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Sen Ö, Yilmaz S, Sen F, Balcı KG, Akboga MK, Yayla C, Özeke Ö. Retracted: T-peak to T-end Interval Predicts Appropriate Shocks in Patients with Heart Failure Undergoing Implantable Cardioverter Defibrillator Implantation for Primary Prophylaxis. Ann Noninvasive Electrocardiol 2024; 29:10.1111/anec.12383. [PMID: 27265779 PMCID: PMC10825066 DOI: 10.1111/anec.12383] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND T-wave peak to T-wave end interval (Tp-e) correlates with dispersion of ventricular repolarization. The purpose of this study was to assess the ability of Tp-e to predict appropriate implantable cardioverter defibrillator (ICD) shocks and all-cause mortality in patients who underwent ICD implantation for primary prophylaxis. METHODS Two hundred twenty-eight patients with left ventricular ejection fraction ≤35% and an ICD implanted were followed-up prospectively. Patients divided into two subgroups according to presence of appropriate ICD shocks (Group 1: 112 patients with ICD shocks, Group 2: 116 patients without shocks). End points were appropriate ICD therapy due to ventricular tachycardia (VT)/ventricular fibrillation (VF), death, and a combined end point of VT/VF or death. RESULTS During a mean follow-up of 22.3 ± 7.7 months, appropriate ICD shocks were observed in 112 of 228 patients (49.1%). The mean duration of the Tp-e Group 1 was significantly longer than Group 2 (115.3 ± 22.2 vs 104.7 ± 20.2 ms, P < 0.001). Ischemic etiology and Tp-e duration were found to be independent predictors of ICD therapy. When the patients were divided into two groups based on Tp-e interval, there was no significant difference regarding the mortality between groups (21.2% vs 21.8%, P: 0.186). However, appropriate ICD shocks due to VT/VF (37.5% vs 58.8%, P < 0.001) and combined end point (39.4% vs 64.5%, P: 0.002) were significantly higher in patients with longer Tp-e group. CONCLUSIONS Tp-e interval independently predicts appropriate ICD shocks in patients with systolic dysfunction and ICDs implanted for primary prevention.
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Affiliation(s)
- Ömer Sen
- Cardiology ClinicAdana Numune Training and Research HospitalAdanaTurkey
| | - Samet Yilmaz
- Cardiovascular DepartmentYozgat State HospitalYozgatandTurkey
| | - Fatih Sen
- Cardiology ClinicTurkey Yuksek Ihtisas Training and Research HospitalAnkaraTurkey
| | - Kevser G. Balcı
- Cardiology ClinicTurkey Yuksek Ihtisas Training and Research HospitalAnkaraTurkey
| | - Mehmet K. Akboga
- Cardiology ClinicTurkey Yuksek Ihtisas Training and Research HospitalAnkaraTurkey
| | - Cagrı Yayla
- Cardiology ClinicTurkey Yuksek Ihtisas Training and Research HospitalAnkaraTurkey
| | - Özcan Özeke
- Cardiology ClinicTurkey Yuksek Ihtisas Training and Research HospitalAnkaraTurkey
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Nakase M, Yahagi K, Horiuchi Y, Asami M, Yuzawa H, Komiyama K, Tanaka J, Aoki J, Tanabe K. Effect of dapagliflozin on ventricular repolarization in patients with heart failure with reduced ejection fraction. Heart Vessels 2023; 38:1414-1421. [PMID: 37700071 DOI: 10.1007/s00380-023-02298-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 07/27/2023] [Indexed: 09/14/2023]
Abstract
Whether sodium-glucose cotransporter-2 inhibitors (SGLT2is) reduce ventricular arrhythmias and sudden cardiac death is controversial. Ventricular repolarization heterogeneity is associated with ventricular arrhythmias; however, the effect of SGLT2is on ventricular repolarization in patients with heart failure with reduced ejection fraction (HFrEF) has not been fully investigated. We prospectively evaluated 31 HFrEF patients in sinus rhythm who were newly started on dapagliflozin 10 mg/day. Changes in QT interval, corrected QT interval (QTc), QT dispersion (QTD), corrected QTD (QTcD), T peak to T end (TpTe), TpTe/QT ratio, and TpTe/QTc ratio were evaluated at 1-year follow-up. QT interval, QTc interval, QTD, QTcD, TpTe, and TpTe/QTc ratio decreased significantly at 1-year follow-up (427.6 ± 52.6 ms vs. 415.4 ± 35.1 ms; p = 0.047, 437.1 ± 37.3 ms vs. 425.6 ± 22.7 ms; p = 0.019, 54.1 ± 11.8 ms vs. 47.6 ± 14.7 ms; p = 0.003, 56.0 ± 11.2 ms vs. 49.4 ± 12.3 ms; p = 0.004, 98.0 ± 15.6 ms vs. 85.5 ± 20.9 ms; p = 0.018, and 0.225 ± 0.035 vs. 0.202 ± 0.051; p = 0.044, respectively). TpTe/QT ratio did not change significantly (0.231 ± 0.040 vs. 0.208 ± 0.054; p = 0.052). QT interval, QTD, and TpTe were significantly reduced 1 year after dapagliflozin treatment in patients with HFrEF. The beneficial effect of dapagliflozin on the heterogeneity of ventricular repolarization may contribute to the suppression of ventricular arrhythmias.Registry information https://center6.umin.ac.jp/cgi-open-bin/ctr/ctr_view.cgi?recptno=R000049428 . Registry number: UMIN000044902.
