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Stojanovic M, Nikolic M, Nedeljkovic I, Gojkovic D. QT Prolongation Preceding Ventricular Fibrillation After Amiodarone Administration: A Case Report. Cureus 2024; 16:e63763. [PMID: 39099957 PMCID: PMC11296664 DOI: 10.7759/cureus.63763] [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: 06/26/2024] [Indexed: 08/06/2024] Open
Abstract
Atrial fibrillation (AF) is the most common long-term arrhythmia in adults. Rhythm control in patients with AF involves efforts to restore and maintain sinus rhythm and is accomplished by medication, catheter ablation, or electrical cardioversion. Amiodarone represents one of the most commonly used antiarrhythmic medications. Prolonged use of amiodarone can lead to many side effects. One of the most severe side effects is drug-induced long QT syndrome (LQTS), which can cause malignant arrhythmias and sudden cardiac death. We presented a case of a 52-year-old male who was admitted to the Coronary Unit due to first diagnosed AF with a rapid ventricular response. After amiodarone infusion was administrated the patient lost consciousness and the monitor displayed torsades de pointes (TdP) ventricular tachycardia with rapid conversion to ventricular fibrillation (VF). Cardiac resuscitation with two direct current (DC) shocks was performed. The patient was stabilized, and restoration of sinus rhythm with significant QT prolongation on the ECG was noted. This is a rare case of short-term amiodarone administration causing LQTS, TdP, and VF. The findings or observations emphasize the significance of diligent ECG monitoring during amiodarone treatment.
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Affiliation(s)
- Milovan Stojanovic
- Department for Cardiovascular Diseases, Institute for Treatment and Rehabilitation Niska Banja, Nis, SRB
- Faculty of Medicine, Nis University, Nis, SRB
| | - Miroslav Nikolic
- Clinic for Cardiovascular Diseases, University Clinical Center Nis, Nis, SRB
| | - Ivana Nedeljkovic
- Clinic for Cardiovascular Diseases, University Clinical Center of Serbia, Belgrade, SRB
- Faculty of Medicine, Belgrade University, Belgrade, SRB
| | - Dejana Gojkovic
- Department for Cardiovascular Diseases, Institute for Treatment and Rehabilitation Niska Banja, Nis, SRB
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2
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Szumowski BA, Beshay-Taylor YM, Sadek R, Attia N. Complete Heart Block Induced Torsades de Pointes. Cureus 2024; 16:e55169. [PMID: 38558635 PMCID: PMC10979710 DOI: 10.7759/cureus.55169] [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: 02/27/2024] [Indexed: 04/04/2024] Open
Abstract
High-degree atrioventricular node block is a known cause of bradycardia. Heart rate and QT interval have an inverse relation. Therefore, bradycardia can lead to prolonged QT interval, which can predispose patients to Torsades de Pointes, a life-threatening arrhythmia. Correcting the underlying etiology can often reverse the arrhythmia and prevent recurrence. For this reason, recognizing the etiology of this arrhythmia plays an essential role in management.
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Affiliation(s)
- Benjamin A Szumowski
- Internal Medicine, Southwest Healthcare Medical Education Consortium, Temecula, USA
| | | | - Ramy Sadek
- Cardiology, Southwest Healthcare Medical Education Consortium, Temecula, USA
| | - Nader Attia
- Cardiology, Southwest Healthcare Medical Education Consortium, Temecula, USA
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3
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Song E. Effects of hydroxychloroquine on atrial electrophysiology in in silico wild-type and PITX2 +/- atrial cardiomyocytes. Herz 2023; 48:384-392. [PMID: 36732468 PMCID: PMC9894744 DOI: 10.1007/s00059-023-05162-w] [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: 11/08/2022] [Revised: 12/07/2022] [Accepted: 12/30/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Hydroxychloroquine (HCQ) is commonly used in the treatment of autoimmune diseases and increases the risk of QT interval prolongation. However, it is unclear how HCQ affects atrial electrophysiology and the risk of atrial fibrillation (AF). METHODS We quantitatively examined the potential atrial arrhythmogenic effects of HCQ on AF using a computational model of human atrial cardiomyocytes. We measured atrial electrophysiological markers after systematically varying HCQ concentrations. RESULTS The HCQ concentrations were positively correlated with the action potential duration (APD), resting membrane potential, refractory period, APD alternans threshold, and calcium transient alternans threshold (p < 0.05). By contrast, HCQ concentrations were inversely correlated with the maximum upstroke velocity and calcium transient amplitude (p < 0.05). When the therapeutic concentration (Cmax) of HCQ was applied, HCQ increased APD90 by 1.4% in normal sinus rhythm, 1.8% in wild-type AF, and 2.6% in paired-like homeodomain transcription factor 2 (PITX2)+/- AF, but did not affect the alternans thresholds. The overall in silico results suggest no significant atrial arrhythmogenic effects of HCQ at Cmax, instead implying a potential antiarrhythmic role of low-dose HCQ in AF. However, at an HCQ concentration of fourfold Cmax, a rapid pacing rate of 4 Hz induced prominent APD alternans, particularly in the PITX2+/- AF model. CONCLUSION Our in silico analysis suggests a potential antiarrhythmic role of low-dose HCQ in AF. Concomitant PITX2 mutations and high-dose HCQ treatments may increase the risk of AF, and this potential genotype/dose-dependent arrhythmogenic effect of HCQ should be investigated further.
