularly those related to DDIs. We evaluated all reports of COVID-19 medication-related ADRs collected within the COVID-19 Units of Careggi University Hospital, Florence (Italy), between January 1st and 31st May 2020. Information regarding COVID-19 medications, patients' demographic and clinical characteristics, concomitant drugs, ADRs description and outcome, were collected. Each case was evaluated for the causality assessment and to identify the presence of DDIs. During the study period, 23 Caucasian patients (56.5% males, mean age 76.1 years) experienced one or more ADRs. The majority of them were exposed to polypharmacy and 17.4% presented comorbidities. ADRs were referred to cardiovascular, psychiatric and gastrointestinal disorders. The most frequently reported preferred term was QT prolongation (mean QT interval 496.1 ms). ADRs improved or resolved completely in 60.8% of cases. For all patients, a case-by-case evaluation revealed the presence of one or more DDIs, especially those related to pharmacokinetic interactions. Despite the small number of patients, our evidence underline the clinical burden of DDIs in SARS-CoV-2 hospitalised patients and the risk of unexpected and uncommon psychiatric ADRs.
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Affiliation(s)
- Giada Crescioli
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Tuscan Regional Centre of Pharmacovigilance, Florence, Italy
| | - Valentina Brilli
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Cecilia Lanzi
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Andrea Burgalassi
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Alessandra Ieri
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Roberto Bonaiuti
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Joint Laboratory of Technological Solutions for Clinical Pharmacology, Pharmacovigilance and Bioinformatics, University of Florence, Florence, Italy
| | - Elias Romano
- Internal Medicine Unit 2, Emergency Department, Careggi University Hospital, Florence, Italy
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Rinaldo Innocenti
- Internal Medicine Unit 2, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Guido Mannaioni
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy
| | - Alfredo Vannacci
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
- Tuscan Regional Centre of Pharmacovigilance, Florence, Italy
- Joint Laboratory of Technological Solutions for Clinical Pharmacology, Pharmacovigilance and Bioinformatics, University of Florence, Florence, Italy
| | - Niccolò Lombardi
- Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy.
- Tuscan Regional Centre of Pharmacovigilance, Florence, Italy.
- Toxicology Unit, Emergency Department, Careggi University Hospital, Florence, Italy.
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Keskin G, Karaman ST, Basat O. Evaluation of the relationship between the level of addiction and exhaled carbon monoxide levels with QT dispersion in smokers. Tob Induc Dis 2021; 19:22. [PMID: 33815033 PMCID: PMC8010797 DOI: 10.18332/tid/133053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION Smoking increases the risk of arrhythmia. QT dispersion (QTd) is an important indicator for the determination of ventricular arrhythmia. In this study, we aimed to determine the arrhythmia risk by evaluating QTd in smokers and to assess the relationship between the level of nicotine addiction and carbon monoxide (CO) level in the expiratory air. METHODS This study was designed as a single-center, cross-sectional study. Among the chronic smokers referred to the Smoking Cessation Clinic of a tertiary hospital between October 2019 and January 2020, all those who had no risk factors for cardiac arrhythmias, except smoking, were included in the study. Sociodemographic data and smoking characteristics of the participants were collected and exhaled CO levels were measured. QT intervals were measured in all leads by using a 12-lead standard electrocardiogram (ECG), and heart rate corrected QT (QTc) intervals, QT dispersion (QTd), and corrected QT dispersion (QTcd) were calculated. RESULTS The mean age of the 250 patients was 37.2±9.3 years and the majority of patients (65%) were male. The mean amount of smoking was 25.74±16.03 packs/year and the mean value of CO was 12.36±7.06 ppm. The mean QTd was 23.83±13.12 ms, and the mean QTcd was 26.63±15.02 ms. A statistically significant relationship was found between QTd and QTcd and level of addiction, consumption of sticks/day and packs/year, and exhaled CO values (all p<0.001). CONCLUSIONS It was found that as the level of addiction, cigarette use amount, exhaled CO levels, and BMI increased in smokers, QT dispersion and arrhythmia risk increased.