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Affiliation(s)
- Masaaki Nakase
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Kazuyuki Yahagi
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan.
| | - Yu Horiuchi
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Masahiko Asami
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Hitomi Yuzawa
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Kota Komiyama
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Jun Tanaka
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Jiro Aoki
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
| | - Kengo Tanabe
- Division of Cardiology, Mitsui Memorial Hospital, Kanda-Izumicho 1, Chiyoda-ku, Tokyo, 101-8643, Japan
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A Longer T peak-T end Interval Is Associated with a Higher Risk of Death: A Meta-Analysis. J Clin Med 2023; 12:jcm12030992. [PMID: 36769640 PMCID: PMC9917475 DOI: 10.3390/jcm12030992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/15/2023] [Accepted: 01/19/2023] [Indexed: 01/31/2023] Open
Abstract
A noninvasive tool for cardiovascular risk stratification has not yet been established in the clinical routine analysis. Previous studies suggest a prolonged Tpeak-Tend interval (the interval from the peak to the end of the T-wave) to be predictive of death. This meta-analysis was designed to systematically evaluate the association of the Tpeak-Tend interval with mortality outcomes. Medline (via PubMed), Embase and the Cochrane Library were searched from 1 January 2008 to 21 July 2020 for articles reporting the ascertainment of the Tpeak-Tend interval and observation of all-cause-mortality. The search yielded 1920 citations, of which 133 full-texts were retrieved and 29 observational studies involving 23,114 patients met the final criteria. All-cause deaths had longer Tpeak-Tend intervals compared to survivors by a standardized mean difference of 0.41 (95% CI 0.23-0.58) and patients with a long Tpeak-Tend interval had a higher risk of all-cause death compared to patients with a short Tpeak-Tend interval by an overall odds ratio of 2.33 (95% CI 1.57-3.45). Heart rate correction, electrocardiographic (ECG) measurement methods and the selection of ECG leads were major sources of heterogeneity. Subgroup analyses revealed that heart rate correction did not affect the association of the Tpeak-Tend interval with mortality outcomes, whereas this finding was not evident in all measurement methods. The Tpeak-Tend interval was found to be significantly associated with all-cause mortality. Further studies are warranted to confirm the prognostic value of the Tpeak-Tend interval.