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Affiliation(s)
- Euijun Song
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.
- Yonsei University College of Medicine, Seoul, Republic of Korea.
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4
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Lima B, Razmjouei S, Bajwa MT, Shahzad Z, Shoewu OA, Ijaz O, Mange P, Khanal S, Gebregiorgis T. Polypharmacy, Gender Disparities, and Ethnic and Racial Predispositions in Long QT Syndrome: An In-Depth Review. Cureus 2023; 15:e46009. [PMID: 37900391 PMCID: PMC10600617 DOI: 10.7759/cureus.46009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2023] [Indexed: 10/31/2023] Open
Abstract
Long QT syndrome (LQTS) is a complex disorder of cardiac electrophysiology. It is characterized by delayed myocardial polarization leading to QT prolongation and alterations on the ST segment and T wave visible on electrocardiogram (ECG). Syncope is a common manifestation, and torsade de pointes (TdP) can lead to sudden cardiac death. Three major LQTS genes (KCI31, KCNH2, and SCN5) lead to most of the cases of LQTS. Lifestyle modifications, beta blockers, and implantable cardioverter defibrillator (ICD) placement are the main treatments for LQTS. Polypharmacy, including QT-prolonging drugs, has been shown to worsen LQTS. The impact on potassium channels and the human ether-a-go-go-related gene (hERG) is the mechanism behind the QT interval prolongation caused by these medications. There is an increased incidence of LQTS among African-American men and women as compared to Caucasians. Women with LQTS tend to have a higher mortality rate from the condition, especially during menstruation and shortly after giving birth. Genetic testing is reserved to those patientswho exhibit either a strong clinical index of suspicion or experience persistent QT prolongation despite their lack of symptoms. Knowing the genetics, racial, and gender discrepancies can help improve patient management and a better comprehension on each case. Proper understanding of how ion channels function and their interaction with medications will lead to a better comprehension and to develop effective forms to treat those patients.
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Affiliation(s)
- Bruno Lima
- Medicine, University of Grande Rio, Rio Grande, USA
| | - Soha Razmjouei
- Anesthesiology, Case Western Reserve University School of Medicine, Cleveland, USA
| | | | - Zoha Shahzad
- Internal Medicine, Fatima Jinnah Medical University, Lahore, PAK
| | | | - Osama Ijaz
- Internal Medicine, Services Hospital Lahore, Lahore, PAK
| | - Pooja Mange
- Internal Medicine, K.J. Somaiya Hospital and Research Center, Mumbai, IND
| | | | - Tsion Gebregiorgis
- General Practice, Addis Ababa University Medical Faculty, Addis Ababa, ETH
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5
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Ray L, Geier C, DeWitt KM. Pathophysiology and treatment of adults with arrhythmias in the emergency department, part 2: Ventricular and bradyarrhythmias. Am J Health Syst Pharm 2023; 80:1123-1136. [PMID: 37235971 DOI: 10.1093/ajhp/zxad115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Indexed: 05/28/2023] Open
Abstract
PURPOSE This is the second article in a 2-part series reviewing the pathophysiology and treatment considerations for arrhythmias. Part 1 of the series discussed aspects related to treating atrial arrhythmias. Here in part 2, the pathophysiology of ventricular arrhythmias and bradyarrhythmias and current evidence on treatment approaches are reviewed. SUMMARY Ventricular arrhythmias can arise suddenly and are a common cause of sudden cardiac death. Several antiarrhythmics may be effective in management of ventricular arrhythmias, but there is robust evidence to support the use of only a few of these agents, and such evidence was largely derived from trials involving patients with out-of-hospital cardiac arrest. Bradyarrhythmias range from asymptomatic mild prolongation of nodal conduction to severe conduction delays and impending cardiac arrest. Vasopressors, chronotropes, and pacing strategies require careful attention and titration to minimize adverse effects and patient harm. CONCLUSION Ventricular arrhythmias and bradyarrhythmias can be consequential and require acute intervention. As experts in pharmacotherapy, acute care pharmacists can participate in providing high-level intervention by aiding in diagnostic workup and medication selection.