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Affiliation(s)
- Gamze Keskin
- Gaziosmanpaşa Training and Research Hospital, Department of Family Medicine, University of Health Sciences, Istanbul, Turkey
| | - Sibel Tunç Karaman
- Gaziosmanpaşa Training and Research Hospital, Department of Family Medicine, University of Health Sciences, Istanbul, Turkey
| | - Okcan Basat
- Gaziosmanpaşa Training and Research Hospital, Department of Family Medicine, University of Health Sciences, Istanbul, Turkey
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Bisang M, Latshang TD, Aeschbacher SS, Huber F, Flueck D, Lichtblau M, Ulrich S, Hasler ED, Scheiwiller PM, Ulrich S, Bloch KE, Furian M. Nocturnal Heart Rate and Cardiac Repolarization in Lowlanders With Chronic Obstructive Pulmonary Disease at High Altitude: Data From a Randomized, Placebo-Controlled Trial of Nocturnal Oxygen Therapy. Front Med (Lausanne) 2021; 8:557369. [PMID: 33732710 PMCID: PMC7956979 DOI: 10.3389/fmed.2021.557369] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 01/25/2021] [Indexed: 01/05/2023] Open
Abstract
Background: Chronic obstructive pulmonary disease (COPD) is associated with cardiovascular disease. We investigated whether sleeping at altitude increases nocturnal heart rate (HR) and other markers of cardiovascular risk or arrhythmias in lowlanders with COPD and whether this can be prevented by nocturnal oxygen therapy (NOT). Methods: Twenty-four COPD patients, with median age of 66 years and forced expiratory volume in 1 s (FEV1) 55% predicted, living <800 m underwent sleep studies at Zurich (490 m) and during 2 sojourns of 2 days each at St. Moritz (2,048 m) separated by 2-week washout at <800 m. During nights at 2,048 m, patients received either NOT (2,048 m NOT) or ambient air (2,048 m placebo) 3 L/min via nasal cannula according to a randomized, placebo-controlled crossover trial. Sleep studies comprised ECG and pulse oximetry to measure HR, rhythm, HR-adjusted QT interval (QTc), and mean oxygen saturation (SpO2). Results: In the first nights at 490 m, 2,048 m placebo, and 2,048 m NOT, medians (quartiles) of SpO2 were 92% (90; 94), 86% (83; 89), and 97% (95; 98) and of HR were 73 (66; 82), 82 (71; 85), and 78 bpm (67; 74) (P < 0.05 all respective comparisons). QTc increased from 417 ms (404; 439) at 490 m to 426 ms (405; 440) at 2,048 m placebo (P < 0.05) and was 420 ms (405; 440) at 2,048 m NOT (P = NS vs. 2,048 m placebo). The number of extrabeats and complex arrhythmias was similar over all conditions. Conclusions: While staying at 2,048 m, lowlanders with COPD experienced nocturnal hypoxemia in association with an increased HR and prolongation of the QTc interval. NOT significantly improved SpO2 and lowered HR, without changing QTc. Whether oxygen therapy would reduce HR and arrhythmia during longer altitude sojourns remains to be elucidated.
