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Stevens TL, Manring HR, Wallace MJ, Argall A, Dew T, Papaioannou P, Antwi-Boasiako S, Xu X, Campbell SG, Akar FG, Borzok MA, Hund TJ, Mohler PJ, Koenig SN, El Refaey M. Humanized Dsp ACM Mouse Model Displays Stress-Induced Cardiac Electrical and Structural Phenotypes. Cells 2022; 11:3049. [PMID: 36231013 PMCID: PMC9562631 DOI: 10.3390/cells11193049] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/17/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
Arrhythmogenic cardiomyopathy (ACM) is an inherited disorder characterized by fibro-fatty infiltration with an increased propensity for ventricular arrhythmias and sudden death. Genetic variants in desmosomal genes are associated with ACM. Incomplete penetrance is a common feature in ACM families, complicating the understanding of how external stressors contribute towards disease development. To analyze the dual role of genetics and external stressors on ACM progression, we developed one of the first mouse models of ACM that recapitulates a human variant by introducing the murine equivalent of the human R451G variant into endogenous desmoplakin (DspR451G/+). Mice homozygous for this variant displayed embryonic lethality. While DspR451G/+ mice were viable with reduced expression of DSP, no presentable arrhythmogenic or structural phenotypes were identified at baseline. However, increased afterload resulted in reduced cardiac performance, increased chamber dilation, and accelerated progression to heart failure. In addition, following catecholaminergic challenge, DspR451G/+ mice displayed frequent and prolonged arrhythmic events. Finally, aberrant localization of connexin-43 was noted in the DspR451G/+ mice at baseline, becoming more apparent following cardiac stress via pressure overload. In summary, cardiovascular stress is a key trigger for unmasking both electrical and structural phenotypes in one of the first humanized ACM mouse models.
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Affiliation(s)
- Tyler L. Stevens
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Physiology and Cellular Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Heather R. Manring
- Comprehensive Cancer Center, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Michael J. Wallace
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Physiology and Cellular Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Aaron Argall
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Physiology and Cellular Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Trevor Dew
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Physiology and Cellular Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Peter Papaioannou
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Steve Antwi-Boasiako
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Xianyao Xu
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Stuart G. Campbell
- Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
- Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Fadi G. Akar
- Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
- Department of Internal Medicine, Section of Cardiovascular Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - Maegen A. Borzok
- Biochemistry, Chemistry, Engineering, and Physics Department, Commonwealth University of Pennsylvania, Mansfield, PA 16933, USA
| | - Thomas J. Hund
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
- Department of Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Peter J. Mohler
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Physiology and Cellular Biology, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
- Department of Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Sara N. Koenig
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Internal Medicine, Division of Cardiovascular Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
| | - Mona El Refaey
- Frick Center for Heart Failure and Arrhythmia Research, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Department of Surgery, Division of Cardiac Surgery, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, OH 43210, USA
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Shinohara T, Yonezu K, Hirota K, Kondo H, Fukui A, Akioka H, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Fragmented QRS as a risk marker for the occurrence of ventricular fibrillation in patients with variant angina. Ann Noninvasive Electrocardiol 2022; 27:e12937. [PMID: 35170178 PMCID: PMC9107091 DOI: 10.1111/anec.12937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 01/26/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Variant angina (VA) is caused by reversible coronary artery spasm, which is characterized by chest pain with ST-segment elevations on standard 12-lead electrocardiogram (ECG) at rest. Ventricular fibrillation (VF) is often caused by VA attack, but the risk stratification is not well understood. The purpose of this study was to evaluate the impact of fragmented QRS (fQRS) on VF occurrence in VA patients. METHODS Ninety-four patients who showed ST elevation on 12-lead ECGs with total or nearly total occlusion in response to coronary spasm provocation test were enrolled. Among them, 16 patients had documented VF before hospital admission (n = 12) or experienced VF during provocation test (n = 4) (VF occurrence group). The fQRS was defined as the presence of spikes within the QRS complex of two or more consecutive leads. RESULTS The prevalence of fQRS was more often observed in the VF occurrence group than in the non-VF occurrence group (63% [10/16] vs. 27% [21/78], p = 0.009). Univariate analyses revealed that age, history of syncope, QTc, and the presence of fQRS were associated with VF occurrence (p = 0.004, 0.005, 0.029, and 0.008, respectively). Furthermore, upon multivariate analyses using those risk factors, age, QTc, and fQRS predicted VF occurrence independently (p = 0.007, 0.041, and 0.014, respectively). CONCLUSIONS The present study demonstrated that fQRS in VA patients is a risk factor for VF. The fQRS may be a useful factor for the risk stratification of VF occurrence in VA patients.
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Affiliation(s)
- Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Keisuke Yonezu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kei Hirota
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
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Osaka Y, Ono Y, Goto K, Yabe K, Tanaka A, Miyazaki T, Suzuki A, Kurihara K, Goya M, Otomo K, Sasano T. Fragmented QRS on far-field intracardiac electrograms as a predictor of arrhythmic events. J Arrhythm 2021; 37:1156-1161. [PMID: 34621414 PMCID: PMC8485800 DOI: 10.1002/joa3.12622] [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: 06/11/2021] [Revised: 07/27/2021] [Accepted: 08/13/2021] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Studies suggest that fragmented QRS (fQRS) can predict arrhythmic events in various cardiac diseases. However, the association between fQRS recordings on intracardiac electrogram (EGM) and ventricular arrhythmic events remains unknown. METHODS We enrolled 51 patients (age, 62 ± 12 years; 40 men) with an implantable cardioverter-defibrillator (ICD) and structural heart disease and evaluated surface electrocardiogram (ECG) and EGM measurement of fQRS and the association between fQRS and arrhythmic events. RESULTS fQRS was detected on surface ECG and ICD-EGM in 12 (23.5%) and 15 (29.4%) patients, respectively. fQRS was detected more frequently on ICD-EGM in patients with fQRS on surface ECG than in patients without fQRS (7/12 [58.3%] vs 8/39 patients [20.5%], P = .01). Appropriate ICD therapies were documented in 16 patients. Among these patients, fQRS was detected more frequently on surface ECG and ICD-EGM in patients with appropriate ICD therapies (8/16, 50.0%; P = .001 and 11/16, 68.9%; P < .001). Nonsustained ventricular tachycardia was significantly more frequent in patients with appropriate ICD therapies (15/16, 93.8%; P = .04). Multiple logistic regression analysis showed that fQRS on ICD-EGM was a predictor of arrhythmic events (P = .03). Kaplan-Meier survival analysis revealed that ICD therapies were significantly more frequent among patients with fQRS on both surface ECG and ICD-EGM than among those without fQRS (66.7% vs 6.6%, P < .001). CONCLUSION The presence of fQRS on ICD-EGM can be a predictor of arrhythmic events in ICD patients. Surface ECG and ICD-EGM measurement may help predict ventricular arrhythmic events.
