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Sharma N, Sunkaria RK. Improved T-wave detection in electrocardiogram signals based non-stationary wavelet transform and QRS complex cancellation with kurtosis analysis. Physiol Meas 2023; 44:125001. [PMID: 37944176 DOI: 10.1088/1361-6579/ad0b3e] [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: 06/29/2023] [Accepted: 11/09/2023] [Indexed: 11/12/2023]
Abstract
Objective. The T-wave in electrocardiogram (ECG) signal has the potential to enumerate various cardiac dysfunctions in the cardiovascular system. The primary objective of this research is to develop an efficient method for detecting T-waves in ECG signals, with potential applications in clinical diagnosis and continuous patient monitoring.Approach. In this work, we propose a novel algorithm for T-wave peak detection, which relies on a non-decimated stationary wavelet transform method (NSWT) and involves the cancellation of the QRS complex by utilizing its local extrema. The proposed scheme contains three stages: firstly, the technique is pre-processed using a two-stage median filter and Savitzky-Golay (SG) filter to remove the various artifacts from the ECG signal. Secondly, the NSWT technique is implemented using the bior 4.4 mother wavelet without downsampling, employing 24scale analysis, and involves the cancellation of QRS-complex using its local positions. After that, Sauvola technique is used to estimate the baseline and remove the P-wave peaks to enhance T-peaks for accurate detection in the ECG signal. Additionally, the moving average window and adaptive thresholding are employed to enhance and identify the location of the T-wave peaks. Thirdly, false positive T-peaks are corrected using the kurtosis coefficients method.Main results. The robustness and efficiency of the proposed technique have been corroborated by the QT database (QTDB). The results are also validated on a self-recorded database. In QTDB database, the sensitivity of 98.20%, positive predictivity of 99.82%, accuracy of 98.04%, and detection error rate of 1.95% have been achieved. The self-recorded dataset attains a sensitivity, positive predictivity, accuracy, and detection error rate of 99.94%, 99.96%, 99.90%, and 0.09% respectively.Significance. A T-wave peak detection based on NSWT and QRS complex cancellation, along with kurtosis analysis technique, demonstrates superior performance and enhanced detection accuracy compared to state-of-the-art techniques.
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Affiliation(s)
- Neenu Sharma
- Department of Electronics and Communication Engineering, Dr B.R. Ambedkar National Institute of Technology, Jalandhar 144011, India
| | - Ramesh Kumar Sunkaria
- Department of Electronics and Communication Engineering, Dr B.R. Ambedkar National Institute of Technology, Jalandhar 144011, India
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Abdelmegid MAKF, Bakr MM, Shams-Eddin H, Youssef AA, Abdel-Galeel A. Effect of reperfusion strategy on QT dispersion in patients with acute myocardial infarction: Impact on in-hospital arrhythmia. World J Cardiol 2023; 15:106-115. [PMID: 37033680 PMCID: PMC10074997 DOI: 10.4330/wjc.v15.i3.106] [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: 12/12/2022] [Revised: 01/24/2023] [Accepted: 02/22/2023] [Indexed: 03/21/2023] Open
Abstract
BACKGROUND Myocardial ischemia and ST-elevation myocardial infarction (STEMI) increase QT dispersion (QTD) and corrected QT dispersion (QTcD), and are also associated with ventricular arrhythmia. AIM To evaluate the effects of reperfusion strategy [primary percutaneous coronary intervention (PPCI) or fibrinolytic therapy] on QTD and QTcD in STEMI patients and assess the impact of the chosen strategy on the occurrence of in-hospital arrhythmia. METHODS This prospective, observational, multicenter study included 240 patients admitted with STEMI who were treated with either PPCI (group I) or fibrinolytic therapy (group II). QTD and QTcD were measured on admission and 24 hr after reperfusion, and patients were observed to detect in-hospital arrhythmia. RESULTS There were significant reductions in QTD and QTcD from admission to 24 hr in both group I and group II patients. QTD and QTcD were found to be shorter in group I patients at 24 hr than those in group II (53 ± 19 msec vs 60 ± 18 msec, P = 0.005 and 60 ± 21 msec vs 69+22 msec, P = 0.003, respectively). The occurrence of in-hospital arrhythmia was significantly more frequent in group II than in group I (25 patients, 20.8% vs 8 patients, 6.7%, P = 0.001). Furthermore, QTD and QTcD were higher in patients with in-hospital arrhythmia than those without (P = 0.001 and P = 0.02, respectively). CONCLUSION In STEMI patients, PPCI and fibrinolytic therapy effectively reduced QTD and QTcD, with a higher observed reduction using PPCI. PPCI was associated with a lower incidence of in-hospital arrhythmia than fibrinolytic therapy. In addition, QTD and QTcD were shorter in patients not experiencing in-hospital arrhythmia than those with arrhythmia.
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Affiliation(s)
- Mohamed Aboel-Kassem F Abdelmegid
- Department of Cardiovascular Medicine, Assiut University Heart Hospital, Assiut University, Assiut 71526, Egypt
- Department of Cardiology, Sohag Heart and GIT Center, Sohag 85264, Egypt
| | - Mohamed M Bakr
- Department of Cardiology, Assiut Police Hospital, Assiut 71526, Egypt
| | - Hamdy Shams-Eddin
- Department of Cardiovascular Medicine, Assiut University Heart Hospital, Assiut University, Assiut 71526, Egypt
| | - Amr A Youssef
- Department of Cardiovascular Medicine, Assiut University Heart Hospital, Assiut University, Assiut 71526, Egypt
| | - Ahmed Abdel-Galeel
- Department of Cardiovascular Medicine, Assiut University Heart Hospital, Assiut University, Assiut 71526, Egypt
- Department of Cardiology, Qena General Hospital, Qena 92354, Egypt.
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Namazi MH, Salehi A, Akbarzadeh MA, Parsa SA, Safi M, Vakili H, Saadat H, Eslami V, Kiaee FH, Nourian S, Sohrabifar N, Khaheshi I. The association between QTc, QTd, TPE, and fragmented QRS before and after PPCI with hospital mortality in STEMI patients. Cardiovasc Hematol Disord Drug Targets 2022; 22:CHDDT-EPUB-126551. [PMID: 36165529 DOI: 10.2174/1871529x22666220926125709] [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: 06/06/2022] [Revised: 08/12/2022] [Accepted: 08/25/2022] [Indexed: 11/22/2022]
Abstract
INTRODUCTION ST-elevation myocardial infarction (STEMI) is known to be associated with significant arrhythmia and consequent mortality. QT prolongation is a risk factor for arrhythmia in STEMI patients who underwent primary percutaneous coronary intervention (PPCI). The aim of this investigation was to evaluate the association of corrected QT interval (QTc), QT dispersion (QTd), T-wave peak to end (TPE), and fragmented QRS with mortality in these patients. METHODS Eligible patients with the characteristic symptoms of STEMI who underwent PPCI were included. QTc, QTd, TPE, and fragmented QRS were measured before and after the PPCI. These predictors were compared between patients who died during hospitalization and discharged patients. RESULTS After coronary angiography, 10 patients (4%) died during the hospitalization after PPCI. Comparing the non-survivers and discharged patients in terms of arrhythmia predictors showed that the mean QT dispersion and TPE before intervention were significantly higher in the non-survivors. Also, the number of patients who experienced fragmented QRS both before and after the intervention was significantly higher in the non-survivors. CONCLUSION These data suggested that evaluating such arrhythmia predictors, especially before PPCI, could be used as a predictor of mortality in STEMI patients who underwent PPCI.