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Affiliation(s)
- Maya Bisang
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Tsogyal D Latshang
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Sayaka S Aeschbacher
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Fabienne Huber
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Deborah Flueck
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Mona Lichtblau
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Stefanie Ulrich
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Elisabeth D Hasler
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Philipp M Scheiwiller
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Silvia Ulrich
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Konrad E Bloch
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
| | - Michael Furian
- Department of Respiratory Medicine, Sleep Disorders Center, University Hospital of Zurich, Zurich, Switzerland
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Trachsel DS, Calloe K, J Rgensen E, Lunddahl CS, Pedersen PJ, Kanters JRK, Klaerke DA, Buhl R. Evaluation of electrocardiographic repolarization parameters after administration of trimethoprim-sulfadiazine, detomidine, or their combination in horses. Am J Vet Res 2021; 82:207-217. [PMID: 33629897 DOI: 10.2460/ajvr.82.3.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine whether administration of trimethoprim-sulfadiazine (TMS), detomidine (DET), or TMS plus DET would be associated with changes in ECG repolarization parameters in horses. ANIMALS 9 healthy adult horses. PROCEDURES Each horse received 4 treatments in a blinded, randomized, crossover study design as follows: TMS, 16 to 24 mg/kg, IV; DET, 0.015 to 0.02 mg/kg, IV; TMS plus DET; and saline (0.9% NaCl) solution. Surface ECG traces were obtained over 24 hours, and repolarization parameters were measured at predefined time points after each treatment and compared with a 2-way ANOVA for repeated measures. RESULTS Heart rate-corrected QT intervals (QTc) were significantly increased after administration of DET (mean ± SD difference in QTc, 36.57 ± 23.07 milliseconds; increase of 7%) and TMS plus DET (44.96 ± 29.16 milliseconds; increase of 9%), compared with baseline (before treatment) values and values after administration of saline solution. Saline solution and TMS alone did not affect QTc. CONCLUSIONS AND CLINICAL RELEVANCE Administration of DET or TMS plus DET was associated with a significant and possibly clinically relevant prolongation of QTc, with prolongation of 7% to 9%, a range that is considered as a risk factor for the development of cardiac arrhythmias in people. Results were unexpected because DET is considered to be a safe sedative for horses.
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Alahmadi A, Davies A, Royle J, Goodwin L, Cresswell K, Arain Z, Vigo M, Jay C. An explainable algorithm for detecting drug-induced QT-prolongation at risk of torsades de pointes (TdP) regardless of heart rate and T-wave morphology. Comput Biol Med 2021; 131:104281. [PMID: 33636421 DOI: 10.1016/j.compbiomed.2021.104281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 12/23/2022]
Abstract
Torsade de points (TdP), a life-threatening arrhythmia that can increase the risk of sudden cardiac death, is associated with drug-induced QT-interval prolongation on the electrocardiogram (ECG). While many modern ECG machines provide automated measurements of the QT-interval, these automated QT values are usually correct only for a noise-free normal sinus rhythm, in which the T-wave morphology is well defined. As QT-prolonging drugs often affect the morphology of the T-wave, automated QT measurements taken under these circumstances are easily invalidated. An additional challenge is that the QT-value at risk of TdP varies with heart rate, with the slower the heart rate, the greater the risk of TdP. This paper presents an explainable algorithm that uses an understanding of human visual perception and expert ECG interpretation to automate the detection of QT-prolongation at risk of TdP regardless of heart rate and T-wave morphology. It was tested on a large number of ECGs (n=5050) with variable QT-intervals at varying heart rates, acquired from a clinical trial that assessed the effect of four known QT-prolonging drugs versus placebo on healthy subjects. The algorithm yielded a balanced accuracy of 0.97, sensitivity of 0.94, specificity of 0.99, F1-score of 0.88, ROC (AUC) of 0.98, precision-recall (AUC) of 0.88, and Matthews correlation coefficient (MCC) of 0.88. The results indicate that a prolonged ventricular repolarisation area can be a significant risk predictor of TdP, and detection of this is potentially easier and more reliable to automate than measuring the QT-interval distance directly. The proposed algorithm can be visualised using pseudo-colour on the ECG trace, thus intuitively 'explaining' how its decision was made, which results of a focus group show may help people to self-monitor QT-prolongation, as well as ensuring clinicians can validate its results.