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Affiliation(s)
- Yuki Osaka
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Yuichi Ono
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Kentaro Goto
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Kento Yabe
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Akifumi Tanaka
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Toru Miyazaki
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Asami Suzuki
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Ken Kurihara
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Masahiko Goya
- Department of Cardiovascular Medicine Tokyo Medical and Dental University Tokyo Japan
| | - Kenichiro Otomo
- Department of Cardiology Ome Municipal General Hospital Tokyo Japan
| | - Tetsuo Sasano
- Department of Cardiovascular Medicine Tokyo Medical and Dental University Tokyo Japan
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Yang T, Fu X, Fu P, Chen J, Xu C, Liu X, Niu T. The value of fragmented QRS in predicting the prognosis of chronic total occlusion patients with myocardial infarction history undergoing percutaneous coronary intervention: A 24-months follow-up study. Clin Cardiol 2021; 44:537-546. [PMID: 33590897 PMCID: PMC8027581 DOI: 10.1002/clc.23573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/24/2021] [Accepted: 02/08/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Fragmented QRS (fQRS) is a marker of local myocardial scar. This study aimed to analyze the relationship between fQRS and coronary collateral circulation (CCC) and evaluate the predictive value of fQRS for long-term clinical outcomes among patients with chronic total occlusion (CTO) and prior myocardial infarction (MI) who underwent percutaneous coronary intervention (PCI). METHODS A total of 862 patients with a definite history of MI who had one CTO coronary artery and underwent PCI between 2013 and 2018 were continuously analyzed. Patients were divided into group A (no Q wave and fQRS, n = 206), group B (fQRS, n = 265), group C (Q wave, n = 391). All patients were followed up for 2 years. RESULTS The incidence rate of major adverse cardiovascular events (MACE) in group B was significantly lower than in group C (group B vs. C: 7.2% vs. 11.3%, P = 0.043). The percentage of good CCC was 94.2%, 88.3%, and 82.9% in group A, B, and C (p < .001), respectively. The improvement of cardiac function in group B and A were more significant than in group C. Multivariate Cox regression analysis showed fQRS was an independent protective factor of MACE after PCI within 2 years in CTO patients with prior MI (RR = 0.668, 95% CI [0.422-0.917], p = .001). CONCLUSION fQRS is an independent protective factor of prognosis in patients with prior MI and one CTO vessel who underwent PCI, presenting with a higher rate of good CCC, less occurrence of MACE, and better heart function than in Q wave patients.
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Affiliation(s)
- Tiangui Yang
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Xi Fu
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Peng Fu
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Jie Chen
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Changlu Xu
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Xiaoxia Liu
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
| | - Tiesheng Niu
- Department of CardiologyShengjing Hospital of China Medical UniversityShenyangLiaoningChina
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5
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Eren H, Kaya Ü, Öcal L, Öcal AG, Genç Ö, Genç S, Evlice M. Presence of fragmented QRS may be associated with complex ventricular arrhythmias in patients with type-2 diabetes mellitus. Acta Cardiol 2021; 76:67-75. [PMID: 31775006 DOI: 10.1080/00015385.2019.1693117] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Ventricular arrhythmias (VAs) are frequent in diabetes mellitus (DM) patients. Myocardial fibrosis is one of the components of diabetic cardiomyopathy secondary to DM. Fragmented QRS (fQRS) on electrocardiography (ECG) has been shown to be a marker of myocardial fibrosis. In this study, we aimed to investigate the association between fQRS and complex VAs in patients with DM. METHODS Three hundred and thirty-six consecutive patients who were diagnosed with DM were included in the study. The control group consisted of 275 age- and sex-matched healthy individuals. ECG and transthoracic echocardiography were performed in all the patients. fQRS was defined as additional R' wave or notching/splitting of S wave in two contiguous ECG leads. All the patients underwent 24-h Holter monitoring and VAs were classified using Lown's scoring system. Lown class ≥ 3 VAs were considered as complex VAs. RESULTS As compared to the healthy individuals, prevalence of fQRS (37.5% vs. 6.9%, p < .001) and complex VAs (14% vs. 0%, p < .001) were significantly higher in patients with DM. Furthermore, complex VAs (28.4% vs. 6.4%, p < .001) were significantly higher in DM patients with fQRS. In multiple logistic regression analysis, DM duration (OR: 1.510, 95% CI:1.343 to 1.698; p < .001) and presence of fQRS (OR: 3.262, 95% CI: 1.443 to 7.376; p = .004) were independent predictors for complex VAs. CONCLUSIONS The presence of fQRS may be associated with complex VAs in patients with DM. Therefore, fQRS may be used as a predictor of complex VAs and the risk of sudden death in patients with DM.
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Affiliation(s)
- Hayati Eren
- Department of Cardiology, Elbistan State Hospital, Kahramanmaraş, Turkey
| | - Ülker Kaya
- Department of Cardiology, Elbistan State Hospital, Kahramanmaraş, Turkey
| | - Lütfi Öcal
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Istanbul, Turkey
| | - Aslı Gözek Öcal
- Department of Internal Medicine, Kartal Dr Lütfi Kırdar Training and Research Hospital, Istanbul, Turkey
| | - Ömer Genç
- Department of Internal Medicine, Kahramanmaraş Necip Fazıl City Hospital, Kahramanmaraş, Turkey
| | - Selin Genç
- Department of Internal Medicine, Türkoğlu Kemal Beyazıt State Hospital, Kahramanmaraş, Turkey
| | - Mert Evlice
- Department of Cardiology, Universtiy of Health Sciences Adana Health Practices and Research Center, Adana, Turkey
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Karadeniz C. Importance of electrocardiographic markers in predicting cardiac events in children. Biomark Med 2020; 14:1679-1689. [PMID: 33336595 DOI: 10.2217/bmm-2020-0391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ECG is a common diagnostic tool in medical practice. Sudden cardiac death (SCD) is a rare but devastating event. The most common cause of SCD in the young is a primary arrhythmic event, which is often produced by malignant ventricular arrhythmia. Several electrocardiographic markers for ventricular repolarization and depolarization have been proposed to predict this arrhythmic risk and SCD in children. Although many of these parameters can easily be used in clinical practice, some of them need specific techniques for interpretation. In this review, we summarized the current knowledge regarding the clinical importance and the ability of these ECG parameters to predict adverse cardiac events in the pediatric population.
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Affiliation(s)
- Cem Karadeniz
- Department of Pediatric Cardiology, Pediatric Arrhythmia & Electrophysiology, School of Medicine, Kâtip Celebi University, Izmir, Turkey
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7
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Kamal D, Hashem M. Role of QRS fragmentation in 12-lead surface ECG in prediction of isolated epicardial coronary artery ectasia and its anatomical distribution in patients without acute coronary syndromes. Egypt Heart J 2020; 72:20. [PMID: 32297072 PMCID: PMC7158958 DOI: 10.1186/s43044-020-00054-4] [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] [Received: 01/17/2020] [Accepted: 03/25/2020] [Indexed: 12/22/2022] Open
Abstract
Background Coronary artery ectasia (CAE) is a form of abnormal coronary artery lumen dilatation associated with epicardial flow disturbances and microvascular dysfunction. QRS complex fragmentation (fQRS) in surface ECG is caused by abnormal depolarization due to myocardial ischemia and scarring. It has been proved in different studies to be positively correlated with adverse cardiac events. This study aimed to assess the role of fQRS as a non-invasive predictor of CAE and its anatomical distribution. A total of 100 patients referred for elective coronary angiography were included and divided into 2 groups: 50 patients with isolated CAE (group A) and 50 patients with angiographically normal coronaries (group B, control group). Both groups were compared regarding clinical, echocardiographic, and ECG characteristics. Results Univariate analysis showed a significant correlation between male sex, smoking, diabetes mellitus, increased systolic blood pressure, fQRS, echocardiographic evidence of diastolic dysfunction, and CAE (P values of 0.005, 0.002, 0.016, 0.027, 0.0001, and 0.04, respectively). Multivariate regression analysis showed that fQRS is the most important independent predictor for the presence of CAE (P < 0.00001) with sensitivity 94%, specificity 88%, PPV 88.7%, and NPV 93.6%. We also found a significant correlation between fQRS distribution in surface ECG and anatomical distribution of CAE [increased territories with multivessel affection (P = 0.00001), anterior leads with LAD affection (P = 0.00001), lateral and inferior leads with LCX affection (P = 0.003 and 0.04, respectively), inferior leads with RCA affection (P = 0.00001)]. Conclusion fQRS in surface ECG can potentially be used as an effective non-invasive method to predict isolated CAE and its anatomical distribution.