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Prognostic value of infarct-related-lead Tpeak-Tend/QT ratio in patients with ST-segment elevation myocardial infarction. Heart Vessels 2021; 37:539-548. [PMID: 34599658 DOI: 10.1007/s00380-021-01950-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/24/2021] [Indexed: 10/20/2022]
Abstract
Tpeak-Tend/QT ratio (Tp-e/QT) in patients with ST-segment elevation myocardial infarction (STEMI) is reportedly associated with major adverse cardiac events (MACEs). However, Tp-e/QT measurement methods are controversial, and few studies have clarified the effect of different Tp-e/QT measures on prognosis. Our study is the first to investigate the advantages of the Tp-e/QT measured by infarct-related-lead method in predicting MACEs during hospitalization and long-term mortality in patients with STEMI. A total of 427 STEMI patients undergoing primary percutaneous coronary intervention (PCI) were included in this study. The Tp-e/QT before PCI was measured by traditional 12-lead method and infarct-related-lead method. Outcomes were tested using comparative statistics, logistic regression, receiver operating characteristic (ROC) curve and Kaplan-Meier survival analysis. There were 62 (14.5%) patients who had MACEs in-hospital. Logistic regression showed that the Tp-e/QT in infarct-related-lead was an independent predictor (p < 0.001). The area under the ROC curve (AUC) of the Tp-e/QT in infarct-related-lead was larger than that in the Tp-e/QT in traditional 12-lead (0.889 vs 0.741), and the optimal cutoff value was 0.32. The three-year survival rate of patients in the infarct-related-lead Tp-e/QT < 0.32 group was better than Tp-e/QT ≥ 0.32 group in Kaplan-Meier survival analysis (93.9 vs 87.0%). When stratified according to infarct-related arteries, the results showed that the common odds ratio of patients in Tp-e/QT ≥ 0.32 group occurred MACEs was 1.562, P = 0.038. The infarct-related-lead Tp-e/QT performed better than the traditional 12-lead Tp-e/QT in predicting poor prognosis.
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Electrocardiographic differences in patients with true and pseudo-resistant hypertension. J Hum Hypertens 2021; 36:622-628. [PMID: 34131262 DOI: 10.1038/s41371-021-00559-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/20/2021] [Accepted: 05/28/2021] [Indexed: 11/09/2022]
Abstract
Cardiovascular disease is the leading cause of mortality in hypertensives, and patients with true resistant hypertension have an increased risk for premature cardiovascular events. Electrocardiography (ECG) has an essential role in the monitoring of hypertensive heart disease; however, little is known about the importance of ECG parameters in patients with resistant hypertension. We aimed to investigate whether fragmented QRS (fQRS) and frontal plane QRS-T angle, which are novel ECG parameters indicating myocardial damage, predict true resistant hypertension in patients with uncontrolled blood pressure. Four hundred six hypertensive patients with resistant hypertension were prospectively enrolled for the study. Patients were divided into two groups as 'true resistant' or 'pseudo-resistant' hypertensives and compared regarding the ECG parameters. While 73 (18%) patients had true resistant hypertension, 333 (82%) patients had pseudo-resistant hypertension. The frequency of fQRS (47.9% vs. 20.1%, p < 0.001) and average frontal plane QRS-T angle (93.0° ± 19.7° vs. 53.8° ± 10.2°, p < 0.001) were significantly higher in patients with true resistant hypertension compared to those with pseudo-resistant hypertension. Also, fQRS in anterior leads was significantly more frequent in patients with true resistant hypertension (57.1% vs. 23.8%, p < 0.001). Moreover, ROC curve analysis demonstrated that an increased frontal plane QRS-T angle > 90.75° predicted true resistant hypertension with a sensitivity 96% and specificity 61% (AUC:0.874, p < 0.001). Furthermore, multivariate analysis demonstrated that fQRS in anterior leads (OR: 1.251, 95% CI: 1.174-1.778, p = 0.002) and frontal plane QRS-T angle (OR: 1.388, 95% CI: 1.073-1.912, p < 0.001) were independent predictors of true resistant hypertension. In conclusion, fQRS and frontal plane QRS-T angle may be useful to predict true resistant hypertension in patients with uncontrolled blood pressure.
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Ösken A, Aydın E, Özcan KS, Yaylacı S. Evaluation of Electrocardiographic Parameters and the Presence of Interatrial Block in Patients with Mad Honey Intoxication. Cardiovasc Toxicol 2021; 21:772-780. [PMID: 34125412 DOI: 10.1007/s12012-021-09668-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/08/2021] [Indexed: 11/25/2022]
Abstract
Mad honey intoxication (MHI) is a food-induced clinical condition that usually presents with cardiovascular symptoms and can lead to life-threatening arrhythmias if not diagnosed and treated early. No data exist in the literature on the presence of interatrial block (IAB) after food intoxication. In our study, we sought to investigate atrioventricular electrocardiography (ECG) parameters and determine the frequency of IAB in patients with MHI. In total, 76 patients diagnosed with MHI were included in our retrospective study. Twelve-lead ECGs were performed and participants were divided into two groups according to the presence of IAB in the reference ECG. The P maximum (Pmax), P minimum (Pmin), P dispersion (Pdisp), T peak to T end (Tp-Te) interval and QT dispersion (QTdisp) values were compared between the two groups. IAB was detected in 28 (35.5%) of 76 MHI patients included in the final analysis. Pmax duration (122 ± 8; p < 0.001) and PD (69 ± 11; p < 0.001) were significantly higher in the IAB ( +) group. During regression analysis, Pmax [odds ratio (OR) 1.158, 95% confidence interval (CI) 1.036-1.294; p = 0.010] and Pd (OR 1.086, 95% CI 1.001-1.017; p = 0.046) were independently associated with IAB. Pmax and Pd area under the receiver operating characteristic curve values for IAB prediction were 0.926 (95% CI 0.841-1,000; p < 0.001) and 0.872 (95% CI 0.765-0.974; p < 0.001), respectively. ECG changes are common in patients presenting with MHI. These patients need to be followed up clinically in terms of progression to arrhythmic events that may occur in the future.