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Affiliation(s)
- Mohammad Hassan Namazi
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ayoub Salehi
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Akbarzadeh
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Alipoor Parsa
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Safi
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Vakili
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Habiboulah Saadat
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Vahid Eslami
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Saeed Nourian
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nasim Sohrabifar
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Isa Khaheshi
- Cardiovascular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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van der Waal J, Bear L, Meijborg V, Dubois R, Cluitmans M, Coronel R. Steep repolarization time gradients in pig hearts cause distinct changes in composite electrocardiographic T‐wave parameters. Ann Noninvasive Electrocardiol 2022; 27:e12994. [DOI: 10.1111/anec.12994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/09/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022] Open
Affiliation(s)
- Jeanne van der Waal
- Department of Experimental and Clinical Cardiology Amsterdam UMC, Location AMC Amsterdam The Netherlands
| | - Laura Bear
- IHU Liryc, Electrophysiology and Heart Modeling Institute Fondation Bordeaux Université Pessac France
- Université de Bordeaux Pessac France
- Inserm, Cardio‐Thoracix Research Centre of Bordeaux Pessac France
| | - Veronique Meijborg
- Department of Experimental and Clinical Cardiology Amsterdam UMC, Location AMC Amsterdam The Netherlands
| | - Rémi Dubois
- IHU Liryc, Electrophysiology and Heart Modeling Institute Fondation Bordeaux Université Pessac France
- Université de Bordeaux Pessac France
- Inserm, Cardio‐Thoracix Research Centre of Bordeaux Pessac France
| | - Matthijs Cluitmans
- CARIM School for Cardiovascular Diseases Maastricht University Medical Centre Maastricht The Netherlands
| | - Ruben Coronel
- Department of Experimental and Clinical Cardiology Amsterdam UMC, Location AMC Amsterdam The Netherlands
- Université de Bordeaux Pessac France
- Inserm, Cardio‐Thoracix Research Centre of Bordeaux Pessac France
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Zhu L, Cui Q, Zhang Y, Liu F, Zhao J, Wang J. Sex-Specific Associations of Anxiety With Left Ventricular Hypertrophy and Transmural Dispersion of Repolarization in Hypertensive Patients. Front Cardiovasc Med 2022; 9:858097. [PMID: 35757339 PMCID: PMC9218101 DOI: 10.3389/fcvm.2022.858097] [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: 01/20/2022] [Accepted: 05/12/2022] [Indexed: 11/17/2022] Open
Abstract
Background The previous studies have shown that individuals with hypertension and anxiety have a higher mean left ventricular mass index (LVMI) and QTc dispersion. We explored the associations between anxiety and left ventricular hypertrophy (LVH) and between anxiety and transmural dispersion of repolarization (TDR) (as detected by T peak-T end interval/QT interval, Tp–Te/QT ratio) in patients with hypertension. Methods A total of 353 patients with uncomplicated hypertension from the Shaanxi Provincial People’s Hospital were enrolled between 2017 and 2021. Anxiety was defined as a Hamilton Anxiety Scale (HAM-A) score ≥ 14. Logistic regression models were used to estimate the association between HAM-A and LVH. The association between HAM-A score and Tp–Te/QT was estimated using linear regression. Results Participants were divided into two groups based on the presence of anxiety. LVMI was significantly higher in patients with hypertension and anxiety than in those with hypertension without anxiety (no anxiety: 84.36 ± 23.82, anxiety: 105.75 ± 25.45 g/m2, p < 0.001). HAM-A score was positively correlated with LVMI (r = 0.578, p < 0.001) and with Tp–Te/QT (r = 0.252, p < 0.001). Logistic regression models showed that patients with hypertension and anxiety were at higher risk of LVH than were patients with hypertension without anxiety (adjusted OR, 2.44, 95% CI, 1.35–4.43, p = 0.003). The linear regression analysis showed that the HAM-A score was associated with Tp–Te/QT ratio (adjusted β, 0.001, 95% CI, 0.001–0.002, p = 0.013). There was an interaction between sex and anxiety for LVH risk (p for interaction = 0.035) and for increased Tp–Te/QT (p for interaction = 0.014). After stratification by sex, anxiety was associated with increased risk for LVH in men with hypertension (adjusted OR, 5.56, 95% CI, 2.07–14.98, p = 0.001), but not in women (adjusted: OR, 1.44, 95% CI, 0.64–3.26, p = 0.377) with hypertension. The HAM-A score was also positively associated with Tp–Te/QT ratio in male (adjusted β, 0.002, 95% CI, 0.001–0.003, p < 0.001), but not in women (adjusted β, 0.001, 95% CI, –0.0002–0.002, p = 0.165). Conclusion Our results indicated that anxiety was associated with LVH and with increased TDR in men with hypertension, but not in women with hypertension.
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Affiliation(s)
- Ling Zhu
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
- Department of Cardiology, The Third Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Qianwei Cui
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Yong Zhang
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Fuqiang Liu
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
- *Correspondence: Fuqiang Liu,
| | - Jingsha Zhao
- Department of Intensive Care Unit, Third People’s Hospital of Chengdu, Chengdu, China
- Jingsha Zhao,
| | - Junkui Wang
- Department of Cardiology, Shaanxi Provincial People’s Hospital, Xi’an, China
- Junkui Wang,
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Association between ventricular repolarization parameters and cardiovascular death in patients of the SWISS-AF cohort. Int J Cardiol 2022; 356:53-59. [DOI: 10.1016/j.ijcard.2022.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/10/2022] [Accepted: 03/07/2022] [Indexed: 11/18/2022]
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Terminal T-wave inversion predicts reperfusion tachyarrhythmias in STEMI. J Electrocardiol 2022; 71:28-31. [PMID: 35026678 DOI: 10.1016/j.jelectrocard.2021.12.008] [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: 09/29/2021] [Revised: 11/15/2021] [Accepted: 12/23/2021] [Indexed: 11/21/2022]
Abstract
INTRODUCTION A reliable electrocardiographic predictor of ventricular fibrillation (VF) in patients with ST elevation myocardial infarction (STEMI) is lacking so far. Previous experimental/simulation study suggested a terminal T-wave inversion (TTWI) in ischemia-related ECG leads corresponding to anterior infarct localization as an independent predictor of reperfusion VF (rVF). This T-wave characteristic has never been tested as a rVF predictor in clinical settings. The aim of this study was to test if terminal T-wave inversion (TTWI) at admission ECG (before reperfusion) can serve as a predictor of ventricular fibrillation during reperfusion (rVF) in patients with anterior STEMI undergoing primary PCI. METHODS AND RESULTS Study population included consecutive patients with anterior infarct localization admitted for primary PCI (n = 181, age 65 [57; 76] years, 66% male). Of those, 14 patients had rVF (rVF group, age 59 [47; 76] years, 64% male) and patients without rVF comprised the No-rVF group (n = 167, age 65 [57; 76] years, 66% male). Association of TTWI with rVF was analyzed using logistic regression analysis adjusted for relevant clinical and electrocardiographic covariates. The prevalence of TTWI in rVF group was 62% comparing to 23% in the No-rVF group, p = 0.005. TTWI was associated with increased risk of rVF (OR 5.51; 95% CI 1.70-17.89; p = 0.004) and remained a significant predictor after adjustment for age, gender, history of MI prior to index admission, VF before reperfusion, Tpeak-Tend, maximal ST elevation, and QRS duration (OR 23.49; 95% CI 3.14-175.91; p = 0.002). CONCLUSIONS The terminal T-wave inversion in anterior leads before PCI independently predicted rVF in patients with anterior MI thus confirming the previous experimental/simulation findings.