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Affiliation(s)
- Diaa Kamal
- Cardiology Department, Faculty of Medicine, Ain Shams University, Abbasia Street, Cairo, Egypt.
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Tekin Tak B, Cay S, Ekizler FA, Ozcan Cetin EH, Pamukcu HE, Kafes H, Ulvan N, Ozeke O, Ozcan F, Topaloglu S, Aras D. Fragmented QRS as a candidate marker for left ventricular nonrecovery in patients with peripartum cardiomyopathy. Ann Noninvasive Electrocardiol 2019; 25:e12708. [PMID: 31587432 PMCID: PMC7358786 DOI: 10.1111/anec.12708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 09/14/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Fragmented QRS (fQRS) complex, with various morphology, has been recently described as a diagnostic criterion of several cardiac diseases. However, there are little data regarding the prognostic role of fQRS in peripartum cardiomyopathy (PPCM) patients. We aimed to investigate the effect of fQRS on predicting left ventricular (LV) nonrecovery in patients with peripartum cardiomyopathy (PPCM). METHODS Ninety patients (mean age: 34.7 ± 6.5 years) with the diagnosis of PPCM were analyzed retrospectively. The median follow-up period of was 67.0 (12.0-192.0) months. Fragmented QRS was defined as the presence of various RSR' patterns (QRS duration < 120 ms) with or without Q wave, which include an additional R wave (R' prime) or notching of the R wave or S wave, or the presence of more than one R' (fragmentation) without typical bundle branch block. Recovery of LV function was defined as the presence of LV ejection fraction (EF) >45%. RESULTS Of the patients, 54 (60%) did not recover LV function at the last follow-up visit (nonrecovery group), while 36 of the patients (40%) exhibited LV recovery (recovery group). LV ejection fraction (EF) and fQRS were identified as independent predictors of LV nonrecovery in patients with PPCM (odds ratio OR: 5.546, 95% confidence interval CI: 0.792-0.979, p = .019 and OR: 5.986, 95% CI: 1.313-11.787, p = .014, respectively). CONCLUSION Our data firstly indicated that presence of fQRS was a significant predictor of LV nonrecovery in patients with PPCM. The fQRS might assist in identifying high-risk patients.
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Affiliation(s)
- Bahar Tekin Tak
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Serkan Cay
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Firdevs Aysenur Ekizler
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Elif Hande Ozcan Cetin
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Hilal Erken Pamukcu
- Department of Cardiology, Dışkapı Education and Research Hospital, Health Sciences University Ankara, Turkey
| | - Habibe Kafes
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Nedret Ulvan
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Ozcan Ozeke
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Firat Ozcan
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Serkan Topaloglu
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
| | - Dursun Aras
- Department of Cardiology, University of Health Sciences, Ankara City Hospital, Ankara, Turkey
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9
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Aquino NJ, Centurión OA, Torales JM, Miño LM, Scavenius KE, Alderete JF, Candia JC, García LB, Cáceres C, Martínez JE, Lovera OA. Association of QRS Complex Fragmentation with QT Interval Prolongation in Patients with Ischemic Heart Disease. CURRENT HEALTH SCIENCES JOURNAL 2019; 45:398-404. [PMID: 32110442 PMCID: PMC7014980 DOI: 10.12865/chsj.45.04.08] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/26/2019] [Indexed: 01/14/2023]
Abstract
BACKGROUND The fragmented QRS complex (FQRS) was found to be associated to malignant ventricular arrhythmias and sudden death in patients with hypertrophic cardiomyopathy and other entities. There is scant data available correlating the presence of FQRS with QT interval prolongation in patients with ischemic heart disease (IHD). METHODS A descriptive, retrospective, cross-sectional study was performed in 123 patients with IHD to analyze and correlate the presence of FQRS with QT interval prolongation in the conventional 12-leads electrocardiogram in patients with documented chronic IHD. RESULTS There were 62% male patients. The mean age was 63.8±12.6 years. Thirty six (44%) patients had fragmented QRS (64% men and 36% women). The duration of QT and QTc, the mean values were 413±59ms, and 463±67ms, respectively. Of the 36 patients with FQRS, 23 patients have prolongation of the QTc interval, and 13 patients did not present it. Of the 45 patients without FQRS, 21 of them have prolongation of the QTc interval, and 24 patients did not have it. These data resulted in a sensitivity of 52% with a moderate SnNout, a specificity of 65% with moderate SpPin, a positive predictive accuracy of 64%, a negative predictive accuracy of 53%. These data resulted in a prevalence of 54%. CONCLUSION the presence of FQRS in the ECG has a moderate sensitivity and specificity, as well as, moderate negative and positive predictive value of the existence of QT interval prolongation in patients with ischemic heart disease.
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Affiliation(s)
- N J Aquino
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
| | - O A Centurión
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - J M Torales
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - L M Miño
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - K E Scavenius
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - J F Alderete
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - J C Candia
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
| | - L B García
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
- Departament of Health Sciences Investigation, Sanatorio Metropolitano, Fernando de la Mora, Paraguay
| | - C Cáceres
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
| | - J E Martínez
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
| | - O A Lovera
- Cardiology Department, Clinic Hospital, Faculty of Medical Sciences, Asunción National University (UNA), San Lorenzo, Paraguay
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10
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Meta-analysis of T peak-T end and T peak-T end/QT ratio for risk stratification in congenital long QT syndrome. J Electrocardiol 2018; 51:396-401. [PMID: 29550106 DOI: 10.1016/j.jelectrocard.2018.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/13/2018] [Accepted: 03/06/2018] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND OBJECTIVES Congenital long QT syndrome (LQTS) predisposes affected individuals to ventricular tachycardia/fibrillation (VF/VF), potentially resulting in sudden cardiac death. The Tpeak-Tend interval and the Tpeak-Tend/QT ratio, electrocardiographic markers of dispersion of ventricular repolarization, were proposed for risk stratification but their predictive values in LQTS have been controversial. A systematic review and meta-analysis was conducted to examine the value of Tpeak-Tend intervals and Tpeak-Tend/QT ratios in predicting arrhythmic and mortality outcomes in congenital LQTS. METHOD PubMed and Embase databases were searched until 9th May 2017, identifying 199 studies. RESULTS Five studies on long QT syndrome were included in the final meta-analysis. Tpeak-Tend intervals were longer (mean difference [MD]: 13ms, standard error [SE]: 4ms, P=0.002; I2=34%) in congenital LQTS patients with adverse events [syncope, ventricular arrhythmias or sudden cardiac death] compared to LQTS patients without such events. By contrast, Tpeak-Tend/QT ratios were not significantly different between the two groups (MD: 0.02, SE: 0.02, P=0.26; I2=0%). CONCLUSION This meta-analysis showed that Tpeak-Tend interval is significant higher in individuals who are at elevated risk of adverse events in congenital LQTS, offering incremental value for risk stratification.