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Affiliation(s)
- Altuğ Ösken
- Department of Cardiology, Siyami Ersek Thoracic and Cardiovascular Surgery Center, Training and Research Hospital, Tibbiye street, No:13, Haydarpasa, Istanbul, Turkey.
| | - Ercan Aydın
- Department of Cardiology, Trabzon Vakfıkebir State Hospital, Trabzon, Turkey
| | - Kazım Serhan Özcan
- Department of Cardiology, Siyami Ersek Thoracic and Cardiovascular Surgery Center, Training and Research Hospital, Tibbiye street, No:13, Haydarpasa, Istanbul, Turkey
| | - Selçuk Yaylacı
- Department of Internal Medicine, Sakarya University Faculty of Medicine, Sakarya, Turkey
- Department of Internal Medicine, Fındıklı State Hospital, Rize, Turkey
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Ibisoglu E, Tekin DDN, Kızılırmak F, Güneş ST, Boyraz B, Özdenkaya Y, Çakal S, Çakal B, Savur Ü, Erdoğan A, Olgun FE, Güneş HM. Evaluation of Changes in Ventricular Repolarization Parameters in Morbidly Obese Patients Undergoing Bariatric Surgery. Obes Surg 2021; 31:3138-3143. [PMID: 33856635 DOI: 10.1007/s11695-021-05385-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/24/2021] [Accepted: 03/24/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND Weight loss after bariatric surgery has been associated with reduced cardiovascular mortality and overall mortality in obese patients. In this study, we aimed to analyze the changes between pre-operation and post-operation ventricular arrhythmia predictors in patients who underwent bariatric surgery. MATERIALS AND METHODS The study included 58 patients who underwent bariatric surgery. We measured QT max, QT min, QRS, JT, and Tp-e intervals, and we estimated Tp-e/QT max, Tp-e/QTc max, Tp-e/JT, Tp-e/JTc rates, QTc max, QTc min, cQTd, and JTc intervals both pre-op and 6 months post-op. RESULTS Heart rate, PR, QT max, QTc max, QTc min, cQTd, JTc, Tp-e, Tp-e/QT max, Tp-e/QTc max, Tp-e/JT, and Tp-e/JTc values, which were close to the upper limit in the pre-op period, showed statistically significant decreases at 6 months post-op. CONCLUSION The results of our study showed that bariatric surgery had positive effects on the regression of ventricular repolarization parameters and the possible development of ventricular arrhythmia.
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Affiliation(s)
- Ersin Ibisoglu
- Cardiology Department, Başakşehir Çam and Sakura City Hospital, Başakşehir Mahallesi G-434 Caddesi No: 2L, 34480 Başakşehir, İstanbul, Turkey.
