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Shakibfar S, Yazdchi M, Aliakbaryhosseinabadi S. Predicting Electrical Storm Using Episodes' Parameters from ICD Recorded Data. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2019:4885-4888. [PMID: 31946955 DOI: 10.1109/embc.2019.8857720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Electrical storm (ES) is a life-threatening heart condition for patients with implantable cardioverter defibrillators (ICDs). ICD patients experienced episodes are at higher risk for ES. However, predicting ES using previous episodes' parameters recorded by ICDs have never been developed. This study aims to predict ES using machine learning models based on ICD remote monitoring-summaries during episodes in the anonymized large number of patients. Episode ICD-summaries from 16,022 patients were used to construct and evaluate two models, logistic regression and random forest, for predicting the short-term risk of ES. Episode parameters in this study included the total number of sustained episodes, shocks delivered and the cycle length parameters. The models evaluated on the data sections not used for model development. Random forest performed significantly better than logistic regression (P <; 0.01), achieving a test accuracy of 0.99 and an Area Under an ROC Curve (AUC) of 0.93 (vs. an accuracy of 0.98 and an AUC of 0.90). The total number of previous sustained episodes was the most relevant variables in the both models.
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Halliday BP, Cleland JGF, Goldberger JJ, Prasad SK. Personalizing Risk Stratification for Sudden Death in Dilated Cardiomyopathy: The Past, Present, and Future. Circulation 2017; 136:215-231. [PMID: 28696268 PMCID: PMC5516909 DOI: 10.1161/circulationaha.116.027134] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Results from the DANISH Study (Danish Study to Assess the Efficacy of ICDs in Patients With Non-Ischemic Systolic Heat Failure on Mortality) suggest that for many patients with dilated cardiomyopathy (DCM), implantable cardioverter-defibrillators do not increase longevity. Accurate identification of patients who are more likely to die of an arrhythmia and less likely to die of other causes is required to ensure improvement in outcomes and wise use of resources. Until now, left ventricular ejection fraction has been used as a key criterion for selecting patients with DCM for an implantable cardioverter-defibrillator for primary prevention purposes. However, registry data suggest that many patients with DCM and an out-of-hospital cardiac arrest do not have a markedly reduced left ventricular ejection fraction. In addition, many patients with reduced left ventricular ejection fraction die of nonsudden causes of death. Methods to predict a higher or lower risk of sudden death include the detection of myocardial fibrosis (a substrate for ventricular arrhythmia), microvolt T-wave alternans (a marker of electrophysiological vulnerability), and genetic testing. Midwall fibrosis is identified by late gadolinium enhancement cardiovascular magnetic resonance imaging in ≈30% of patients and provides incremental value in addition to left ventricular ejection fraction for the prediction of sudden cardiac death events. Microvolt T-wave alternans represents another promising predictor, supported by large meta-analyses that have highlighted the negative predictive value of this test. However, neither of these strategies have been routinely adopted for risk stratification in clinical practice. More convincing data from randomized trials are required to inform the management of patients with these features. Understanding of the genetics of DCM and how specific mutations affect arrhythmic risk is also rapidly increasing. The finding of a mutation in lamin A/C, the cause of ≈6% of idiopathic DCM, commonly underpins more aggressive management because of the malignant nature of the associated phenotype. With the expansion of genetic sequencing, the identification of further high-risk mutations appears likely, leading to better-informed clinical decision making and providing insight into disease mechanisms. Over the next 5 to 10 years, we expect these techniques to be integrated into the existing algorithm to form a more sensitive, specific, and cost-effective approach to the selection of patients with DCM for implantable cardioverter-defibrillator implantation.
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Affiliation(s)
- Brian P Halliday
- From CMR Unit and Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom (B.P.H., S.K.P.), National Heart and Lung Institute Imperial College, London, United Kingdom (B.P.H., S.K.P., J.G.F.C.); Robertson Centre for Biostatistics, University of Glasgow, United Kingdom (J.G.F.C.); and Leonard M. Miller School of Medicine, University of Miami, FL (J.J.G.)
| | - John G F Cleland
- From CMR Unit and Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom (B.P.H., S.K.P.), National Heart and Lung Institute Imperial College, London, United Kingdom (B.P.H., S.K.P., J.G.F.C.); Robertson Centre for Biostatistics, University of Glasgow, United Kingdom (J.G.F.C.); and Leonard M. Miller School of Medicine, University of Miami, FL (J.J.G.)
| | - Jeffrey J Goldberger
- From CMR Unit and Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom (B.P.H., S.K.P.), National Heart and Lung Institute Imperial College, London, United Kingdom (B.P.H., S.K.P., J.G.F.C.); Robertson Centre for Biostatistics, University of Glasgow, United Kingdom (J.G.F.C.); and Leonard M. Miller School of Medicine, University of Miami, FL (J.J.G.)
| | - Sanjay K Prasad
- From CMR Unit and Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom (B.P.H., S.K.P.), National Heart and Lung Institute Imperial College, London, United Kingdom (B.P.H., S.K.P., J.G.F.C.); Robertson Centre for Biostatistics, University of Glasgow, United Kingdom (J.G.F.C.); and Leonard M. Miller School of Medicine, University of Miami, FL (J.J.G.).