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Affiliation(s)
- Lance Ray
- Denver Health and Hospital Authority, Denver, CO, and Department of Emergency Medicine, University of Colorado, Aurora, CO, USA
| | - Curtis Geier
- San Francisco General Hospital, San Francisco, CA, USA
| | - Kyle M DeWitt
- University of Vermont Medical Center, Burlington, VT, USA
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6
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Pan D, Li B, Wang S. Establishment and validation of a torsade de pointes prediction model based on human iPSC‑derived cardiomyocytes. Exp Ther Med 2022; 25:61. [PMID: 36588805 PMCID: PMC9780517 DOI: 10.3892/etm.2022.11760] [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: 06/08/2022] [Accepted: 09/26/2022] [Indexed: 12/14/2022] Open
Abstract
Drug-induced cardiotoxicity is one of the main causes of drug failure, which leads to subsequent withdrawal from pharmaceutical development. Therefore, identifying the potential toxic candidate in the early stages of drug development is important. Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) are a useful tool for assessing candidate compounds for arrhythmias. However, a suitable model using hiPSC-CMs to predict the risk of torsade de pointes (TdP) has not been fully established. The present study aimed to establish a predictive TdP model based on hiPSC-CMs. In the current study, 28 compounds recommended by the Comprehensive in vitro Proarrhythmia Assay (CiPA) were used as training set and models were established in different risk groups, high- and intermediate-risk versus low-risk groups. Subsequently, six endpoints of electrophysiological responses were used as potential model predictors. Accuracy, sensitivity and area under the curve (AUC) were used as evaluation indices of the models and seven compounds with known TdP risk were used to verify model differentiation and calibration. The results showed that among the seven models, the AUC of logistic regression and AdaBoost model was higher and had little difference in both training and test sets, which indicated that the discriminative ability and model stability was good and excellent, respectively. Therefore, these two models were taken as submodels, similar weight was configured and a new TdP risk prediction model was constructed using a soft voting strategy. The classification accuracy, sensitivity and AUC of the new model were 0.93, 0.95 and 0.92 on the training set, respectively and all 1.00 on the test set, which indicated good discrimination ability on both training and test sets. The risk threshold was defined as 0.50 and the consistency between the predicted and observed results were 92.8 and 100% on the training and test sets, respectively. Overall, the present study established a risk prediction model for TdP based on hiPSC-CMs which could be an effective predictive tool for compound-induced arrhythmias.