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Gayretli Yayla K, Yayla Ç, Erdöl MA, Karanfil M, Sunman H, Yılmaz FA, Özbeyaz NB, Özkaya İbiş AN, Tulmaç M. Tp-e/QTc ratio, SYNTAX, and GRACE score in patients who underwent coronary angiography owing to acute coronary syndrome. Anatol J Cardiol 2021; 25:887-895. [PMID: 34866583 DOI: 10.5152/anatoljcardiol.2021.31] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE Ventricular arrhythmias following acute coronary syndrome (ACS) range from benign to life-threatening fatal arrhythmias. Tpeak-end (Tp-e) interval has been shown to be an important parameter in the assessment of repolarization dispersion. We aimed to evaluate the relationship between SYNTAX and Global Registry of Acute Coronary Events (GRACE) risk score calculated on admission and Tp-e interval and Tp-e/QTc ratio. METHODS A total of 421 patients were included in the study. The patients were divided into 2 groups as low SYNTAX score (≤22) and moderate and high risk SYNTAX score (>22). According to the GRACE risk score, the patients were divided into 2 groups; high-risk patients ≥140 and <140 low-risk patients. RESULTS In the group with SYNTAX score >22, the Tp-e interval (p<0.001) and Tp-e/QTc ratio (p<0.001) was found to be significantly higher than in the group with a SYNTAX score ≤22. Tp-e interval (p<0.001) and Tp-e/QTc ratio (p=0.002) was higher in patients with GRACE risk score ≥140 compared with patients with a GRACE risk score <140. The correlation between Tp-e interval and Tp-e/QTc ratio and SYNTAX score (r=0.489; p<0.001) and GRACE risk score (r=0.274; p<0.001) were found to be significant. A significant and independent correlation was found between the SYNTAX score and Tp-e/QTc ratio (β=0.385; p<0.001). CONCLUSION Tp-e interval and Tp-e/QT ratio increased in patients with severe coronary artery disease assessed with SYNTAX score. Tp-e interval and Tp-e/QT ratio increased in patients with a high GRACE risk score.
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Affiliation(s)
- Kadriye Gayretli Yayla
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey; Department of Cardiology, Health Sciences University, Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital; Ankara-Turkey
| | - Çağrı Yayla
- Department of Cardiology, Health Sciences University, Ankara City Hospital; Ankara-Turkey
| | - Mehmet Akif Erdöl
- Department of Cardiology, Health Sciences University, Ankara City Hospital; Ankara-Turkey
| | - Mustafa Karanfil
- Department of Cardiology, Health Sciences University, Ankara City Hospital; Ankara-Turkey
| | - Hamza Sunman
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey
| | - Faruk Aydın Yılmaz
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey
| | - Nail Burak Özbeyaz
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey
| | - Ayşe Nur Özkaya İbiş
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey
| | - Murat Tulmaç
- Department of Cardiology, Health Sciences University, Dışkapı Yıldırım Beyazıt Training and Research Hospital; Ankara-Turkey
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Andršová I, Hnatkova K, Šišáková M, Toman O, Smetana P, Huster KM, Barthel P, Novotný T, Schmidt G, Malik M. Heart Rate Dependency and Inter-Lead Variability of the T Peak - T End Intervals. Front Physiol 2021; 11:595815. [PMID: 33384609 PMCID: PMC7769826 DOI: 10.3389/fphys.2020.595815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/14/2020] [Indexed: 11/24/2022] Open
Abstract
The electrocardiographic (ECG) assessment of the T peak–T end (Tpe) intervals has been used in many clinical studies, but several related physiological aspects have not been reported. Specifically, the sources of the Tpe differences between different ECG leads have not been systematically researched, the relationship of Tpe duration to underlying heart rate has not been firmly established, and little is known about the mutual correspondence of Tpe intervals measured in different ECG leads. This study evaluated 796,620 10-s 12-lead ECGs obtained from long-term Holters recorded in 639 healthy subjects (311 female) aged 33.8 ± 9.4 years. For each ECG, transformation to orthogonal XYZ lead was used to measure Tpe in the orthogonal vector magnitude (used as a reference for lead-to-lead comparisons) and to construct a three-dimensional T wave loop. The loop roundness was expressed by a ratio between its circumference and length. These ratios were significantly related to the standard deviation of Tpe durations in different ECG leads. At the underlying heart rate of 60 beats per minute, Tpe intervals were shorter in female than in male individuals (82.5 ± 5.6 vs 90.0 ± 6.5 ms, p < 0.0001). When studying linear slopes between Tpe intervals measured in different leads and the underlying heart rate, we found only minimal heart rate dependency, which was not systematic across the ECG leads and/or across the population. For any ECG lead, positive Tpe/RR slope was found in some subjects (e.g., 79 and 25% of subjects for V2 and V4 measurements, respectively) and a negative Tpe/RR slope in other subjects (e.g., 40 and 65% for V6 and V5, respectively). The steepest positive and negative Tpe/RR slopes were found for measurements in lead V2 and V4, respectively. In all leads, the Tpe/RR slope values were close to zero, indicating, on average, Tpe changes well below 2 ms for RR interval changes of 100 ms. On average, longest Tpe intervals were measured in lead V2, the shortest in lead III. The study concludes that the Tpe intervals measured in different leads cannot be combined. Irrespective of the measured ECG lead, the Tpe interval is not systematically heart rate dependent, and no heart rate correction should be used in clinical Tpe investigations.