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Hawkins NM, Virani SA, Sperrin M, Buchan IE, McMurray JJ, Krahn AD. Predicting heart failure decompensation using cardiac implantable electronic devices: a review of practices and challenges. Eur J Heart Fail 2015; 18:977-86. [DOI: 10.1002/ejhf.458] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 10/01/2015] [Accepted: 10/29/2015] [Indexed: 11/07/2022] Open
Affiliation(s)
| | - Sean A. Virani
- Division of Cardiology; University of British Columbia; Vancouver Canada
| | - Matthew Sperrin
- Centre for Health Informatics, Institute of Population Health; University of Manchester; Manchester UK
| | - Iain E. Buchan
- Centre for Health Informatics, Institute of Population Health; University of Manchester; Manchester UK
| | - John J.V. McMurray
- Glasgow Cardiovascular Research Centre; University of Glasgow; Glasgow UK
| | - Andrew D. Krahn
- Division of Cardiology; University of British Columbia; Vancouver Canada
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Obeyesekere MN, Leong-Sit P, Krahn AD, Gula LJ, Yee R, Skanes AC, Klein GJ. Asymptomatic Wolff-Parkinson-White Syndrome: Who Should Be Treated? Card Electrophysiol Clin 2012; 4:273-280. [PMID: 26939946 DOI: 10.1016/j.ccep.2012.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This article discusses the merits of electrophysiology study (EPS) and/or ablation for asymptomatic preexcitation Wolff-Parkinson-White (WPW) ECG pattern. Sudden deaths in asymptomatic patients are too few to merit broad screening and aggressive intervention. It also discusses the risks of ablation and the low predictive accuracy of EPS. When WPW is an incidental finding, the decision to proceed with investigation and ablation can be made considering patients' situations and preferences. An invasive strategy is targeted at patients concerned about the low risk of life-threatening arrhythmia as a first presentation after a discussion of the risks and benefits.
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Affiliation(s)
- Manoj N Obeyesekere
- Division of Cardiology, Western University, 339 Windermere Road, C6-110, London, Ontario N6A 5A5, Canada
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Tereshchenko LG, Ghanem RN, Abeyratne A, Swerdlow CD. Intracardiac QT integral on far-field ICD electrogram predicts sustained ventricular tachyarrhythmias in ICD patients. Heart Rhythm 2011; 8:1889-94. [PMID: 21802390 DOI: 10.1016/j.hrthm.2011.07.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 07/23/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND Prediction of sustained ventricular tachycardia (VT)/ventricular fibrillation (VF) could help to guide preventive interventions in at-risk patients. The QRST integral (∫QT) reflects intrinsic repolarization properties. OBJECTIVE The objective of this study was to determine whether intracardiac ∫QT predicts VT/VF in the next few months in patients with implantable cardioverter defibrillators (ICDs). METHODS Far-field (FF) and near-field (NF) right ventricular intracardiac electrograms (EGMs) were recorded via telemetry in 46 patients with structural heart disease and ICDs implanted for secondary prevention of sudden cardiac death. Epochs of 4.9 ± 0.4 minutes during sinus rhythm (mean heart rate 70.9 ± 15.2 beats/min) and ventricular pacing at 105 beats/min were analyzed. Mean ∫QT was calculated on FF and NF EGMs as the algebraic sum of areas under the QRST curve and adjusted by mean heart rate. Patients were followed up for at least 3 months. True VT/VF events treated by the ICD served as the end point. RESULTS During a mean follow-up of 4.6 months, 22 patients (48%) were treated for VT/VF. Unadjusted and adjusted by heart rate, FF EGM ∫QT in sinus rhythm was a significant predictor of VT/VF (unadjusted ∫QT hazard ratio 1.007; 95% confidence interval 1.002 to 1.0013; P = .007; adjusted ∫QT hazard ratio 1.68; 95% confidence interval 1.19 to 2.36; P = .002). The highest quartile of intracardiac ∫QT predicted VT/VF (log-rank test P = .042) and identified patients at risk with a specificity of 86% and positive predictive value of 73%. CONCLUSION Increased intracardiac FF EGM ∫QT predicts VT/VF in patients with structural heart disease and secondary prevention ICDs.
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Affiliation(s)
- Larisa G Tereshchenko
- Division of Cardiology, Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA.
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Affiliation(s)
- Nils P. Johnson
- From the Division of Cardiology (N.P.J., C.J.D.), Department of Medicine, Northwestern University, Feinberg School of Medicine, Chicago, IL; and Weatherhead P.E.T. Center For Preventing and Reversing Atherosclerosis (N.P.J.), Division of Cardiology, Department of Medicine, University of Texas Medical School and Memorial Hermann Hospital, Houston, TX
| | - Charles J. Davidson
- From the Division of Cardiology (N.P.J., C.J.D.), Department of Medicine, Northwestern University, Feinberg School of Medicine, Chicago, IL; and Weatherhead P.E.T. Center For Preventing and Reversing Atherosclerosis (N.P.J.), Division of Cardiology, Department of Medicine, University of Texas Medical School and Memorial Hermann Hospital, Houston, TX
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