| | - Deniz Dilan Naki Tekin
- Cardiology Department, Başakşehir Çam and Sakura City Hospital, Başakşehir Mahallesi G-434 Caddesi No: 2L, 34480 Başakşehir, İstanbul, Turkey
| | - Filiz Kızılırmak
- Cardiology Department, İstanbul Medipol University, İstanbul, Turkey
| | - Saime Turgut Güneş
- Radiology Department, İstanbul Training and Research Hospital, İstanbul, Turkey
| | | | - Yaşar Özdenkaya
- General Surgery Department, İstanbul Medipol University, İstanbul, Turkey
| | - Sinem Çakal
- İstanbul Haseki Training and Research Hospital, İstanbul, Turkey
| | - Beytullah Çakal
- Cardiology Department, İstanbul Medipol University, İstanbul, Turkey
| | - Ümeyir Savur
- İstanbul Gaziosmanpaşa Training and Research Hospital, İstanbul, Turkey
| | - Aslan Erdoğan
- Cardiology Department, Başakşehir Çam and Sakura City Hospital, Başakşehir Mahallesi G-434 Caddesi No: 2L, 34480 Başakşehir, İstanbul, Turkey
| | - Fatih Erkam Olgun
- Cardiology Department, İstanbul Medipol University, İstanbul, Turkey
| | - H Murat Güneş
- Cardiology Department, İstanbul Medipol University, İstanbul, Turkey
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Tp-Te interval prolongs in hypertension independent of the left ventricular geometry. JOURNAL OF SURGERY AND MEDICINE 2021. [DOI: 10.28982/josam.754891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Castro-Torres Y, Carmona-Puerta R, Chávez-González E, González-Rodríguez EF. Tpeak-Tend, Tpeak-Tend dispersion and Tpeak-Tend/QT in children and its relationship with clinical variables. Colomb Med (Cali) 2019; 50:252-260. [PMID: 32476691 PMCID: PMC7232943 DOI: 10.25100/cm.v50i4.4199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Aim To characterize the Tpeak-Tend, the Tpeak-Tend dispersion and Tpeak-Tend/QT in children and its relationship with clinical variables. Methods Cross-sectional study in 126 children between 9 and 12 years of the Camilo Cienfuegos School in Santa Clara, Cuba. Clinical and anthropometric variables were obtained to determine their relationship with electrocardiographic parameters: Tpeak-Tend V5, Tpeak-Tend dispersion and Tpeak-Tend/QT ratio V5. In addition, laboratory tests were conducted. Results Age and systolic blood pressure are associated with an increased probability of having values of Tpeak-Tend/QT V5 ≥75 percentile for both sexes (OR: 1.72, CI 95%: 1.02-2.91; p= 0.043), (OR: 1.08, CI 95%: 1.01-1.16; p= 0.017) respectively. The body mass index and systolic blood pressure are linearly and significantly correlated with the Tpeak-Tend/QT V5 (r= 0.224; p= 0.012) and (r= 0.220; p= 0.014) respectively. Conclusions The age of the patients and the systolic blood pressure figures are factors that increase the probability of having values of the Tpeak-Tend/QT V5 ≥75 percentile. There was a significant linear correlation between the Tpeak-Tend/QT V5 with the body mass index and the systolic blood pressure.
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Affiliation(s)
- Yaniel Castro-Torres
- Hospital Universitario Celestino Hernández Robau, Servicio de Cardiología. Santa Clara , Villa Clara. Cuba
| | - Raimundo Carmona-Puerta
- Cardiocentro Ernesto Che Guevara, Servicio de Electrofisiología y Estimulación Cardiaca. Santa Clara, Villa Clara. Cuba
| | - Elibet Chávez-González
- Cardiocentro Ernesto Che Guevara, Servicio de Electrofisiología y Estimulación Cardiaca. Santa Clara, Villa Clara. Cuba
| | - Emilio Francisco González-Rodríguez
- Universidad Central Marta Abreu de las Villas, Facultad de Ingeniería Eléctrica, Centro de Desarrollo Electrónico. Santa Clara, Villa Clara. Cuba
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Özbek SC, Sökmen E. Usefulness of Tp-Te interval and Tp-Te/QT ratio in the prediction of ventricular arrhythmias and mortality in acute STEMI patients undergoing fibrinolytic therapy. J Electrocardiol 2019; 56:100-105. [DOI: 10.1016/j.jelectrocard.2019.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 06/22/2019] [Accepted: 07/07/2019] [Indexed: 12/20/2022]
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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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Sökmen E, Çalışkan HM, Çelik M, Sivri S, Boduroğlu Y, Özbek SC. The Effect of Lower and Higher Calorie Meal on the Parameters of Ventricular Repolarization in Healthy Subjects. Open Access Maced J Med Sci 2019; 7:329-335. [PMID: 30833996 PMCID: PMC6390140 DOI: 10.3889/oamjms.2019.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/12/2018] [Accepted: 10/13/2018] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND: Cardiovascular modulation following meal consumption has been known. Little and conflicting data is present regarding electrocardiographic QT and QTc intervals after a meal, and status of ventricular repolarization following meal is not known comprehensively. AIM: To inquire the electrocardiographic status of ventricular repolarisation thoroughly after lower and higher calorie meal consumption in a comparative manner. METHODS: A group of 61 healthy individuals were studied before and after lunch. They were divided into two groups according to the calorie consumed (higher calorie and lower calorie; median 1580 and 900 kcals, respectively). Calorie consumed was estimated using dietary guidelines. Data was collected from 12-lead ECG both in a fasted state and 2nd postprandial hour for each participant. Parameters of ventricular repolarization, namely, JTp, Tp-e, QT, QTc intervals and their ratios, as well as RR intervals, were compared between fasted and postprandial states for every participant. RESULTS: Tp-e and QTc intervals, and Tp-e/QTc ratio do not significantly change after both higher- and lower-calorie meals. JTp and QT intervals significantly shorten in both groups, regardless of the calorie consumed. While JTp shows a positive correlation with RR interval both before and after a meal in lower calorie intake group, no correlation was found with RR interval after a meal in higher calorie group. Logistic regression analysis revealed that higher calorie intake during a meal is a predictor for greater shortening in JTp and QT, compared to lower calorie meal. CONCLUSION: Our study may guide future studies on ventricular repolarisation, particularly those conducted on various disease conditions or drug effect of cardiac electrophysiology.