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Affiliation(s)
- Irena Andršová
- Department of Internal Medicine and Cardiology, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Katerina Hnatkova
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Martina Šišáková
- Department of Internal Medicine and Cardiology, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Ondřej Toman
- Department of Internal Medicine and Cardiology, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czechia
| | | | - Katharina M Huster
- Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Petra Barthel
- Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Tomáš Novotný
- Department of Internal Medicine and Cardiology, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Georg Schmidt
- Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Marek Malik
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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Wattoo MA, Tabassum M, Bhutta KR, Kaneez M, Zaidi SMJ, Ijaz H, Awan J, Irshad U, Azhar MJ, Rafi Z. Correlation of Prolonged Corrected QT Interval With Ventricular Arrhythmias and In-Hospital Mortality Among ST-Elevation Myocardial Infarction Patients: A Mystique or Lucidity? Cureus 2020; 12:e12356. [PMID: 33520550 PMCID: PMC7839800 DOI: 10.7759/cureus.12356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background Ventricular arrhythmias (VAs) are a frequent cause of cardiovascular mortality, especially in developing countries. Prolongation of corrected QT (QTc) interval predisposes patients to life-threatening VAs. Our study aims to assess the correlation of prolonged QTc interval with VAs and in-hospital mortality among ST-elevation myocardial infarction (STEMI) patients. Methods This cross-sectional study analyzed the data from 40 patients with a confirmed diagnosis of STEMI and prolonged QTc interval. The patients were evaluated for several characteristics including their electrocardiography (ECG) findings. The frequency of in-hospital mortality and VAs developed after admission were recorded. Spearman correlation was used to assess the correlation of prolonged QTc interval with VAs and in-hospital mortality. Results Out of 40 cases, 30 patients were males and 10 were females with a mean age hovering at 52.95 ± 10.65 years. The mean QTc interval of our patients was 512.02 ± 49.74 milliseconds (ms). A total of 11 (27.5%) patients developed VAs while 14 (35%) of the patients succumbed to the disease complications. Spearman correlation showed a strong significant positive correlation of QTc interval with VAs (rho = 0.658, p < 0.001) and in-hospital mortality (rho = 0.314, p = 0.04). Conclusion Prolonged QTc interval is positively correlated with VAs and in-hospital mortality among STEMI patients. These patients should be regularly monitored and must be managed with caution as they have increased chances to develop VAs and in-hospital mortality. There is an utmost need for curation of guidelines that aid in risk stratification and appropriate management of such patients.
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Affiliation(s)
| | | | | | - Mehwish Kaneez
- Internal Medicine, Rawalpindi Medical University, Rawalpindi, PAK
| | | | - Hania Ijaz
- Internal Medicine, Rawalpindi Medical University, Rawalpindi, PAK
| | - Javeria Awan
- Internal Medicine, Rawalpindi Medical University, Rawalpindi, PAK
| | - Umer Irshad
- Internal Medicine, Rawalpindi Medical University, Rawalpindi, PAK
| | | | - Zainab Rafi
- Cardiology, Sialkot Medical College, Sialkot, PAK
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11
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Marciszek M, Paterek A, Oknińska M, Mackiewicz U, Mączewski M. Ivabradine is as effective as metoprolol in the prevention of ventricular arrhythmias in acute non-reperfused myocardial infarction in the rat. Sci Rep 2020; 10:15027. [PMID: 32929098 PMCID: PMC7490414 DOI: 10.1038/s41598-020-71706-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 07/29/2020] [Indexed: 12/29/2022] Open
Abstract
Ventricular arrhythmias are a major source of early mortality in acute myocardial infarction (MI) and remain a major therapeutic challenge. Thus we investigated effects of ivabradine, a presumably specific bradycardic agent versus metoprolol, a β-blocker, at doses offering the same heart rate (HR) reduction, on ventricular arrhythmias in the acute non-reperfused MI in the rat. Immediately after MI induction a single dose of ivabradine/ metoprolol was given. ECG was continuously recorded and ventricular arrhythmias were analyzed. After 6 h epicardial monophasic action potentials (MAPs) were recorded and cardiomyocyte Ca2+ handling was assessed. Both ivabradine and metoprolol reduced HR by 17% and arrhythmic mortality (14% and 19%, respectively, versus 33% in MI, p < 0.05) and ventricular arrhythmias in post-MI rats. Both drugs reduced QTc prolongation and decreased sensitivity of ryanodine receptors in isolated cardiomyocytes, but otherwise had no effect on Ca2+ handling, velocity of conduction or repolarization. We did not find any effects of potential IKr inhibition by ivabradine in this setting. Thus Ivabradine is an equally effective antiarrhythmic agent as metoprolol in early MI in the rat. It could be potentially tested as an alternative antiarrhythmic agent in acute MI when β-blockers are contraindicated.
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Affiliation(s)
- Mariusz Marciszek
- Department of Clinical Physiology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Aleksandra Paterek
- Department of Clinical Physiology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Marta Oknińska
- Department of Clinical Physiology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Urszula Mackiewicz
- Department of Clinical Physiology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Michał Mączewski
- Department of Clinical Physiology, Centre of Postgraduate Medical Education, Warsaw, Poland.
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12
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Arteyeva NV, Azarov JE. ECG markers of local but not global increase in dispersion of ventricular repolarization (simulation study). J Electrocardiol 2020; 60:54-59. [PMID: 32268231 DOI: 10.1016/j.jelectrocard.2020.03.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/13/2020] [Accepted: 03/20/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND An increase in local dispersion of repolarization (DOR) may contribute more to arrhythmogenesis as compared to changes of global DOR. The aim of this simulation study was to find ECG markers of local increase in DOR in conditions where global DOR remains normal. METHODS In the framework of van Oosterom and Oostendorp ECGSIM model, the local DOR was increased in 10 different ventricular locations by (1) action potential duration (APD) shortening/lengthening both on epi- and endocardium, (2) epicardial APD shortening, and (3) endocardial APD shortening. The simulation cases where the increase in local DOR was accompanied by increase in global DOR were excluded from consideration. T-wave parameters were analyzed in the simulated precordial and anatomically ordered limb leads. RESULTS The increase in local DOR resulted in increased lead-to‑lead differences in Tpeak and Tend instants in 28 out of 32 simulated scenarios, and in an increased dispersion of Tpeak-Tend interval throughout 12 standard leads in 8 out of 32 simulated scenarios. In all simulations, the global DOR measured as a difference between earliest and latest repolarization times and standard APD deviation was the same. CONCLUSIONS The local increase in DOR was expressed in increased lead-to‑lead differences in Tpeak and Tend instants between adjacent anatomically ordered standard leads (aVL, I, aVR(-), II, aVF, III, and V1-V6), even if global DOR, Tpeak-Tend interval and Tpeak-Tend dispersion were within a normal range.