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Affiliation(s)
- Dongsheng Pan
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China,National Center for Safety Evaluation of Drugs, National Institutes for Food and Drug Control, Beijing 100176, P.R. China
| | - Bo Li
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China,National Center for Safety Evaluation of Drugs, National Institutes for Food and Drug Control, Beijing 100176, P.R. China
| | - Sanlong Wang
- National Center for Safety Evaluation of Drugs, National Institutes for Food and Drug Control, Beijing 100176, P.R. China,Correspondence to: Professor Sanlong Wang, National Center for Safety Evaluation of Drugs, National Institutes for Food and Drug Control, A8 Hongda Middle Street, Beijing Economic-Technological Development Area, Beijing 100176, P.R. China
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7
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Bairashevskaia AV, Belogubova SY, Kondratiuk MR, Rudnova DS, Sologova SS, Tereshkina OI, Avakyan EI. Update of Takotsubo cardiomyopathy: Present experience and outlook for the future. IJC HEART & VASCULATURE 2022; 39:100990. [PMID: 35281752 PMCID: PMC8913320 DOI: 10.1016/j.ijcha.2022.100990] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 11/21/2022]
Abstract
Takotsubo cardiomyopathy (TTS) has become a recognised clinical entity since the Japanese scientist Sato first described it in 1990. Despite an increasing number of confirmed cases, especially during the COVID-19 pandemic, its pathophysiology remains incompletely understood, and decision-making differs in the diagnosis and treatment. In addition, it is not evident whether a significant increase in TTS is due to better understanding among practitioners and widespread access to coronary angiography, or if it is a reflection of an actual increase in incidence. We analysed a series of international research studies from 1990 to 2021. Beyond epidemiology and clinical presentation, we evaluated and summarised fundamental knowledge about various predisposing factors, with particular attention to the iatrogenic impact of certain drugs, namely antidepressants, chemotherapy, and antiarrhythmics. Furthermore, we highlighted the main pathophysiological theories to date. In addition, based on published studies and clinical cases, we investigated the role of numerous diagnostic approaches in the differential diagnosis of TTS and identified predictors of TTS complications, such as cardiogenic shock, ventricular fibrillation, and left ventricular thrombi. Accordingly, we sought to propose a diagnostic algorithm and further treatment management of TTS under the presence of possible complications to help practitioners make more informed decisions, as the initial presentation continues to pose a challenge due to its close similarity to acute coronary syndrome with ST-elevation. In conclusion, this article examines Takotsubo cardiomyopathy from different perspectives and, along with future systematic reviews and meta-analyses, can be of particular interest to practising cardiologists and researchers in developing clinical guidelines.
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Affiliation(s)
- Anastasiia V. Bairashevskaia
- Department of Paediatrics, Institute of Child’s Health, Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Sofiya Y. Belogubova
- Department of Faculty Therapy, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
- AMEE International Networking Centre, Sechenov First Moscow State Medical University (Sechenov University), 123242 Moscow, Russia
| | - Mikhail R. Kondratiuk
- Department of Faculty Therapy, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
| | - Daria S. Rudnova
- International School “Medicine of the Future”, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
| | - Susanna S. Sologova
- Department of Pharmacology, Institute of Pharmacy, Sechenov First Moscow State Medical University (Sechenov University), 119571 Moscow, Russia
| | - Olga I. Tereshkina
- Department of Pharmacology, Institute of Pharmacy, Sechenov First Moscow State Medical University (Sechenov University), 119571 Moscow, Russia
| | - Esma I. Avakyan
- Department of Faculty Therapy, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
- AMEE International Networking Centre, Sechenov First Moscow State Medical University (Sechenov University), 123242 Moscow, Russia
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8
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Ahuja P, Walian A, Magoon R, Kashav R. Amiodarone in junctional ectopic tachycardia: A word of caution! J Anaesthesiol Clin Pharmacol 2021; 37:302-304. [PMID: 34349389 PMCID: PMC8289648 DOI: 10.4103/joacp.joacp_403_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/03/2020] [Accepted: 03/12/2020] [Indexed: 11/17/2022] Open
Affiliation(s)
- Pooja Ahuja
- Department of Cardiac Anaesthesia, Atal Bihari Vajpayee Institute of Medical Sciences (ABVIMS) and Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi, India
| | - Ashish Walian
- Department of Cardiac Anaesthesia, Atal Bihari Vajpayee Institute of Medical Sciences (ABVIMS) and Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi, India
| | - Rohan Magoon
- Department of Cardiac Anaesthesia, Atal Bihari Vajpayee Institute of Medical Sciences (ABVIMS) and Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi, India
| | - Ramesh Kashav
- Department of Cardiac Anaesthesia, Atal Bihari Vajpayee Institute of Medical Sciences (ABVIMS) and Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi, India
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9
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Qi Z, Yang S, Li M, Qu J, Han Q, Zheng J, Wang H. Risk factors and predictors of QTc prolongation in critically ill Chinese patients. Am J Emerg Med 2021; 49:24-28. [PMID: 34051398 DOI: 10.1016/j.ajem.2021.05.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND To recognize and validate the predictor of risk factors for ICU patients with QTc intervals ≥500 ms. METHODS We retrospectively reviewed 160 ICU patients with their medical electronic records including all demographic data, diagnosis measurements, ECGs and medication from March 1, 2018 to December 1, 2018. All information of patients' baseline, comorbidities, electrolytes and Long QT syndrome (LQTS)-inducing medications of patients with QT interval corrected (QTc) ≥ 500 ms (n = 80) and <500 ms (n = 80) were collected and analyzed using univariate and multivariate analyses to find predictors. RESULTS Comparing to patients with QTc < 500 ms, patients with QTc ≥ 500 ms had increased SOFA (P = 0.010) and APACHE II scores (P = 0.002), longer lengths of ICU stays (P < 0.001), greater incidence of congestive heart failure (P = 0.005) and more preset risk factors (P < 0.001). The frequency of administration of mosapride (P = 0.015), amiodarone (P = 0.027) and number of combined LQTS-inducing medications (P = 0.012) were greater in patients with QTc ≥ 500 ms than in those with QTc < 500 ms. But after multivariate analysis, we found that risk factors related to a QTc ≥ 500 ms were only congestive heart failure (OR: 5.28), number of combined LQTS-inducing medications (OR: 1.60) and APACHE II score (OR: 1.08). CONCLUSIONS For critically ill patients, congestive heart failure, number of combined LQTS-inducing medications and APACHE II score are proved as risk factors associated with QTc > 500 ms.