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11
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Pérez-Riera AR, Barbosa-Barros R, Shenasa M. Electrocardiographic Markers of Sudden Cardiac Death (Including Left Ventricular Hypertrophy). Card Electrophysiol Clin 2017; 9:605-629. [PMID: 29173405 DOI: 10.1016/j.ccep.2017.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Although the electrocardiograph (ECG) was invented more than 100 years ago, it remains the most commonly used test in clinical medicine. It is easy to perform, relatively cheap, and results are readily available. Interpretation, however, needs expertise and knowledge. New data, phenomenon, and syndromes are continually discovered by the ECG. It is important to differentiate between normal and abnormal ECGs first and then try to correlate the findings with clinical pathologies. Furthermore, the ECG is an integral part of the screening model for a variety of conditions such as channelopathies, athletes, preoperative risk profile, and remains the cardiologist's best friend.
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Affiliation(s)
- Andrés Ricardo Pérez-Riera
- Design of Studies and Scientific Writing Laboratory in the ABC School of Medicine, ABC Foundation, Av. Príncipe de Gales, 821 - Vila Principe de Gales, Santo André, São Paulo 09060-650, Brazil; Ambulatorio de cardiologia do Hospital do Coração, R. Des. Eliseu Guilherme, 147 - Paraiso, São Paulo, São Paulo 04004-030, Brazil
| | - Raimundo Barbosa-Barros
- Coronary Center of the Hospital de Messejana Dr Carlos Alberto Studart Gomes, Av. Frei Cirilo, 3480, Fortaleza, Ceará 60840-285, Brazil
| | - Mohammad Shenasa
- Department of Cardiovascular Services, Heart and Rhythm Medical Group, O'Connor Hospital, 105 North Bascom Avenue, Suite 204, San Jose, CA 95128, USA.
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12
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Assessment of the association between the presence of fragmented QRS and the predicted risk score of sudden cardiac death at 5 years in patients with hypertrophic cardiomyopathy. Anatol J Cardiol 2017; 18:54-61. [PMID: 28559533 PMCID: PMC5512199 DOI: 10.14744/anatoljcardiol.2017.7593] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE It has been shown that the presence of fragmented QRS (fQRS) is associated with poor prognosis in many cardiovascular diseases and in patients with hypertrophic cardiomyopathy (HCM). However, no study has shown an association with the absolute risk score of sudden cardiac death. The aim of this study was to determine the relationship between QRS and the predicted risk score of sudden cardiac death at 5 years (HCM Risk-SCD) in HCM patients. METHODS In total, 115 consecutive HCM patients were included in this prospective observational study. The patients were divided into two groups according to the presence [fQRS(+) group (n=65)] or absence [fQRS(-) group (n=50)] of fQRS on a 12-lead electrocardiogram (ECG). RESULTS The HCM Risk-SCD (%) HCM Risk-SCD (>6%) values and some echocardiographic parameters, including ventricular extrasystole, ventricular tachycardia, cardiopulmonary resuscitation, implantable cardioverter defibrillator implantation, appropriate shock, and heart failure at the time of admission, were significantly higher in the fQRS(+) group than in the fQRS(-) group (all p<0.05). Both univariate and multivariate analyses revealed fQRS and New York Heart Association (NYHA) class as independent predictors of HCM Risk-SCD. In a receiver operating characteristic (ROC) curve analysis, an HCM Risk-SCD value of >4 was identified as an effective cut-off point in fQRS for HCM. An HCM Risk-SCD value of >4 yielded a sensitivity of 77% and a specificity of 76%. CONCLUSION fQRS is determined to be an independent high-risk indicator of HCM Risk-SCD. It seems to be associated with increased ventricular arrhythmias and some echocardiographic parameters.
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13
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Morita H, Watanabe A, Morimoto Y, Kawada S, Tachibana M, Nakagawa K, Nishii N, Ito H. Distribution and Prognostic Significance of Fragmented QRS in Patients With Brugada Syndrome. Circ Arrhythm Electrophysiol 2017; 10:CIRCEP.116.004765. [DOI: 10.1161/circep.116.004765] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/14/2017] [Indexed: 11/16/2022]
Abstract
Background—
Fragmented QRS complexes (fQRS) in the right precordial leads are associated with occurrence of ventricular fibrillation (VF) in Brugada syndrome. Recently, epicardial mapping has revealed abnormal electrograms at the right ventricular (RV) outflow tract and inferior region of the right ventricle. fQRS may reflect the extent of the area of abnormal potentials, but whether the distribution of fQRS has prognostic value is not known.
Methods and Results—
We evaluated the existence of fQRS in 456 patients with Brugada syndrome, including 117 patients with syncope and 23 patients with VF. The region of fQRS was defined as inferior (II, III, and aVF), lateral (I, aVL, and V5 and V6), anterior (V3 and V4), RV (V1 and V2), and RV outflow tract (V1 and V2 at the third intercostal space). fQRS were present in 229 patients (RV outflow tract in 175, inferior in 135, RV in 90, and lateral in 16 patients). During follow-up (mean 91 months), 39 patients experienced VF. In univariable analyses, fQRS in any distribution and fQRS in each region excluding the RV were associated with VF. Multivariable analysis showed that fQRS in the inferior (hazard ratio, 3.9; confidence interval, 1.9–8.5), lateral (hazard ratio, 3.5; confidence interval, 1.2–8.2), and RV outflow tract (hazard ratio, 2.5; confidence interval, 1.2–5.6) were associated with VF events. The presence of multiple regions of fQRS was associated with worse prognosis.
Conclusions—
The distribution of fQRS is associated with prognosis in Brugada syndrome, further supporting the association of fQRS and arrhythmia substrate.
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Affiliation(s)
- Hiroshi Morita
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Atsuyuki Watanabe
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Yoshimasa Morimoto
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Satoshi Kawada
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Motomi Tachibana
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Koji Nakagawa
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Nobuhiro Nishii
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Hiroshi Ito
- From the Department of Cardiovascular Therapeutics (H.M., N.N.) and Department of Cardiovascular Medicine (A.W., Y.M., S.K., M.T., K.N., H.I.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
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14
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Steger A, Sinnecker D, Berkefeld A, Müller A, Gebhardt J, Dommasch M, Huster KM, Barthel P, Schmidt G. [Fragmented QRS. Relevance in clinical practice]. Herzschrittmacherther Elektrophysiol 2016; 26:235-41. [PMID: 26249048 DOI: 10.1007/s00399-015-0390-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The QRS complex represents the electrical depolarization of ventricular myocardium. In the case of an undisturbed depolarization, the QRS complex has a normal configuration and duration, but abnormal electrical conduction leads to widening of the QRS complex. The block of one of the Tawara branches results in a typical bundle branch block pattern. A QRS complex that cannot be classified as bundle branch block due to an atypical configuration and contains notched R or S waves is called a fragmented QRS. The underlying pathophysiologies are manifold and include myocardial scars induced by ischemic heart disease, myocardial fibrosis due to other diseases, primary cardiac pathologies as well as systemic diseases with cardiac involvement. Pathologies on the cellular level, such as ion channel dysfunctions, also correlate with fragmented QRS. Besides the diagnostic relevance, fragmented QRS is known to have prognostic properties, for example in identifying high risk patients with coronary artery disease, cardiomyopathy, Brugada syndrome and acquired long QT syndrome; however, fragmented QRS may also be detected in ECGs of healthy individuals.