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Affiliation(s)
- Natalia V Arteyeva
- Department of Cardiac Physiology, Institute of Physiology, Komi Science Center, Ural Branch, Russian Academy of Sciences, 50, Pervomayskaya st., Syktyvkar 167982, Russia.
| | - Jan E Azarov
- Department of Cardiac Physiology, Institute of Physiology, Komi Science Center, Ural Branch, Russian Academy of Sciences, 50, Pervomayskaya st., Syktyvkar 167982, Russia; Department of Physiology, Medical Institute of Pitirim Sorokin, Syktyvkar State University, 11, Babushkin st., Syktyvkar 167000, Russia
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13
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Liu Y, Fu X, Gao H, Ren Y, Li H, He Y, Wang G. Effects of different concentrations of desflurane on the index of cardiac electrophysiological balance in gynecologic surgery patients. Can J Physiol Pharmacol 2019; 98:332-335. [PMID: 31770012 DOI: 10.1139/cjpp-2019-0290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objectives were to observe the effects of different concentrations of desflurane on QT, QTc, Tp-e, Tp-e/QT, and the index of cardiac electrophysiological balance (iCEB). Sixty patients were randomly divided into group D1, group D2, and group D3 by using a random number table, 20 in each group. After entering the operating room, patients received 10 mL/kg hydroxyethyl starch, 0.1 mg/kg midazolam, 0.1 mg/kg vecuronium, 3 μg/kg fentanyl, and 0.3 mg/kg etomidate intravenously and then accepted intubation and mechanical ventilation. The desflurane evaporator was opened. The concentrations of desflurane in the D1, D2, and D3 groups were maintained at 0.6, 1.3, and 2.0 minimum alveolar concentration (MAC), respectively. Twelve-lead ECGs were recorded at time before induction (T1) and at 20 min after desflurane reached the required concentration (T2). HR and MAP were recorded measure and the QT interval, QTc interval, Tp-e interval, Tp-e/QT ratio, and iCEB were calculated. Compared with before inhalation (T1), the QTc interval was prolonged in the D1, D2, and D3 groups after inhalation of different concentrations of desflurane for 20 min (T2) (P < 0.05) and the Tp-e/QT ratio decreased in the D1 and D2 groups at T2 (P < 0.05). Compared with the D1 and D2 groups, the Tp-e/QT ratio of the D3 group increased at T2 (P < 0.05). There was no significant difference in Tp-e interval and iCEB at any time (P > 0.05). The study suggested that inhalation of desflurane at a normal concentration cannot cause arrhythmogenic characteristics and affect the cardiac electrophysiological stability.
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Affiliation(s)
- Yanqiu Liu
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P.R. China
| | - Xiaokui Fu
- Department of Anesthesiology, Guizhou Medical University, Guiyang, Guizhou, P.R. China
| | - Hong Gao
- The Third Affiliated Hospital of Guizhou Medical University, Duyun, Guizhou, P.R. China
| | - Yimin Ren
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P.R. China
| | - Huayu Li
- Department of Anesthesiology, Guizhou Medical University, Guiyang, Guizhou, P.R. China
| | - Youqin He
- Department of Anesthesiology, Guizhou Medical University, Guiyang, Guizhou, P.R. China
| | - Guilong Wang
- Department of Anesthesiology, Guizhou Medical University, Guiyang, Guizhou, P.R. China
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14
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Ahmed TAN, Abdel‐Nazeer AA, Hassan AKM, Hasan‐Ali H, Youssef AA. Electrocardiographic measures of ventricular repolarization dispersion and arrhythmic outcomes among ST elevation myocardial infarction patients with pre-infarction angina undergoing primary percutaneous coronary intervention. Ann Noninvasive Electrocardiol 2019; 24:e12637. [PMID: 30737993 PMCID: PMC6931689 DOI: 10.1111/anec.12637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 12/06/2018] [Accepted: 12/28/2018] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Arrhythmias are considered one of the major causes of death in ST elevation myocardial infarction (STEMI), particularly in the early in-hospital phase. Pre-infarction angina (PIA) has been suggested to have a protective role. OBJECTIVES To study the difference in acute electrocardiographic findings between STEMI patients with and without PIA and to assess the in-hospital arrhythmias in both groups. MATERIAL AND METHODS We prospectively enrolled 238 consecutive patients with STEMI. Patients were divided into two groups: those with or without PIA. ECG data recorded and analyzed included ST-segment resolution (STR) at 90 min, corrected QT interval (QTc) and dispersion (QTD), T-peak-to-T-end interval (Tp-Te), and dispersion and Tp-Te/QT ratio. In-hospital ventricular arrhythmias encountered in both groups were recorded. Predictors of in-hospital arrhythmias were assessed among different clinical and electrocardiographic parameters. RESULTS Of the 238 patients included, 42 (17%) had PIA and 196 (83%) had no PIA. Patients with PIA had higher rates of STR (p < 0.0001), while patients with no PIA had higher values of QTc (p = 0.006), QTD (p = 0.001), Tp-Te interval (p = 0.001), Tp-Te dispersion (p < 0.0001), and Tp-Te/QT ratio (p = 0.01) compared to those with angina preceding their incident infarction (PIA). This was reflected into significantly higher rates of in-hospital arrhythmias among patients with no PIA (20% vs. 7%, p = 0.04). Furthermore, longer Tp-Te interval and higher Tp-Te/QT ratio independently predicted in-hospital ventricular arrhythmias. CONCLUSION Pre-infarction angina patients had better electrocardiographic measures of repolarization dispersion and encountered significantly less arrhythmic events compared to patients who did not experience PIA.
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Affiliation(s)
- Tarek A. N. Ahmed
- Department of Cardiovascular MedicineAsyut University HospitalAsyutEgypt
| | | | - Ayman K. M. Hassan
- Department of Cardiovascular MedicineAsyut University HospitalAsyutEgypt
| | - Hosam Hasan‐Ali
- Department of Cardiovascular MedicineAsyut University HospitalAsyutEgypt
| | - Amr A. Youssef
- Department of Cardiovascular MedicineAsyut University HospitalAsyutEgypt
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15
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Kim D, Lee GY, Choi JO, Kim K, Kim SJ, Jeon ES. Associations of Electrocardiographic Parameters with Left Ventricular Longitudinal Strain and Prognosis in Cardiac Light Chain Amyloidosis. Sci Rep 2019; 9:7746. [PMID: 31123293 PMCID: PMC6533364 DOI: 10.1038/s41598-019-44245-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 05/07/2019] [Indexed: 12/17/2022] Open
Abstract
A 12-lead ECG is a simple and less costly measure to assess cardiac amyloidosis and may reflect the infiltrative nature of cardiac amyloidosis and have prognostic value for predicting overall survival in patients with cardiac AL amyloidosis. Therefore, we investigated the associations of surface ECG parameters with left ventricular (LV) global longitudinal strain (GLS) and prognosis in patients with cardiac AL amyloidosis. We performed a multi-center, retrospective analysis of 102 biopsy-proven cardiac AL amyloidosis patients. Baseline studies included 12-lead surface ECG and echocardiography, with two-dimensional strain analysis performed within one month of diagnosis. From the Kaplan-Meier survival analysis, patients with prolonged QTc (≥483 msec) had significantly poorer survival. ECG scores were assigned according to presence of prolonged QTc (≥483 msec) and abnormal QRS axis, and the study participants were divided into three groups according to ECG score. Mean absolute value of LV GLS and regional LV longitudinal strain (LS) differed significantly among the three groups and decreased in a stepwise manner as ECG score increased. Log NT-proBNP increased in a stepwise manner as ECG score increased. Prolonged QTc (≥483 msec) and abnormal QRS axis showed significant incremental values in addition to the revised Mayo stage. The presence of prolonged QTc (≥483 msec) and abnormal QRS axis showed significant incremental values for overall mortality rates. In addition, ECG scores consisting of presence of prolonged QTc (≥483 msec), and abnormal QRS axis showed good association with longitudinal LV dysfunction and NT-proBNP. ECG finding may provide prognostic additional information regarding prognosis of AL amyloidosis with cardiac involvement.