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Affiliation(s)
- Zhidong Qi
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Sibo Yang
- Department of Pediatrics, The 1st Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ming Li
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jingdong Qu
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Qiuyuan Han
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Junbo Zheng
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Huaiquan Wang
- Department of Critical Care, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.
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10
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Vanneman MW, Madhok J, Weimer JM, Dalia AA. Perioperative Implications of the 2020 American Heart Association Scientific Statement on Drug-Induced Arrhythmias-A Focused Review. J Cardiothorac Vasc Anesth 2021; 36:952-961. [PMID: 34144871 DOI: 10.1053/j.jvca.2021.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 11/11/2022]
Abstract
The recently released American Heart Association (AHA) scientific statement on drug-induced arrhythmias discussed medications commonly associated with bradycardia, supraventricular tachycardias, and ventricular arrhythmias. The foundational data for this statement were collected from general outpatient and inpatient populations. Patients undergoing surgical and minimally invasive treatments are a unique subgroup, because they may experience hemodynamic changes associated with anesthesia and their procedure, receive multiple drug combinations not given in either inpatient or outpatient settings, or experience postprocedural inflammatory syndromes. Accordingly, the generalizability of the AHA scientific statement to this perioperative population is unclear. This focused review highlights important aspects of the new AHA scientific statement and their application to the perioperative setting. The authors review medications frequently encountered and given by anesthesiologists and their risk of drug-induced arrhythmias and discuss common anesthetic and adjunctive medications and their associated risks of bradycardia, atrial fibrillation, torsades de pointes, and drug-induced Brugada syndrome. In many instances, the risk of arrhythmia reported by the AHA scientific statement in the general population appeared to be higher than found in perioperative arenas. Furthermore, the authors discuss the arrhythmia risk of additional medications commonly ordered or administered by anesthesiologists that are not included in the AHA scientific statement. As patient and procedural complexity increases and novel anesthetic combinations propagate, further research and observational studies will be required to delineate further perioperative risks for drug-induced arrhythmia.
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Affiliation(s)
- Matthew W Vanneman
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA.
| | - Jai Madhok
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA
| | - Jonathan M Weimer
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA
| | - Adam A Dalia
- Department of Anesthesiology, Pain Medicine, and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
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11
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Takahashi K, Yamashita M, Sakaue T, Enomoto D, Uemura S, Okura T, Ikeda S, Takemoto M, Utsunomiya Y, Hyodo T. Suppression of amiodarone-induced torsade de pointes by landiolol in a patient with atrial fibrillation-mediated cardiomyopathy. Ann Noninvasive Electrocardiol 2021; 26:e12842. [PMID: 33755267 PMCID: PMC8588365 DOI: 10.1111/anec.12842] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 12/28/2022] Open
Abstract
An elderly Japanese woman developed acute decompensated heart failure caused by persistent atrial fibrillation (AF) and left ventricular systolic dysfunction. Approximately 6 days after starting intravenous administration of amiodarone (600 mg/day) for maintaining sinus rhythm after cardioversion of AF, electrocardiograms revealed a prolonged QT interval associated with torsade de pointes (TdP). The amiodarone-induced TdP disappeared after intravenous administration of landiolol plus magnesium and potassium, without discontinuation of amiodarone or overdrive cardiac pacing, although the prolonged QT interval persisted. To the best of our knowledge, this is the first report that landiolol could be effective for amiodarone-induced TdP.