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Affiliation(s)
- Erdoğan Sökmen
- Kirsehir Ahi Evran Education and Research Hospital, Department of Cardiology, Ahi Evran University, Kirsehir, Turkey
| | - Hacı Mehmet Çalışkan
- Kirsehir Ahi Evran Education and Research Hospital, Department of Emergency Medicine, Ahi Evran University, Kirsehir, Turkey
| | - Mustafa Çelik
- Kirsehir Ahi Evran Education and Research Hospital, Department of Cardiology, Ahi Evran University, Kirsehir, Turkey
| | - Serkan Sivri
- Kirsehir Ahi Evran Education and Research Hospital, Department of Cardiology, Ahi Evran University, Kirsehir, Turkey
| | - Yalçın Boduroğlu
- Kirsehir Ahi Evran Education and Research Hospital, Department of Cardiology, Ahi Evran University, Kirsehir, Turkey
| | - Sinan Cemgil Özbek
- Kirsehir Ahi Evran Education and Research Hospital, Department of Cardiology, Ahi Evran University, Kirsehir, Turkey
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Cekirdekci EI, Bugan B. Can abnormal dispersion of ventricular repolarization be a predictor of mortality in arrhythmogenic right ventricular cardiomyopathy: The importance of Tp-e interval. Ann Noninvasive Electrocardiol 2018; 24:e12619. [PMID: 30412321 DOI: 10.1111/anec.12619] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/12/2018] [Accepted: 10/13/2018] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy characterized by ventricular arrhythmias and specific ventricular pathology. Repolarization abnormalities, the significant contributor to life-threatening arrhythmias and mortality, are frequently observed ECG changes in patients with ARVC. This study aimed to evaluate the changes in Tp-e interval, Tp-e/QT, Tp-e/QTc ratio, and traditional electrocardiographic features of electrical dispersion in patients with ARVC. METHODS A total of 105 participants were enrolled in the current study. The ARVC group consisted of 40 subjects (30 men, with a median of 35 (26-41) years), and the control group included of 65 age and sex-matched individuals (42 men, with a median of 37 (24-45) years). The Tp-e interval, Tp-e/QT ratio, and Tp-e/QTc ratio were measured by the 12-lead electrocardiogram. RESULTS Tp-e interval, cTp-e interval, Tp-e/QT, and Tp-e/QTc ratio were significantly higher in ARVC patients compared to the control group (all p < 0.001). Tp-e interval, cTp-e interval, Tp-e/QT ratio, and Tp-e/QTc ratio were significantly increased in deceased ARVC patients compared to the survival group (p = 0.038, p < 0.001, p = 0.006, p = 0.032, respectively). In the multivariate analysis, RV-FAC and cTp-e interval level (p < 0.05 for each parameter) were associated with all-cause mortality [odds ratio 1.747 95% CI (1.012-3.018); p = 0.045 and odds ratio 1.166, 95% CI (1.017-1.336); p = 0.027, respectively]. CONCLUSION Tp-e interval, cTp-e interval, Tp-e/QT ratio, and Tp-e/QTc ratio were prolonged in patients with NC. We revealed that abnormal dispersion of ventricular repolarization suggests the increased risk of mortality in ARVC.