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Affiliation(s)
- Alaa Alahmadi
- Department of Computer Science, The University of Manchester, Manchester, UK.
| | - Alan Davies
- Division of Informatics, Imaging and Data Sciences, School of Health Sciences, The University of Manchester, Manchester, UK.
| | - Jennifer Royle
- Digital Experimental Cancer Medicine Team, CRUK Manchester Institute, And the Christie NHS Foundation, Manchester, UK.
| | - Leanna Goodwin
- Digital Experimental Cancer Medicine Team, CRUK Manchester Institute, And the Christie NHS Foundation, Manchester, UK.
| | - Katharine Cresswell
- Cancer Precision Medicine and Cancer Prevention and Early Detection, NIHR Manchester Biomedical Research Centre (BRC), Manchester University NHS Foundation Trust, Manchester, UK.
| | - Zahra Arain
- Cancer Precision Medicine and Cancer Prevention and Early Detection, NIHR Manchester Biomedical Research Centre (BRC), Manchester University NHS Foundation Trust, Manchester, UK.
| | - Markel Vigo
- Department of Computer Science, The University of Manchester, Manchester, UK.
| | - Caroline Jay
- Department of Computer Science, The University of Manchester, Manchester, UK.
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Solbiati S, Martin-Yebra A, Vaïda P, Caiani EG. Evaluation of Cardiac Circadian Rhythm Deconditioning Induced by 5-to-60 Days of Head-Down Bed Rest. Front Physiol 2021; 11:612188. [PMID: 33519517 PMCID: PMC7838678 DOI: 10.3389/fphys.2020.612188] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/16/2020] [Indexed: 12/14/2022] Open
Abstract
Head-down tilt (HDT) bed rest elicits changes in cardiac circadian rhythms, generating possible adverse health outcomes such as increased arrhythmic risk. Our aim was to study the impact of HDT duration on the circadian rhythms of heart beat (RR) and ventricular repolarization (QTend) duration intervals from 24-h Holter ECG recordings acquired in 63 subjects during six different HDT bed rest campaigns of different duration (two 5-day, two 21-day, and two 60-day). Circadian rhythms of RR and QTend intervals series were evaluated by Cosinor analysis, resulting in a value of midline (MESOR), oscillation amplitude (OA) and acrophase (φ). In addition, the QTc (with Bazett correction) was computed, and day-time, night-time, maximum and minimum RR, QTend and QTc intervals were calculated. Statistical analysis was conducted, comparing: (1) the effects at 5 (HDT5), 21 (HDT21) and 58 (HDT58) days of HDT with baseline (PRE); (2) trends in recovery period at post-HDT epochs (R) in 5-day, 21-day, and 60-day HDT separately vs. PRE; (3) differences at R + 0 due to bed rest duration; (4) changes between the last HDT acquisition and the respective R + 0 in 5-day, 21-day, and 60-day HDT. During HDT, major changes were observed at HDT5, with increased RR and QTend intervals' MESOR, mostly related to day-time lengthening and increased minima, while the QTc shortened. Afterward, a progressive trend toward baseline values was observed with HDT progression. Additionally, the φ anticipated, and the OA was reduced during HDT, decreasing system's ability to react to incoming stimuli. Consequently, the restoration of the orthostatic position elicited the shortening of RR and QTend intervals together with QTc prolongation, notwithstanding the period spent in HDT. However, the magnitude of post-HDT changes, as well as the difference between the last HDT day and R + 0, showed a trend to increase with increasing HDT duration, and 5/7 days were not sufficient for recovering after 60-day HDT. Additionally, the φ postponed and the OA significantly increased at R + 0 compared to PRE after 5-day and 60-day HDT, possibly increasing the arrhythmic risk. These results provide evidence that continuous monitoring of astronauts' circadian rhythms, and further investigations on possible measures for counteracting the observed modifications, will be key for future missions including long periods of weightlessness and gravity transitions, for preserving astronauts' health and mission success.