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Affiliation(s)
- Koji Takahashi
- Department of Community Emergency Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.,Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Mina Yamashita
- Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Tomoki Sakaue
- Department of Community Emergency Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.,Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Daijiro Enomoto
- Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Shigeki Uemura
- Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Takafumi Okura
- Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Shuntaro Ikeda
- Department of Community Emergency Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.,Department of Cardiology, Yawatahama City General Hospital, Ehime, Japan
| | - Masafumi Takemoto
- Department of Medical Engineering, Yawatahama City General Hospital, Ehime, Japan
| | - Yutaka Utsunomiya
- Department of Medical Engineering, Yawatahama City General Hospital, Ehime, Japan
| | - Takashi Hyodo
- Department of Medical Engineering, Yawatahama City General Hospital, Ehime, Japan
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12
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Nordkin I, Levinas T, Rosenfeld I, Halabi M. Torsades de pointes after prolonged intravenous amiodarone therapy for atrial fibrillation. Clin Case Rep 2021; 9:391-394. [PMID: 33489188 PMCID: PMC7813084 DOI: 10.1002/ccr3.3539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/22/2020] [Accepted: 10/12/2020] [Indexed: 11/06/2022] Open
Abstract
Amiodarone can induce TdP; therefore, it should be avoided as a first choice for therapy in patients without heart disease. Careful QT interval monitoring, especially during intravenous use, can prevent development of this life-threatening arrhythmia.
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Affiliation(s)
- Irina Nordkin
- Ziv Medical CenterCardiology DepartmentTzfatIsrael
- The Azrieli Faculty of MedicineBar‐Ilan UniversityIsrael
| | - Tatyana Levinas
- The Azrieli Faculty of MedicineBar‐Ilan UniversityIsrael
- Ziv Medical CenterHeart Rehabilitation DepartmentTzfatIsrael
| | - Inna Rosenfeld
- Ziv Medical CenterCardiology DepartmentTzfatIsrael
- The Azrieli Faculty of MedicineBar‐Ilan UniversityIsrael
| | - Majdi Halabi
- Ziv Medical CenterCardiology DepartmentTzfatIsrael
- The Azrieli Faculty of MedicineBar‐Ilan UniversityIsrael
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13
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Yonai R, Kawabata M, Maeda S, Kawashima T, Tsuda Y, Nakasone T, Nakane H, Hirao K. Torsade de pointes induced by intravenous amiodarone therapy accompanied by marked augmentation of the transmural dispersion of repolarization in a patient with tachycardia-induced-cardiomyopathy. Ann Noninvasive Electrocardiol 2020; 26:e12810. [PMID: 33070441 PMCID: PMC8164138 DOI: 10.1111/anec.12810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/13/2020] [Accepted: 09/26/2020] [Indexed: 11/30/2022] Open
Abstract
We report a 77-year-old human on renal dialysis for end-stage renal disease with heart failure and atrial fibrillation (AF) complicated by a high ventricular frequency. The underlying disease was thought as tachycardia-induced-cardiomyopathy. Intravenous infusion of amiodarone was initiated, and direct current cardioversion succeeded in converting AF to sinus rhythm. Then, excessive increases in the QT and Tpeak-Tend (Tp-e) intervals were seen and hypokalemia induced by hemodialysis led to the development of numerous episodes of torsades de pointes (TdP). Magnesium repletion was effective in preventing TdP, while Tp-e intervals returned to the previous values 2 days after the discontinuation of amiodarone.