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Affiliation(s)
- Darae Kim
- Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ga Yeon Lee
- Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jin-Oh Choi
- Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kihyun Kim
- Divsion of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Seok Jin Kim
- Divsion of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Eun-Seok Jeon
- Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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16
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Assessment of the relationship between reperfusion success and T-peak to T-end interval in patients with ST elevation myocardial infarction treated with percutaneous coronary intervention. Anatol J Cardiol 2019; 19:50-57. [PMID: 29339700 PMCID: PMC5864790 DOI: 10.14744/anatoljcardiol.2017.7949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Objective: T-peak–T-end (TPE) interval, which represents the dispersion of repolarization, is defined as the interval between the peak and end of the T-wave, and is associated with increased malignant ventricular arrhythmia and sudden cardiac death (SCD) in patients with ST elevation myocardial infarction (STEMI). Although prolonged TPE interval is associated with poor short- and long-term outcomes, even in patients with STEMI treated with successful primary percutaneous coronary intervention (pPCI), clinical, angiographic, and laboratory parameters that affect TPE remain to be elucidated. The aim of our study was to evaluate the potential relationship between prolonged TPE interval and reperfusion success using ST segment resolution (STR) in patients with STEMI undergoing pPCI. Methods: In the current study, 218 consecutive patients with STEMI who underwent pPCI were enrolled; after exclusion, 164 patients were included in the study population. Results: Patients were divided into two groups according to the presence of complete (STR%≥70) or incomplete (STR%<70) STR. Preprocedural corrected TPE (cTPEPRE;116±21 ms vs. 108±21 ms; p=0.027), postprocedural TPE (TPEPOST; 107±16 ms vs. 92±21 ms; p<0.001), and postprocedural cTPE (cTPEPOST; 119±19 ms vs. 102±17 ms; p<0.001) intervals were significantly longer in patients with incomplete STR than in patients with complete STR, whereas there was no statistically significant difference between the two groups in terms of pre- and postprocedural and corrected QT intervals. cTPEPRE and cTPEPOST were found to be independent predictors for incomplete STR. Conclusion: To our knowledge, this is the first study that evaluated the relationship between TPE interval and no-reflow defined by STR in patients with STEMI who were treated with pPCI.
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17
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Sharma LD, Sunkaria RK. Novel T-wave Detection Technique with Minimal Processing and RR-Interval Based Enhanced Efficiency. Cardiovasc Eng Technol 2019; 10:367-379. [DOI: 10.1007/s13239-019-00415-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 04/09/2019] [Indexed: 11/28/2022]
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18
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Prolonged Tpeak-Tend interval is associated with ventricular fibrillation during reperfusion in ST-elevation myocardial infarction. Int J Cardiol 2019; 280:80-83. [DOI: 10.1016/j.ijcard.2019.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 12/04/2018] [Accepted: 01/02/2019] [Indexed: 11/22/2022]
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19
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Azarov JE, Demidova MM, Koul S, van der Pals J, Erlinge D, Platonov PG. Progressive increase of the Tpeak-Tend interval is associated with ischaemia-induced ventricular fibrillation in a porcine myocardial infarction model. Europace 2019; 20:880-886. [PMID: 28541470 DOI: 10.1093/europace/eux104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 03/22/2017] [Indexed: 01/12/2023] Open
Abstract
Aims Repolarization indices of ECG have been widely assessed as predictors of ventricular arrhythmias. However, little is known of the dynamic changes of these parameters during continuous monitoring in acute ischaemic episodes. The objective of the study was to evaluate repolarization-related predictors of ventricular fibrillation (VF) during progression of experimental myocardial infarction. Methods and results Myocardial infarction was induced in 27 pigs by 40-min balloon inflation in the left anterior descending coronary artery, and 12-lead ECG was continuously recorded. Rate-corrected durations of the total Tpeak-Tend intervals measured from the earliest T-wave peak to the latest T-wave end in any lead were determined at baseline and at minute 1, 2, 5, and then every 5th minute of occlusion. There were 7 early (1-3 min) and 10 delayed (15-30 min) VFs in 16 pigs. Baseline Tpeak-Tend did not differ between animals with and without VF. Tpeak-Tend interval rapidly increased immediately after balloon inflation and was greater in VF-susceptible animals at 2-15 min compared with the animals that never developed VF (P < 0.05). Tpeak-Tend was tested as a predictor of delayed VFs. Median Tpeak-Tend at 10th min of occlusion was higher in delayed VF group (n = 10) than in animals without VF (n = 11): 138 [IQR 121-148] ms vs. 111 [IQR 106-127] ms, P = 0.02. Tpeak-Tend ≥123 ms (10th min) predicted delayed VF episodes with HR = 4.5 95% CI 1.1-17.8, P = 0.031. Conclusion Tpeak-Tend prolongation during ischaemia progression predicts VF in the experimental porcine myocardial infarction model and warrants further testing in clinical settings of acute coronary syndromes.