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Affiliation(s)
- Sarah Solbiati
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy.,Institute of Electronics, Computer and Telecommunication Engineering, Consiglio Nazionale delle Ricerche, Milan, Italy
| | - Alba Martin-Yebra
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina, BSICoS Group, Universidad de Zaragoza, Zaragoza, Spain
| | - Pierre Vaïda
- College of Health Sciences, University of Bordeaux, Bordeaux, France
| | - Enrico G Caiani
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy.,Institute of Electronics, Computer and Telecommunication Engineering, Consiglio Nazionale delle Ricerche, Milan, Italy
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Carvalho LDF, Rodrigues LA, Pandossio JE, Gallassi AD. Análise Crítica Sobre Medicamentos Prescritos para o Uso Problemático de Crack. PSICOLOGIA: TEORIA E PESQUISA 2021. [DOI: 10.1590/0102.3772e372515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Resumo Estudo de abordagem descritiva, exploratória e retrospectiva que analisou prontuários de pacientes em tratamento pelo uso problemático de crack. Foram levantadas as prescrições, as interações medicamentosas e o perfil sociodemográfico destes pacientes. Foram feitas revisões de literaturas narrativas para verificar quais medicamentos apresentam maiores potenciais terapêuticos e para caracterizar o perfil dos usuários; dados dos prontuários e da literatura foram triangulados. Os resultados sugerem que os medicamentos utilizados no tratamento do uso problemático de crack são limitados, os medicamentos utilizados na prática não possuem evidências de eficácia, há interações relevantes nas prescrições e o perfil sociodemográfico desses usuários é semelhante com a literatura. Estudos adicionais são desejáveis para buscar um tratamento medicamentoso eficaz para o uso problemático de crack.
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Tziatzios GD, Didagelos M, Tziatzios I, Hadjimiltiades S, Karamitsos T. Torsades de Pointes and Prolonged Self-Terminating Ventricular Fibrillation Induced by Amiodarone. Cureus 2020; 12:e11693. [PMID: 33391927 PMCID: PMC7769795 DOI: 10.7759/cureus.11693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A 71-year-old man with a recent diagnosis of pneumonia developed paroxysmal atrial fibrillation and was admitted to the cardiology service. Amiodarone was administered intravenously to restore sinus rhythm. Significant prolongation of the QT interval (QTc = 640ms) was noted and an exceedingly prolonged (over 3 minutes), self-terminating, episode of ventricular flutter/fibrillation occurred during bedside monitoring. The event was terminated without first converting to a more organized ventricular rhythm and without any adverse neurological sequelae. Apart from the long duration of ventricular fibrillation and its spontaneous termination, our case highlights the importance of the continuous heart rhythm monitoring in patients with extreme QT interval prolongation.
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Chen C, Zhou J, Yu H, Zhang Q, Gao L, Yin X, Dong Y, Lin Y, Li D, Yang Y, Wang Y, Tse G, Xia Y. Identification of important risk factors for all-cause mortality of acquired long QT syndrome patients using random survival forests and non-negative matrix factorization. Heart Rhythm 2020; 18:426-433. [PMID: 33127541 DOI: 10.1016/j.hrthm.2020.10.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 10/02/2020] [Accepted: 10/25/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Acquired long QT syndrome (aLQTS) is often associated with poor clinical outcomes. OBJECTIVE The purpose of this study was to examine the important predictors of all-cause mortality of aLQTS patients by applying both random survival forest (RSF) and non-negative matrix factorization (NMF) analyses. METHODS Clinical characteristics and manually measured electrocardiographic (ECG) parameters were initially entered into the RSF model. Subsequently, latent variables identified using NMF were entered into the RSF as additional variables. The primary outcome was all-cause mortality. RESULTS A total of 327 aLQTS patients were included. The RSF model identified 16 predictive factors with positive variable importance values: cancer, potassium, RR interval, calcium, age, JT interval, diabetes mellitus, QRS duration, QTp interval, chronic kidney disease, QTc interval, hypertension, QT interval, female, JTc interval, and cerebral hemorrhage. Increasing the number of latent features between ECG indices, which incorporated from n = 0 to n = 4 by NMF, maximally improved the prediction ability of the RSF-NMF model (C-statistic 0.77 vs 0.89). CONCLUSION Cancer and serum potassium and calcium levels can predict all-cause mortality of aLQTS patients, as can ECG indicators including JTc and QRS. The present RSF-NMF model significantly improved mortality prediction.