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Affiliation(s)
- Ryo Yonai
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Mihoko Kawabata
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Shingo Maeda
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Tomoyuki Kawashima
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Yasuhide Tsuda
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Takashi Nakasone
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Hiroki Nakane
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
| | - Kenzo Hirao
- Division of Cardiovascular Medicine, AOI Universal Hospital, Kanagawa, Japan
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14
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Stabenau HF, Shen C, Zimetbaum P, Buxton AE, Tereshchenko LG, Waks JW. Global electrical heterogeneity associated with drug-induced torsades de pointes. Heart Rhythm 2020; 18:57-62. [PMID: 32781158 DOI: 10.1016/j.hrthm.2020.07.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Drugs belonging to diverse therapeutic classes can prolong myocardial refractoriness or slow conduction. These drugs may be effective and well-tolerated, but the risk of sudden cardiac death from torsades de pointes (TdP) remains a major concern. The corrected QT interval has significant limitations when used for risk stratification. Measurement of global electrical heterogeneity (GEH) could help identify the substrate vulnerable to drug-induced ventricular arrhythmias. OBJECTIVE The purpose of this study was to improve risk stratification for drug-induced TdP by measuring GEH on the electrocardiogram (ECG). METHODS We analyzed ECG data from a case-control study of patients with a history of drug-induced TdP as well as age- and sex-matched controls. Vectorcardiograms were constructed from ECGs. GEH was measured via the spatial ventricular gradient (SVG) vector (magnitude, azimuth, and elevation). Log odds coefficients for TdP were estimated using multivariable logistic regression. RESULTS Among 17 cases (47% male; age 58.9 ± 12.5 years) and 17 controls (29% male; age 61.0 ± 12.2 years), 34 ECGs were analyzed. SVG azimuth was significantly different between cases and controls (3.4 vs 22.0 degrees, respectively; P = 0.02). After adjusting for sex and QTc interval, odds of TdP increased by a factor of 3.2 for each 1 SD change in SVG azimuth from the control group mean (95% confidence interval 1.07-9.14; P = .04). QTc was not significant in the multivariable analysis (P = .20). CONCLUSION SVG azimuth is correlated with a history of drug-induced TdP independent of QTc. GEH measurement may help identify patients at high risk for drug-induced arrhythmias.
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Affiliation(s)
- Hans F Stabenau
- Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Changyu Shen
- Smith Center for Outcomes Research in Cardiology, Harvard Medical School, Boston, Massachusetts
| | - Peter Zimetbaum
- Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Alfred E Buxton
- Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Larisa G Tereshchenko
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Oregon
| | - Jonathan W Waks
- Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.
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15
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Alí A, Boutjdir M, Aromolaran AS. Cardiolipotoxicity, Inflammation, and Arrhythmias: Role for Interleukin-6 Molecular Mechanisms. Front Physiol 2019; 9:1866. [PMID: 30666212 PMCID: PMC6330352 DOI: 10.3389/fphys.2018.01866] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/11/2018] [Indexed: 12/12/2022] Open
Abstract
Fatty acid infiltration of the myocardium, acquired in metabolic disorders (obesity, type-2 diabetes, insulin resistance, and hyperglycemia) is critically associated with the development of lipotoxic cardiomyopathy. According to a recent Presidential Advisory from the American Heart Association published in 2017, the current average dietary intake of saturated free-fatty acid (SFFA) in the US is 11–12%, which is significantly above the recommended <10%. Increased levels of circulating SFFAs (or lipotoxicity) may represent an unappreciated link that underlies increased vulnerability to cardiac dysfunction. Thus, an important objective is to identify novel targets that will inform pharmacological and genetic interventions for cardiomyopathies acquired through excessive consumption of diets rich in SFFAs. However, the molecular mechanisms involved are poorly understood. The increasing epidemic of metabolic disorders strongly implies an undeniable and critical need to further investigate SFFA mechanisms. A rapidly emerging and promising target for modulation by lipotoxicity is cytokine secretion and activation of pro-inflammatory signaling pathways. This objective can be advanced through fundamental mechanisms of cardiac electrical remodeling. In this review, we discuss cardiac ion channel modulation by SFFAs. We further highlight the contribution of downstream signaling pathways involving toll-like receptors and pathological increases in pro-inflammatory cytokines. Our expectation is that if we understand pathological remodeling of major cardiac ion channels from a perspective of lipotoxicity and inflammation, we may be able to develop safer and more effective therapies that will be beneficial to patients.
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Affiliation(s)
- Alessandra Alí
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Mohamed Boutjdir
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Medicine, New York University School of Medicine, New York, NY, United States
| | - Ademuyiwa S Aromolaran
- Cardiovascular Research Program, VA New York Harbor Healthcare System, Brooklyn, NY, United States.,Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, United States.,Department of Pharmacology, State University of New York Downstate Medical Center, Brooklyn, NY, United States
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