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Affiliation(s)
- Alexander Steger
- I. Medizinische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München, Ismaninger Straße 22, 81675, München, Deutschland,
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15
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Pérez-Riera AR, Barbosa-Barros R, de Lucca AA, Viana MJ, de Abreu LC. Mid-ventricular Hypertrophic Obstructive Cardiomyopathy with Apical Aneurysm Complicated with Syncope by Sustained Monomorphic Ventricular Tachycardia. Ann Noninvasive Electrocardiol 2016; 21:618-621. [PMID: 27422472 DOI: 10.1111/anec.12377] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Mid-ventricular hypertrophic obstructive cardiomyopathy with secondary formation of apical aneurysm is a rare variant of hypertrophic cardiomyopathy. They have a unique behavior because unlike other variants it causes sustained monomorphic ventricular tachycardia, which makes it particularly severe.
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Affiliation(s)
| | - Raimundo Barbosa-Barros
- Coronary Center of the Messejana Hospital Dr. Carlos Alberto Studart Gomes, Fortaleza, CE, Brazil
| | | | - Mujimbi Jose Viana
- ABC Faculty of Medicine - ABC Foundation, Santo André, São Paulo, Brazil
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16
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Debonnaire P, Katsanos S, Joyce E, VAN DEN Brink OVW, Atsma DE, Schalij MJ, Bax JJ, Delgado V, Marsan NA. QRS Fragmentation and QTc Duration Relate to Malignant Ventricular Tachyarrhythmias and Sudden Cardiac Death in Patients with Hypertrophic Cardiomyopathy. J Cardiovasc Electrophysiol 2015; 26:547-55. [PMID: 25648421 DOI: 10.1111/jce.12629] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 01/19/2015] [Accepted: 01/27/2015] [Indexed: 10/24/2022]
Abstract
BACKGROUND QRS fragmentation (fQRS) and prolonged QTc interval on surface ECG are prognostic in various cardiomyopathies other than hypertrophic cardiomyopathy (HCM). The association between fQRS and prolonged QTc duration with occurrence of ventricular tachyarrhythmias or sudden cardiac death (VTA/SCD) in patients with HCM was explored. METHODS AND RESULTS One hundred and ninety-five clinical HCM patients were studied. QTc duration was derived applying Bazett's formula; fQRS was defined as presence of various RSR' patterns, R or S notching and/or >1 additional R wave in any non-aVR lead in patients without pacing or (in)complete bundle branch block. The endpoints comprised SCD, ECG documented sustained VTA (tachycardia or fibrillation) or appropriate implantable cardioverter defibrillator (ICD) therapies (antitachycardia pacing [ATP] or shock) for VTA in ICD recipients (n = 58 [30%]). QT prolonging drugs recipients were excluded. After a median follow-up of 5.7 years (IQR 2.7-9.1), 26 (13%) patients experienced VTA or SCD. Patients with fQRS in ≥3 territories (inferior, lateral, septal, and/or anterior) (p = 0.004) or QTc ≥460 ms (p = 0.009) had worse cumulative survival free of VTA/SCD than patients with fQRS in <3 territories or QTc <460 ms. fQRS in ≥3 territories (ß 4.5, p = 0.020, 95%CI 1.41-14.1) and QTc ≥460 ms (ß 2.7, p = 0.037, 95%CI 1.12-6.33) were independently associated with VTA/SCD. Likelihood ratio test indicated assessment of fQRS and QTc on top of conventional SCD risk factors provides incremental predictive value for VTA/SCD (p = 0.035). CONCLUSIONS Both fQRS in ≥3 territories and QTc duration are associated with VTA/SCD in HCM patients, independently of and incremental to conventional SCD risk factors.
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Affiliation(s)
- Philippe Debonnaire
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands.,Sint-Jan Hospital Bruges, Department of Cardiology, Bruges, Belgium
| | - Spyridon Katsanos
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | - Emer Joyce
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | | | - Douwe E Atsma
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | - Martin J Schalij
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | - Jeroen J Bax
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | - Victoria Delgado
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
| | - Nina Ajmone Marsan
- Leiden University Medical Centre, Department of Cardiology, Leiden, the Netherlands
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17
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Peters S. QRS fragmentation in acquired long QT syndrome does not always predict torsades of pointes tachycardia: a case report. Herz 2014; 39:960-2. [DOI: 10.1007/s00059-013-3888-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 06/18/2013] [Indexed: 05/27/2023]
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18
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Nomura A, Konno T, Fujita T, Tanaka Y, Nagata Y, Tsuda T, Hodatsu A, Sakata K, Nakamura H, Kawashiri MA, Fujino N, Yamagishi M, Hayashi K. Fragmented QRS predicts heart failure progression in patients with hypertrophic cardiomyopathy. Circ J 2014; 79:136-43. [PMID: 25381793 DOI: 10.1253/circj.cj-14-0822] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Although fragmented QRS complex (frag-QRS) reflecting intra-ventricular conduction delay has been shown to be a prognostic marker for cardiac events, few data exist regarding the impact of frag-QRS on cardiac events in hypertrophic cardiomyopathy (HCM). METHODS AND RESULTS Ninety-four HCM patients (56 male; mean age, 58 ± 17 years) were retrospectively investigated. Frag-QRS was defined as the presence of various RsR' patterns in at least 2 contiguous ECG leads. Major arrhythmic events (MAE) were defined as sudden cardiac death, and combined sustained ventricular tachycardia/ventricular fibrillation. New-onset atrial fibrillation (AF) was diagnosed based on ECG during provisional or routine medical examination. Heart failure (HF) with hospitalization was defined as hospital admission due to subjective or objective symptoms. Frag-QRS was detected in 31 patients (33%).TNNI3 was the most frequent disease-causing gene. Median follow-up was 4.6 years. The 4-year cumulative survival rates of cardiac death, MAE, new-onset AF and HF with hospitalization were 97.6%, 94.6%, 87.5% and 89.3%, respectively. On multivariate analysis, frag-QRS was significantly associated with HF with hospitalization (adjusted hazard ratios [95% confidence intervals]: 5.4 [1.2-36], P=0.03). Moreover, HF-free survival was significantly lower in the frag-QRS (+) group compared to the frag-QRS (-) group (79.0% vs. 95.1%, P=0.03). CONCLUSIONS Frag-QRS is associated with HF with hospitalization in HCM patients who had a unique distribution of gene mutations.
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Affiliation(s)
- Akihiro Nomura
- Division of Cardiovascular Medicine, Kanazawa University Graduate School of Medicine
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19
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Sen F, Yılmaz S, Kuyumcu MS, Ozeke O, Balcı MM, Aydoğdu S. The Presence of Fragmented QRS on 12-Lead Electrocardiography in Patients with Coronary Artery Ectasia. Korean Circ J 2014; 44:307-11. [PMID: 25278983 PMCID: PMC4180607 DOI: 10.4070/kcj.2014.44.5.307] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/15/2014] [Accepted: 08/04/2014] [Indexed: 01/14/2023] Open
Abstract
Background and Objectives Coronary artery ectasia (CAE) is an angiographic finding characterized by dilation of an arterial segment with a diameter at least 1.5 times that of its adjacent normal coronary artery. Fragmented QRS (fQRS) complexes are electrocardiographic signals which reflect altered ventricular conduction around regions of a myocardial scar and/or ischaemia. In the present study, we aimed to evaluate the presence of fQRS in patients with CAE. Subjects and Methods The study population included 100 patients with isolated CAE without coronary artery disease (CAD) and 80 angiographically normal controls. fQRS was defined as the presence of an additional R wave or notching of R or S wave or the presence of fragmentation in two contiguous leads corresponding to a major coronary artery territory. Results The two groups were similar in terms of age, sex, hypertension, dyslipidemia, and family history of CAD. The presence of fQRS was significantly (p<0.05) higher in the CAE group than that in the normal coronary artery group (29% vs. 6.2%, p=0.008). Isolated CAE were detected most commonly in the right coronary artery (61%), followed by left anterior descending artery (52%), left circumflex artery (36%), and left main artery (9%). Multivariate stepwise logistic regression analysis showed that CAE {odds ratio (OR) 1.412; 95% confidence interval (CI) 1.085-1.541; p=0.003} and diabetes (OR 1.310; 95% CI 1.025-1.482; p=0.041) were independently associated with fQRS. Conclusion The presence of fragmented QRS associated with increased risk for arrhythmias and cardiovascular mortality was significantly higher in patients with CAE than in patient with normal coronary artery. Further studies are needed to determine whether the presence of fragmented QRS is a possible new risk factor for patients with CAE.