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Affiliation(s)
- Cheng Chen
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Jiandong Zhou
- School of Data Science, City University of Hong Kong, Kowloon, China
| | - Haixu Yu
- Department of Cardiology, Peking University Third Hospital, Beijing, China
| | - Qingpeng Zhang
- School of Data Science, City University of Hong Kong, Kowloon, China
| | - Lianjun Gao
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xiaomeng Yin
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yingxue Dong
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yajuan Lin
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Daobo Li
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yiheng Yang
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yunsong Wang
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Gary Tse
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China.
| | - Yunlong Xia
- Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China.
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47
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Rezazadeh A, Mohebbi N. [Main challenges of electrolyte imbalance in older patients with COVID-19 and risk of QT prolongation]. Rev Esp Cardiol 2020; 74:199. [PMID: 33519022 PMCID: PMC7833788 DOI: 10.1016/j.recesp.2020.07.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Amir Rezazadeh
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Teherán, Irán.,Research Center for Rational Use of Drugs, Tehran University of Medical Sciences, Teherán, Irán
| | - Niayesh Mohebbi
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Teherán, Irán.,Research Center for Rational Use of Drugs, Tehran University of Medical Sciences, Teherán, Irán
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48
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Rezazadeh A, Mohebbi N. Main challenges of electrolyte imbalance in older patients with COVID-19 and risk of QT prolongation. ACTA ACUST UNITED AC 2020; 74:199. [PMID: 32855095 PMCID: PMC7402101 DOI: 10.1016/j.rec.2020.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 07/29/2020] [Indexed: 11/22/2022]
Affiliation(s)
- Amir Rezazadeh
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; Research Center for Rational Use of Drugs, Tehran University of Medical Sciences, Tehran, Iran
| | - Niayesh Mohebbi
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; Research Center for Rational Use of Drugs, Tehran University of Medical Sciences, Tehran, Iran.
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Anupama BK, Adhikari S, Chaudhuri D. Prolonged QT Interval in a Patient With Coronavirus Disease-2019: Beyond Hydroxychloroquine and Azithromycin. J Investig Med High Impact Case Rep 2020; 8:2324709620948407. [PMID: 32762368 PMCID: PMC7418230 DOI: 10.1177/2324709620948407] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Recent reports have suggested an increased risk of QT prolongation and subsequent life-threatening ventricular arrhythmias, particularly torsade de pointes, in patients with coronavirus disease-2019 (COVID-19) treated with hydroxychloroquine and azithromycin. In this article, we report the case of a 75-year-old female with a baseline prolonged QT interval in whom the COVID-19 illness resulted in further remarkable QT prolongation (>700 ms), precipitating recurrent self-terminating episodes of torsade de pointes that necessitated temporary cardiac pacing. Despite the correction of hypoxemia and the absence of reversible factors, such as adverse medication effects, electrolyte derangements, and usage of hydroxychloroquine/azithromycin, the QT interval remained persistently prolonged compared with the baseline with subsequent degeneration into ventricular tachycardia and death. Thus, we highlight that COVID-19 illness itself can potentially lead to further prolongation of QT interval and unmask fatal ventricular arrhythmias in patients who have a prolonged QT and low repolarization reserve at baseline.
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Affiliation(s)
- B K Anupama
- SUNY Upstate Medical University, Syracuse, NY, USA
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50
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Huang Y, Alsabbagh MW. Estimates of population‐based incidence of malignant arrhythmias associated with medication use—a narrative review. Fundam Clin Pharmacol 2020; 34:418-432. [DOI: 10.1111/fcp.12578] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Yichang Huang
- School of Pharmacy Faculty of Science University of Waterloo Room 4015, 10A Victoria St. S. Kitchener ON Canada
| | - Mhd. Wasem Alsabbagh
- School of Pharmacy Faculty of Science University of Waterloo Room 3006, 10A Victoria St. S. Kitchener ON Canada
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