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Affiliation(s)
- Jan E Azarov
- Department of Cardiology, Clinical Sciences, Lund University, SE-221 85, Lund, Sweden.,Department of Cardiac Physiology, Institute of Physiology, Komi Science Center, Ural Branch, Russian Academy of Sciences, 50, Pervomayskaya st., 167982, Syktyvkar, Russia.,Department of Physiology, Medical Institute of Syktyvkar State University, 11, Babushkin st., 167000, Syktyvkar, Russia
| | - Marina M Demidova
- Department of Cardiology, Clinical Sciences, Lund University, SE-221 85, Lund, Sweden.,Federal Medical Research Center, 2, Akkuratov st., 197341, St. Petersburg, Russia
| | - Sasha Koul
- Department of Cardiology, Clinical Sciences, Lund University, SE-221?85, Lund, Sweden
| | - Jesper van der Pals
- Department of Cardiology, Clinical Sciences, Lund University, SE-221?85, Lund, Sweden
| | - David Erlinge
- Department of Cardiology, Clinical Sciences, Lund University, SE-221?85, Lund, Sweden
| | - Pyotr G Platonov
- Department of Cardiology, Clinical Sciences, Lund University, SE-221 85, Lund, Sweden.,Arrhythmia Clinic, Skåne University Hospital, SE-22185, Lund, Sweden
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20
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Huang J, Peng X, Fang Z, Hu X, Zhou S. Risk assessment model for predicting ventricular tachycardia or ventricular fibrillation in ST-segment elevation myocardial infarction patients who received primary percutaneous coronary intervention. Medicine (Baltimore) 2019; 98:e14174. [PMID: 30681585 PMCID: PMC6358344 DOI: 10.1097/md.0000000000014174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 12/14/2018] [Accepted: 12/28/2018] [Indexed: 12/02/2022] Open
Abstract
Ventricular tachycardia/ventricular fibrillation (VT/VF) is a kind of malignant arrhythmia in ST-segment elevation myocardial infarction (STEMI) patients who received primary percutaneous coronary intervention (PPCI). However, there are no risk assessment tools to anticipate the occurrence of VT/VF.This study is to build a risk assessment model to predict the possibility of VT/VF onset in STEMI patients undergoing PPCI.A retrospective study was conducted to analyze the patients who underwent PPCI from January 2006 to May 2015. Subjects were divided into VT/VF group and no VT/VF group based on whether VT/VF had occurred or not. In addition, the VT/VF group was further separated into early-onset group (from the time that symptoms began to before the end of PPCI) and late-onset group (after the end of PPCI) based on the timing of when VT/VF happened. Multivariate regression analysis was carried out to distinguish the independent risk factors of VT/VF and an additional statistical method was executed to build the risk assessment model.A total of 607 patients were enrolled in this study. Of these patients, 67 cases (11%) experienced VT/VF. In addition, 91% (61) of patients experienced VT/VF within 48 h from the time that the symptoms emerged. Independent risk factors include: age, diabetes mellitus, heart rate, ST-segment maximum elevation, ST-segment total elevation, serum potassium, left ventricular ejection fraction (LVEF), culprit artery was right coronary artery, left main (LM) stenosis, Killip class > I class, and pre-procedure thrombolysis in myocardial infarction (TIMI) flow zero grade. Risk score model and risk rank model have been established to evaluate the possibility of VT/VF. Class I: ≤ 4 points; Class II: > 4 points, ≤ 5.5 points; Class III: > 5.5 points, < 6.5 points; and Class IV ≥ 6.5 points. The higher the class, the higher the risk.The incidence of VT/VF in STEMI patients undergoing PPCI is 11% and it occurs more frequently from the time that symptoms begin to before the end of PPCI, which, in most cases, occurs within 48 h of the event. Our risk assessment model could predict the possible occurrence of VT/VF.
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21
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Tse G, Bazoukis G, Roever L, Liu T, Wu WKK, Wong MCS, Baranchuk A, Korantzopoulos P, Asvestas D, Letsas KP. T-Wave Indices and Atherosclerosis. Curr Atheroscler Rep 2018; 20:55. [PMID: 30225618 DOI: 10.1007/s11883-018-0756-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Tpeak-Tend interval, the time difference between the peak and the end of the T-wave, reflects the degree of dispersion of repolarization. Its prolongation has been associated with higher risks of developing ventricular arrhythmias and sudden cardiac death in different pro-arrhythmic conditions such as Brugada and long QT syndromes. In this review, we will provide a comprehensive overview on how Tpeak-Tend is altered in different atherosclerotic conditions such as hypertension, stable coronary artery disease, acute coronary obstruction, and coronary slow flow as well as inflammatory diseases affecting the arterial tree. We will explore its relationship with arterial function and dysfunction, ventricular remodeling, and arrhythmic and mortality outcomes. The published literature shows that patients with coronary atherosclerosis, whether in the form of stable coronary artery disease, chronic total occlusion, slow flow, or acute coronary obstruction, have prolonged Tpeak-Tend intervals and Tpeak-Tend/QT ratios. These can be used to predict the occurrence of ventricular arrhythmias and sudden cardiac death. They also correlate with the extent and severity of arterial stenosis and structural remodeling of the ventricles as well as arterial function and dysfunction. Finally, they can be normalized following revascularization and may therefore be used as a surrogate measure of treatment success.
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Affiliation(s)
- Gary Tse
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, SAR, People's Republic of China. .,Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, SAR, People's Republic of China.
| | - George Bazoukis
- Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece
| | - Leonardo Roever
- Department of Clinical Research, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, 300211, People's Republic of China
| | - William K K Wu
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, SAR, People's Republic of China.,Department of Anaesthesia and Intensive Care, State Key Laboratory of Digestive Disease, LKS Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Martin C S Wong
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Adrian Baranchuk
- Division of Cardiology, Kingston General Hospital, Queen's University, Kingston, ON, Canada
| | | | - Dimitrios Asvestas
- Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece
| | - Konstantinos P Letsas
- Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece. .,Second Department of Cardiology, Laboratory of Cardiac Electrophysiology, Evangelismos General Hospital of Athens, 10676, Athens, Greece.
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22
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Malik M, Huikuri H, Lombardi F, Schmidt G, Zabel M. Conundrum of the Tpeak-Tend interval. J Cardiovasc Electrophysiol 2018; 29:767-770. [DOI: 10.1111/jce.13474] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 02/26/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Marek Malik
- National Heart and Lung Institute; Imperial College; London England
| | - Heikki Huikuri
- Research Unit of Internal Medicine; University of Oulu and University Hospital; Oulu Finland
| | | | - Georg Schmidt
- Klinik für Innere Medizin I; Technical University of Munich; Munich Germany
- DZHK; Partner site Munich Heart Alliance; Germany
| | - Markus Zabel
- Department of Cardiology and Pneumology - Heart Center; University of Göttingen Medical Center; Göttingen Germany
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23
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Yu Z, Chen Z, Wu Y, Chen R, Li M, Chen X, Qin S, Liang Y, Su Y, Ge J. Electrocardiographic parameters effectively predict ventricular tachycardia/fibrillation in acute phase and abnormal cardiac function in chronic phase of ST-segment elevation myocardial infarction. J Cardiovasc Electrophysiol 2018; 29:756-766. [PMID: 29399929 DOI: 10.1111/jce.13453] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/10/2018] [Accepted: 01/29/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Ziqing Yu
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
- Shanghai Medical College; Fudan University; Shanghai PR China
| | - Zhangwei Chen
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Yuan Wu
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Ruizhen Chen
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
- Department of Cardiovascular Diseases, Key Laboratory of Viral Heart Diseases, Ministry of Public Health, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Minghui Li
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
- Department of Cardiovascular Diseases, Key Laboratory of Viral Heart Diseases, Ministry of Public Health, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Xueying Chen
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Shengmei Qin
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Yixiu Liang
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Yangang Su
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
| | - Junbo Ge
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital; Fudan University; Shanghai PR China
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24
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El-Sherif N, Boutjdir M, Turitto G. Sudden Cardiac Death in Ischemic Heart Disease: Pathophysiology and Risk Stratification. Card Electrophysiol Clin 2017; 9:681-691. [PMID: 29173410 DOI: 10.1016/j.ccep.2017.08.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Sudden cardiac death (SCD) accounts for approximately 360,000 deaths annually in the United States. Ischemic heart disease is the major cause of death in the general adult population. SCD can be due to arrhythmic or nonarrhythmic cardiac causes. Arrhythmic SCD may be caused by ventricular tachyarrhythmia or pulseless electrical activity/asystole. This article reviews the most recent pathophysiology and risk stratification strategies for SCD, emphasizing electrophysiologic surrogates of conduction disorder, dispersion of repolarization, and autonomic imbalance. Factors that modify arrhythmic death are addressed.