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Affiliation(s)
- Fatih Sen
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Samet Yılmaz
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Mevlüt Serdar Kuyumcu
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Ozcan Ozeke
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Mustafa Mücahit Balcı
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Sinan Aydoğdu
- Turkey Yuksek Ihtisas Education and Research Hospital, Cardiology Clinic, Ankara, Turkey
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REN LAN, LIU ZHENG, JIA YUHE, FANG PIHUA, PU JIELIN, ZHANG SHU. Electrocardiographic Difference between Ventricular Arrhythmias from the Right Ventricular Outflow Tract and Idiopathic Right Ventricular Arrhythmias. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2014; 37:1658-64. [DOI: 10.1111/pace.12463] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 05/12/2014] [Accepted: 05/31/2014] [Indexed: 02/01/2023]
Affiliation(s)
- LAN REN
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
| | - ZHENG LIU
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
| | - YUHE JIA
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
| | - PIHUA FANG
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
| | - JIELIN PU
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
| | - SHU ZHANG
- Cardiac Arrhythmia Center; State Key Laboratory of Cardiovascular Disease; Fuwai Hospital; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing People's Republic of China
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21
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Fragmented QRS complexes-a novel but underutilized electrocardiograhic marker of heart disease. Crit Pathw Cardiol 2014; 12:181-3. [PMID: 24240545 DOI: 10.1097/hpc.0b013e31829e005d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The electrocardiogram is the mainstay approach for diagnosing a myocardial infarction (MI). The diagnosis of an old MI and the identification of myocardial scar via the electrocardiogram are difficult because there are no other specific signs for a non-Q-wave MI. In this article, we will review the fragmented QRS and its role in identifying myocardial scar and depolarization abnormalities in patients with coronary artery disease.
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Jain R, Singh R, Yamini S, Das MK. Fragmented ECG as a risk marker in cardiovascular diseases. Curr Cardiol Rev 2014; 10:277-86. [PMID: 24827794 PMCID: PMC4040879 DOI: 10.2174/1573403x10666140514103451] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 06/10/2013] [Accepted: 01/28/2014] [Indexed: 12/18/2022] Open
Abstract
Various noninvasive tests for risk stratification of sudden cardiac death (SCD) were studied, mostly in the context of structural heart disease such as coronary artery disease (CAD), cardiomyopathy and heart failure but have low positive predictive value for SCD. Fragmented QRS complexes (fQRS) on a 12-lead ECG is a marker of depolarization abnormality. fQRS include presence of various morphologies of the QRS wave with or without a Q wave and includes the presence of an additional R wave (R’) or notching in the nadir of the R’ (fragmentation) in two contiguous leads, corresponding to a major coronary artery territory. fQRS represents conduction delay from inhomogeneous activation of the ventricles due to myocardial scar. It has a high predictive value for myocardial scar and mortality in patients CAD. fQRS also predicts arrhythmic events and mortality in patients with implantable cardioverter defibrillator. It also signifies poor prognosis in patients with nonischemic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy and Brugada syndrome. However, fQRS is a nonspecific finding and its diagnostic prognostic should only be interpreted in the presence of pertinent clinical evidence and type of myocardial involvement (structural vs. structurally normal heart).
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Affiliation(s)
| | | | | | - Mithilesh K Das
- Krannert Institute of Cardiology, Indiana University Health, 1800 North Capitol Avenue, Indianapolis, IN 46202, USA.
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Temiz A, Gazi E, Altun B, Güngör Ö, Barutçu A, Bekler A, Tan YZ, Yener AÜ, Saçar M, Çölkesen Y. Fragmented QRS is associated with frequency of premature ventricular contractions in patients without overt cardiac disease. Anatol J Cardiol 2014; 15:456-62. [PMID: 25430411 PMCID: PMC5779136 DOI: 10.5152/akd.2014.5467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Objective: In this study, we aimed to demonstrate whether the presence of fragmented QRS (fQRS) is associated with the frequency of premature ventricular contractions (PVCs). Methods: We retrospectively analyzed 282 cases by 24-hour Holter monitorings (HMs) between August 2012 and February 2013. Firstly, the patients were divided into 2 groups with respect to presence of fQRS and then divided into 3 groups with respect to frequency of PVCs as Group 1: seldom PVC (<120 PVCs/day), Group 2: moderate-frequency PVC (120-720 PVCs/day), and Group 3: frequent PVC (>720 PVCs/day). We investigated the predictors of frequent PVCs by using multinomial logistic regression analysis. Results: Ninety-eight patients had fQRS. There was no difference between the 2 groups with respect to body mass index, gender, hypertension, and diabetes mellitus. Patients with fQRS were older (54.9±15.6 vs. 47.0±16.3, p<0.001) and had more family history of coronary artery disease (25% vs. 13%, p=0.012). Patients with fQRS was more likely to be on aspirin therapy (28.6% vs. 10.4%, p<0.001) and have a larger left atrium diameter (33.5±5.7 vs. 30.4±5.8, p=0.001). Presence of fQRS was significantly associated with the frequency of PVCs (for frequent PVC 27.7% vs. 7.6%, p<0.001; for moderate-frequency PVC 18.4% vs. 11.4%, p=0.012); 26.2% of Group 1 (n=202) had fQRS, 46.2% of Group 2 (n=39) had fQRS, and 65.9% of Group 3 (n=41) had fQRS. In the multinomial regression analysis, only age (odds ratio: 4.24, 95% confidence interval 2.08-8.64, p=0.001) and fQRS (odds ratio: 2.11, 95% confidence interval 1.00-4.45, p=0.05) were predictors of frequent PVCs. Conclusion: This study demonstrated that the presence of fQRS is associated with frequent PVCs in patients without overt structural heart disease.
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Affiliation(s)
- Ahmet Temiz
- Department of Cardiology, Faculty of Medicine, Çanakkale Onsekiz Mart University; Çanakkale-Turkey.