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Affiliation(s)
- Elif Ijlal Cekirdekci
- Department of Cardiology, Dr. Suat Gunsel University of Kyrenia Hospital, Kyrenia, Mersin, Turkey
| | - Barış Bugan
- Department of Cardiology, Dr. Suat Gunsel University of Kyrenia Hospital, Kyrenia, Mersin, Turkey
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Evaluation of Tp-e interval, Tp-e/QT and Tp-e/QTc ratio in aortic valve stenosis before and after transcatheter aortic valve implantation. J Electrocardiol 2018; 51:949-954. [DOI: 10.1016/j.jelectrocard.2018.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 08/05/2018] [Accepted: 08/07/2018] [Indexed: 11/20/2022]
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15
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Sökmen E, Özbek SC, Çelik M, Sivri S, Metin M, Avcu M. Changes in the parameters of ventricular repolarization during preapnea, apnea, and postapnea periods in patients with obstructive sleep apnea. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2018; 41:762-766. [DOI: 10.1111/pace.13365] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 04/11/2018] [Accepted: 04/24/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Erdoğan Sökmen
- Department of CardiologyAhi Evran University Training and Research Hospital Kirsehir Turkey
| | - Sinan Cemgil Özbek
- Department of CardiologyAhi Evran University Training and Research Hospital Kirsehir Turkey
| | - Mustafa Çelik
- Department of CardiologyAhi Evran University Training and Research Hospital Kirsehir Turkey
| | - Serkan Sivri
- Department of CardiologyAhi Evran University Training and Research Hospital Kirsehir Turkey
| | - Mehmet Metin
- Department OtorhinolaryngologyAhi Evran University Training and Research Hospital Kirsehir Turkey
| | - Mustafa Avcu
- Department OtorhinolaryngologyAhi Evran University Training and Research Hospital Kirsehir Turkey
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16
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Al-Nimer MSM, Hussein II. Subclinical ventricular repolarization abnormality in uncontrolled compared with controlled treated hypertension. Indian Heart J 2017; 69:136-140. [PMID: 28460758 PMCID: PMC5414943 DOI: 10.1016/j.ihj.2016.07.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 01/28/2016] [Accepted: 07/27/2016] [Indexed: 11/27/2022] Open
Abstract
Background Antihypertensive medications have variable effects on the duration of the QT interval. This study aims to demonstrate the subclinical ventricular conduction defect in treating hypertensive patients taking in consideration the status of the blood pressure control with the antihypertensive agents. Methods This cross-section study was performed at the Departments of Physiology and Pharmacology, College of Medicine, Al-Mustansiriya University, Baghdad, Iraq. A total number of 97 hypertensive patients (30 males and 67 females) were eligible to enroll in the study. The patients were grouped into controlled hypertension (Group I) and uncontrolled hypertension (Group II). Each participant is subjected to the electrocardiograph (ECG) investigation. A QT nomogram plot used to identify the patients who are vulnerable or at risk of developing cardiac arrhythmias. Results There were no significant differences in the values of the electrocardiogram determinants between Group I and Group II. Abnormal prolonged QTcB interval observed in 18 out of 80 (22.5%) patients of Group II compared with 4 out of 17. The JT index value of ≥112 was observed in 20 out of 80 (25%) patients of Group II compared with 6 out of 17 (35.3%) patients of Group I. A significant correlation between the QTcB duration with JT index observed in both Groups I and II. Conclusion Patients with hypertension have variability in ventricular repolarization (QTcB and JT) irrespective of their blood pressure control putting them at higher risk of cardiac arrhythmias.
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Affiliation(s)
- Marwan S M Al-Nimer
- Department of Pharmacology, College of Medicine, Al-Mustansiriya University, Baghdad, Iraq.