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Affiliation(s)
- Nabil El-Sherif
- State University of New York, Downstate Medical Center, Brooklyn, NY, USA; New York Harbor VA Healthcare System, 800 Poly Place, Brooklyn, NY 11209, USA.
| | - Mohamed Boutjdir
- New York Harbor VA Healthcare System, 800 Poly Place, Brooklyn, NY 11209, USA
| | - Gioia Turitto
- New York Presbyterian - Brooklyn Methodist Hospital, Brooklyn, NY, USA
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Yoon N, Hong S, Glass A, Kim SS, Kim MC, Cho JY, Lee KH, Sim DS, Yoon HJ, Kim KH, Hong YJ, Park HW, Kim JH, Ahn Y, Jeong M, Park JC, Cho JG. T
peak–Tend interval during therapeutic hypothermia can predict upcoming ventricular fibrillation in subjects with aborted arrhythmic sudden cardiac death: 3-years follow-up results. Europace 2017; 19:iv17-iv24. [DOI: 10.1093/europace/eux281] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 09/12/2017] [Indexed: 11/14/2022] Open
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Banavalikar B, Thajudeen A, Namboodiri N, Nair KKM, Pushpangadhan AS, Valaparambil AK. Long-term effects of cardiac resynchronization therapy on electrical remodeling in heart failure-A prospective study. Pacing Clin Electrophysiol 2017; 40:1279-1285. [PMID: 28901586 DOI: 10.1111/pace.13193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/08/2017] [Accepted: 08/28/2017] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Effects of cardiac resynchronization therapy (CRT) on arrhythmogenicity and sudden death have not been fully ascertained. CRT has been shown to increase transmural dispersion of repolarization (TDR) immediately on implantation, which may favorably remodel on long-term follow-up. However, such a hypothesis has not been prospectively evaluated. METHODS AND RESULTS We included 35 consecutive patients who underwent CRT implantation between September 2013 and August 2014 (mean age 56.8 ± 11.09 years; 71.43% males). QT and Tpeak-Tend (Tp-e) intervals were measured during endocardial (RVendoP), epicardial (LVepiP), and biventricular pacing (BiVP) at CRT implantation and 1-year follow-up. Compared to RVendoP (130.41 ± 16.75 ms), Tp-e was significantly prolonged during BiVP (142.06 ± 21.98 ms; P < 0.001) and LVepiP (183.45 ± 27.87 ms; P < 0.001) at baseline. There was a significant decrease in Tp-e during BiVP on follow-up (117.93 ± 15.03 ms; P < 0.001). High responders had significantly lower Tp-e at 1 year compared to low responders (113.16 ± 14.3 ms vs 129.59 ± 9.75 ms, P = 0.004). Tp-e at 1 year had strong negative correlation with reduction in LV end-systolic volumes (r = - 0.51; P = 0.003). Seven patients with sustained ventricular arrhythmias during follow-up had significantly longer baseline Tp-e compared to those without arrhythmias (158.19 ± 17.59 ms vs 139.72 ± 20.94 ms, P = 0.043). A baseline Tp-e value of ≥ 148 ms had a specificity of 75% and sensitivity of 71% to predict ventricular arrhythmias. CONCLUSIONS Baseline TDR is greater during BiVP and LV epiP compared with RVendoP in patients with heart failure. However, BiVP causes a significant reduction in TDR reflective of reverse electrical remodeling on long-term follow-up.
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Affiliation(s)
- Bharatraj Banavalikar
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - Anees Thajudeen
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - Narayanan Namboodiri
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - Krishna Kumar Mohanan Nair
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - Abhilash Srivilasam Pushpangadhan
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
| | - Ajit Kumar Valaparambil
- Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, 695011, India
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The T peak − T end interval as an electrocardiographic risk marker of arrhythmic and mortality outcomes: A systematic review and meta-analysis. Heart Rhythm 2017; 14:1131-1137. [PMID: 28552749 DOI: 10.1016/j.hrthm.2017.05.031] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Indexed: 11/21/2022]
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Fisser C, Marcinek A, Hetzenecker A, Debl K, Luchner A, Sterz U, Priefert J, Zeman F, Kohler M, Maier LS, Buchner S, Arzt M. Association of sleep-disordered breathing and disturbed cardiac repolarization in patients with ST-segment elevation myocardial infarction. Sleep Med 2017; 33:61-67. [DOI: 10.1016/j.sleep.2017.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/30/2016] [Accepted: 01/04/2017] [Indexed: 11/28/2022]
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Narayanan K, Chugh SS. The 12-lead electrocardiogram and risk of sudden death: current utility and future prospects. Europace 2016; 17 Suppl 2:ii7-13. [PMID: 26842119 DOI: 10.1093/europace/euv121] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
More than 100 years after it was first invented, the 12-lead electrocardiogram (ECG) continues to occupy an important place in the diagnostic armamentarium of the practicing clinician. With the recognition of relatively rare but important clinical entities such as Wolff-Parkinson-White and the long QT syndrome, this clinical tool was firmly established as a test for assessing risk of sudden cardiac death (SCD). However, over the past two decades the role of the ECG in risk prediction for common forms of SCD, for example in patients with coronary artery disease, has been the focus of considerable investigation. Especially in light of the limitations of current risk stratification approaches, there is a renewed focus on this broadly available and relatively inexpensive test. Various abnormalities of depolarization and repolarization on the ECG have been linked to SCD risk; however, more focused work is needed before they can be deployed in the clinical arena. The present review summarizes the current knowledge on various ECG risk markers for prediction of SCD and discusses some future directions in this field.
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Affiliation(s)
- Kumar Narayanan
- The Heart Institute, Advanced Health Sciences Pavilion Suite A3100, Cedars-Sinai Medical Center, 127 S. San Vicente Blvd, Los Angeles, CA 90048, USA
| | - Sumeet S Chugh
- The Heart Institute, Advanced Health Sciences Pavilion Suite A3100, Cedars-Sinai Medical Center, 127 S. San Vicente Blvd, Los Angeles, CA 90048, USA
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Abstract
In this review article, we will explore some of the contemporary methods for predicting sudden cardiac death (SCD). These include experimental methods yet to be adopted in the clinical setting, and methods that have been extrapolated from observational data in those with a history of SCD. We will discuss how these relate to the different aetiologies and disease processes. We will also explore how these may be used in the clinical setting to decide on management.
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Affiliation(s)
- Elijah Behr
- Cardiovascular Research Unit, St George’s University of London, London, UK
| | - Bode Ensam
- Cardiovascular Research Unit, St George’s University of London, London, UK
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Affiliation(s)
- Stuart B Prenner
- Division of Cardiology, Bluhm Cardiovascular Institute, Northwestern Memorial Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Sanjiv J Shah
- Division of Cardiology, Bluhm Cardiovascular Institute, Northwestern Memorial Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | - Andrew J Sauer
- Division of Cardiology, University of Kansas School of Medicine, Kansas City, KS
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