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Electrocardiographic parameters and fatal arrhythmic events in patients with Brugada syndrome: combination of depolarization and repolarization abnormalities. J Am Coll Cardiol 2014; 63:2131-2138. [PMID: 24703917 DOI: 10.1016/j.jacc.2014.01.072] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 01/07/2014] [Accepted: 01/14/2014] [Indexed: 01/02/2023]
Abstract
OBJECTIVES This study aimed to determine the usefulness of the combination of several electrocardiographic markers on risk assessment of ventricular fibrillation (VF) in patients with Brugada syndrome (BrS). BACKGROUND Detection of high-/low-risk BrS patients using a noninvasive method is an important issue in the clinical setting. Several electrocardiographic markers related to depolarization and repolarization abnormalities have been reported, but the relationship and usefulness of these parameters in VF events are unclear. METHODS Baseline characteristics of 246 consecutive patients (236 men; mean age, 47.6 ± 13.6 years) with a Brugada-type electrocardiogram, including 13 patients with a history of VF and 40 patients with a history of syncope episodes, were retrospectively analyzed. During the mean follow-up period of 45.1 months, VF in 23 patients and sudden cardiac death (SCD) in 1 patient were observed. Clinical/genetic and electrocardiographic parameters were compared with VF/SCD events. RESULTS On univariate analysis, a history of VF and syncope episodes, paroxysmal atrial fibrillation, spontaneous type 1 pattern in the precordial leads, and electrocardiographic markers of depolarization abnormalities (QRS duration ≥120 ms, and fragmented QRS [f-QRS]) and those of repolarization abnormalities (inferolateral early repolarization [ER] pattern and QT prolongation) were associated with later cardiac events. On multivariable analysis, a history of VF and syncope episodes, inferolateral ER pattern, and f-QRS were independent predictors of documented VF and SCD (odds ratios: 19.61, 28.57, 2.87, and 5.21, respectively; p < 0.05). Kaplan-Meier curves showed that the presence/absence of inferolateral ER and f-QRS predicted a worse/better prognosis (log-rank test, p < 0.01). CONCLUSIONS The combination of depolarization and repolarization abnormalities in BrS is associated with later VF events. The combination of these abnormalities is useful for detecting high- and low-risk BrS patients.
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Shimizu M, Nishizaki M, Yamawake N, Fujii H, Sakurada H, Isobe M, Hiraoka M. J wave and fragmented QRS formation during the hyperacute phase in Takotsubo cardiomyopathy. Circ J 2014; 78:943-9. [PMID: 24500071 DOI: 10.1253/circj.cj-13-1296] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The J wave and fragmented QRS (fQRS) on electrocardiography are suggested to be closely related to cardiac arrhythmogenesis. Takotsubo cardiomyopathy (TTC) occasionally causes fatal cardiac conditions including life-threatening ventricular arrhythmia. There has been, however, only 1 case report describing the J wave in TTC, and fQRS has not been reported thus far in relation to clinical courses and prognosis. METHODS AND RESULTS J wave and fQRS formation were investigated in 31 consecutive patients with TTC. Nine patients (29%) had J waves and/or fQRS (group A), whereas the remaining 22 did not (group B). The J wave (4 patients), fQRS (4 patients), or both (1 patient) appeared transiently during the hyperacute phase. Left ventricular ejection fraction was significantly lower in group A. Summed defect score of single-photon emission computed tomography using iodine 123 beta-methyl-p-iodophenyl-pentadecanoic acid, and creatine kinase MB isozyme (CKMB) were significantly higher in group A. On multivariate analysis CKMB was a significant indicator of J wave or fQRS. Moreover, the J wave was a significant indicator for cardiac death and/or ventricular tachyarrhythmia (odds ratio, 11.5; P=0.026). CONCLUSIONS Patients with TTC frequently had J waves and/or fQRS during the hyperacute phase, and which were associated with myocardial damage. J wave was also an indicator for cardiac death and/or ventricular tachyarrhythmia. J waves and fQRS may be useful markers for myocardial damage.
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Affiliation(s)
- Masato Shimizu
- Department of Cardiology, Yokohama Minami Kyosai Hospital
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Apiyasawat S, Sahasthas D, Ngarmukos T, Chandanamattha P, Likittanasombat K. Fragmented QRS as a Predictor of Appropriate Implantable Cardioverter-defibrillator Therapy. Indian Pacing Electrophysiol J 2014; 14:4-11. [PMID: 24493911 PMCID: PMC3878583 DOI: 10.1016/s0972-6292(16)30710-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background Fragmented QRS (fQRS) has been shown to be a marker of local myocardial conduction abnormalities and a predictor of cardiac events in selected populations. We hypothesized that the presence of a fQRS might predict arrhythmic events in patients who received an implantable cardioverter-defibrillator (ICD), regardless of the indications for implantation. Methods and Results A cohort of 107 consecutive patients (mean age, 53 years; 82% male) who underwent an ICD implantation was studied. We defined fQRS, on a routine 12-lead ECG, as the presence of an additional R wave or notching in the nadir of the S wave in 2 consecutive leads corresponding to a major coronary artery territory. In the presence of bundle branch block, more than 2 notches in the R or S waves in 2 consecutive leads were required to characterize fQRS. Patients were followed for 21.3±23 months for appropriate ICD therapy (antitachycardia pacing and/or shock). ICDs were implanted predominantly in patients with ischemic cardiomyopathy (N=45, 42.1%), followed by Brugada syndrome (N=26, 24.3%). fQRS presented in 42 patients (39.3%). During follow-up, patients with fQRS received more appropriate ICD therapy than those without fQRS (45.2% vs. 10.8%, P<0.0001). After adjustment for covariates, fQRS remained an independent predictor for appropriate ICD therapy (hazard ratio=5.32, 95% confidence interval=2.11-13.37, P<0.0001). Conclusion The presence of fQRS appeared to be directly associated with appropriate ICD therapy.
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Affiliation(s)
- Marek Malik
- St. Paul's Cardiac Electrophysiology and St. George's, University of London, London, UK
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Baranchuk A, Femenia F, López-Diez JC, Muratore C, Valentino M, Retyk E, Galizio N, Di Toro D, Alonso K, Hopman WM, Miranda R. Fragmented surface ECG was a poor predictor of appropriate therapies in patients with Chagas' cardiomyopathy and ICD implantation (Fragmented ECG in CHAgas' Cardiomyopathy Study). Ann Noninvasive Electrocardiol 2013; 19:43-9. [PMID: 24460805 DOI: 10.1111/anec.12077] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Main causes of death in chronic Chagas' cardiomyopathy (CChC) are progressive congestive heart failure and sudden cardiac death. Implantable cardioverter defibrillators (ICD) have been proved an effective therapy to prevent sudden death in patients with CChC. Identification of predictors of sudden death remains a challenge. OBJECTIVE To determine whether surface fragmented ECG (fQRS) helps identifying patients with CChC and ICDs at higher risk of presenting appropriate ICD therapies. METHODS Multicenter retrospective study. All patients with CChC and ICDs were analyzed. Clinical demographics, surface ECG, and ICD therapies were collected. RESULTS A total of 98 patients were analyzed. Another four cases were excluded due to pacing dependency. Mean age was 55.5 ± 10.4 years, male gender 65%, heart failure New York Heart Association class I 47% and II 38%. Mean left ventricular ejection fraction (LVEF) 39.6 ± 11.8%. The indication for ICD was secondary prevention in 70% of patients. fQRS was found in 56 patients (59.6%). Location of fragmentation was inferior (57.1%), lateral (35.7%), and anterior (44.6%). Rsr pattern was the more prevalent (57.1%). Predictors of appropriate therapy in the multivariate model were: increased age (P = 0.01), secondary prevention indication (P = 0.01), ventricular pacing >50% of the time (P = 0.004), and LVEF <30% (P = 0.01). The presence of fQRS did not identify patients at higher risk of presenting appropriate therapies delivered by the ICD (P = 0.87); regardless of QRS interval duration. CONCLUSIONS fQRS is highly prevalent among patients with CChC. It has been found a poor predictor of appropriate therapies delivered by the ICD in this population.
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Fragmented QRS as a predictor of arrhythmic events in patients with hypertrophic obstructive cardiomyopathy. J Interv Card Electrophysiol 2013; 38:159-65. [PMID: 24013705 DOI: 10.1007/s10840-013-9829-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 08/13/2013] [Indexed: 01/18/2023]
Abstract
OBJECTIVES This study aims to determine whether fragmented QRS (fQRS) in the surface electrocardiogram (ECG) at implantable cardioverter defibrillator (ICD) implant can predict arrhythmic events using appropriate therapy delivered by the ICD as a surrogate. BACKGROUND Hypertrophic obstructive cardiomyopathy (HOCM) is a genetic disorder associated with life-threatening arrhythmias frequently requiring an ICD. Seeking a noninvasive method of risk stratification remains a challenge. METHODS This paper is a retrospective, multicenter study of patients with HOCM and ICD. Surface 12-lead ECGs were analyzed. Appropriate therapy was validated by a blinded Core Lab. Univariate and multivariate analyses were performed. A p value of <0.05 was considered significant. RESULTS We included 102 patients from 13 centers. Mean age at implant was 41.16 ± 18.25 years, 52% were male. Mean left ventricular ejection fraction was 61.56 ± 9.46% and two thirds had heart failure according to the New York Heart Association class I. Secondary prophylaxis ICD implantation was the indication for implant in 40.2% of cases. About half received a single-chamber ICD. fQRS was present at the time of diagnosis in 21 and in 54% at ICD implant. At a mean follow-up of 47.8 ± 39.3 months, 41 patients (40.2%) presented with appropriate therapy. In a multivariate logistic regression, predictors of appropriate therapy included fQRS at implant (odds ratio [OR], 16.4; 95% confidence interval [CI], 3.6-74.0; p = 0.0003), history of combined ventricular tachycardia/fibrillation/sudden death (OR, 14.3; 95% CI, 3.2-69.3; p = 0.001) and history of syncope (OR, 5.5; 95% CI, 1.5-20.4; p = 0.009). Ten deaths (9.8%) occurred during the follow-up. fQRS in the lateral location increased the risk of appropriate therapy (p < 0.0001). CONCLUSIONS fQRS predicts arrhythmic events in patients with HOCM and should be considered in a model of risk stratification.
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Perlini S, Salinaro F, Cappelli F, Perfetto F, Bergesio F, Alogna A, Mussinelli R, Boldrini M, Raimondi A, Musca F, Palladini G, Merlini G. Prognostic value of fragmented QRS in cardiac AL amyloidosis. Int J Cardiol 2013; 167:2156-61. [DOI: 10.1016/j.ijcard.2012.05.097] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 05/16/2012] [Accepted: 05/27/2012] [Indexed: 11/16/2022]
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Canpolat U, Kabakçi G, Aytemir K, Dural M, Sahiner L, Yorgun H, Sunman H, Bariş Kaya E, Tokgözoğlu L, Oto A. Fragmented QRS complex predicts the arrhythmic events in patients with arrhythmogenic right ventricular cardiomyopathy/dysplasia. J Cardiovasc Electrophysiol 2013; 24:1260-6. [PMID: 23845044 DOI: 10.1111/jce.12202] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Revised: 05/22/2013] [Accepted: 05/24/2013] [Indexed: 12/27/2022]
Abstract
BACKGROUND Fragmented QRS (frQRS) complex, with various morphology, has been recently described as a diagnostic criterion of arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D). However, there are little data regarding the prognostic role of frQRS in these patients. Therefore, we aimed to investigate the association of frQRS with arrhythmic events in patients with ARVC/D. METHODS Seventy-eight patients (51 men, 65.4%; mean age: 31.25 ± 11.5 years) with the diagnosis of ARVC/D according to 2010 modified Task Force Criteria were analyzed retrospectively. Baseline ECG evaluation revealed frQRS complex in 46 patients (59%). Eleven patients with complete/incomplete right bundle branch block were excluded from the study. The phenomenon of frQRS was defined as deflections at the beginning of the QRS complex, on top of the R-wave, or in the nadir of the S-wave similar to the definition in CAD in either one right precordial lead or in more than one lead including all standard ECG leads. RESULTS During 38 ± 14 months follow-up period, 3 patients (3.8%) died suddenly, 36 patients (46.1%) experienced arrhythmic events (32 ventricular tachycardias [VTs] and 4 ventricular fibrillation [VF], 30 in the ICD group). The frQRS was significantly associated with arrhythmic events (P < 0.001). Also, the number of ECG leads with frQRS complex was higher in patients with arrhythmic events (5.08 ± 2.5 vs 1.14 ± 1.7, P < 0.001, respectively). CONCLUSION The frQRS complex on standard 12-lead ECG predicts fatal and nonfatal arrhythmic events in patients with ARVC/D. Therefore, large scale and prospective studies are needed to confirm those findings.
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Affiliation(s)
- Uğur Canpolat
- Türkiye Yüksek İhtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
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Affiliation(s)
- Kengo F. Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
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Morita H. The compound mutation, a model for acquire long QT syndrome. J Cardiol Cases 2012; 6:e187-e188. [PMID: 30533103 PMCID: PMC6269401 DOI: 10.1016/j.jccase.2012.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Indexed: 12/05/2022] Open
Affiliation(s)
- Hiroshi Morita
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8558, Japan
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
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Abstract
Fragmented QRS (fQRS) is a convenient marker of myocardial scar evaluated by 12-lead electrocardiogram (ECG) recording. fQRS is defined as additional spikes within the QRS complex. In patients with CAD, fQRS was associated with myocardial scar detected by single photon emission tomography and was a predictor of cardiac events. fQRS was also a predictor of mortality and arrhythmic events in patients with reduced left ventricular function. The usefulness of fQRS for detecting myocardial scar and for identifying high-risk patients has been expanded to various cardiac diseases, such as cardiac sarcoidosis, arrhythmogenic right ventricular cardiomyopathy, acute coronary syndrome, Brugada syndrome, and acquired long QT syndrome. fQRS can be applied to patients with wide QRS complexes and is associated with myocardial scar and prognosis. Myocardial scar detected by fQRS is associated with subsequent ventricular dysfunction and heart failure and is a substrate for reentrant ventricular tachyarrhythmias.
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Affiliation(s)
- Yutaka Take
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 700-8558, Okayama, Japan
- Department of Cardiovascular Medicine, Sakakibara Heart Institute of Okayama, 700-0823, Okayama, Japan
| | - Hiroshi Morita
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 700-8558, Okayama, Japan
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 700-8558, Okayama, Japan
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PERRIN MARKJONATHAN, GOLLOB MICHAELHOWARD, BIRNIE DAVIDHUGH, NERY PABLOBALBUENA, KEREN ARIEH. Degenerating RegeneratingTorsades de Pointes. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2012; 36:e80-3. [DOI: 10.1111/j.1540-8159.2012.03374.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2011] [Revised: 08/12/2011] [Accepted: 12/03/2011] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - ARIEH KEREN
- Ottawa Heart Institute; University of Ottawa; Ottawa; Canada
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Chiladakis J, Kalogeropoulos A, Zagkli F, Koutsogiannis N, Chouchoulis K, Alexopoulos D. Predicting Torsade de Pointes in Acquired Long QT Syndrome: Optimal Identification of Critical QT Interval Prolongation. Cardiology 2012; 122:3-11. [DOI: 10.1159/000338345] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 03/20/2012] [Indexed: 11/19/2022]
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Moss AJ. Fragmented QRS: The new high-risk kid on the block in acquired long QT syndrome. Heart Rhythm 2010; 7:1815-6. [DOI: 10.1016/j.hrthm.2010.09.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Indexed: 11/24/2022]
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