| | - Ismail I Hussein
- Department of Physiology, College of Medicine, Al-Mustansiriya University, Baghdad, Iraq
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Dilaveris P, Antoniou CK, Gatzoulis K, Tousoulis D. T wave axis deviation and QRS-T angle - Controversial indicators of incident coronary heart events. J Electrocardiol 2017; 50:466-475. [PMID: 28262257 DOI: 10.1016/j.jelectrocard.2017.02.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Indexed: 11/29/2022]
Abstract
Abnormal orientation of the T-wave axis and increased angle between the QRS complex (depolarization) and the T-wave (repolarization) have long been assumed to provide a global measure of repolarization abnormality, and have been used to assess ventricular repolarization. The ability of the T wave axis deviation and the QRS-T angle to predict incident coronary heart events was examined in several studies. However, conflicting results have led to significant controversy in the literature concerning their purported ability. Potential explanations involve true variation between study populations, non-standardized cut-off values, different baseline cardiovascular risk levels or different patterns of confounding by other concomitant cardiovascular risk factors. In the present article we will attempt to briefly present the rationale and pathophysiology behind these indices, summarize existing knowledge regarding their prognostic significance and their correlation with established cardiovascular disease risk factors. Further prospective studies are necessary to confirm or refute whether T-wave axis deviation, QRS-T angle and ventricular gradient may in the future serve as indicators of incident coronary heart events and mortality, both in populations with higher prevalence of subclinical advanced atherosclerotic heart disease and in apparently healthy subjects.
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Affiliation(s)
- Polychronis Dilaveris
- First Department of Cardiology, University of Athens Medical School, Hippokration Hospital, Athens, Greece.
| | | | - Konstantinos Gatzoulis
- First Department of Cardiology, University of Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Dimitrios Tousoulis
- First Department of Cardiology, University of Athens Medical School, Hippokration Hospital, Athens, Greece
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18
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Gazi E, Gencer M, Temiz A, Barutcu A, Altun B, Gungor ANC, Hacivelioglu S, Uysal A, Cosar E. Does pregnancy-induced hypertension affect the electrophysiology of the heart? J OBSTET GYNAECOL 2015; 36:183-6. [PMID: 26366512 DOI: 10.3109/01443615.2015.1036401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Pregnancy-induced hypertension (PIHT) increases both maternal and neonatal mortality and morbidity in pregnant women. We sought to investigate the electrocardiographic findings in pregnant women with PIHT. Seventeen pregnant women (29.4 ± 5 years) with PIHT and 24 pregnant women (27.3 ± 6.1 years) with normal blood pressure (control group) were included in the study. A 12-lead surface electrocardiogram was used to evaluate the electrocardiographic parameters. Pregnant women with PIHT had higher blood pressure (p = 0.001). The Tp-e interval was longer in PIHT pregnant women at 83.5 ± 7.8 ms versus 75.8 ± 8.4 ms in the control group (p = 0.007). The Tp-e/QTc ratio was higher in pregnant women with PIHT than that in healthy controls (0.19 ± 0.02 vs. 0.18 ± 0.02, respectively). This study demonstrated that Pd, QTd and the P wave durations were similar in the PIHT pregnant women and control group, but the Tp-e and Tp-e/QTc ratio were higher in pregnant women with PIHT than in normotensive pregnant women.
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Affiliation(s)
- E Gazi
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - M Gencer
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Temiz
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Barutcu
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - B Altun
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A N C Gungor
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - S Hacivelioglu
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Uysal
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - E Cosar
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
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19
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Castro-Torres Y, Carmona-Puerta R, Katholi RE. Ventricular repolarization markers for predicting malignant arrhythmias in clinical practice. World J Clin Cases 2015; 3:705-720. [PMID: 26301231 PMCID: PMC4539410 DOI: 10.12998/wjcc.v3.i8.705] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 02/22/2015] [Accepted: 06/08/2015] [Indexed: 02/05/2023] Open
Abstract
Malignant cardiac arrhythmias which result in sudden cardiac death may be present in individuals apparently healthy or be associated with other medical conditions. The way to predict their appearance represents a challenge for the medical community due to the tragic outcomes in most cases. In the last two decades some ventricular repolarization (VR) markers have been found to be useful to predict malignant cardiac arrhythmias in several clinical conditions. The corrected QT, QT dispersion, Tpeak-Tend, Tpeak-Tend dispersion and Tp-e/QT have been studied and implemented in clinical practice for this purpose. These markers are obtained from 12 lead surface electrocardiogram. In this review we discuss how these markers have demonstrated to be effective to predict malignant arrhythmias in medical conditions such as long and short QT syndromes, Brugada syndrome, early repolarization syndrome, acute myocardial ischemia, heart failure, hypertension, diabetes mellitus, obesity and highly trained athletes. Also the main pathophysiological mechanisms that explain the arrhythmogenic predisposition in these diseases and the basis for the VR markers are discussed. However, the same results have not been found in all conditions. Further studies are needed to reach a global consensus in order to incorporate these VR parameters in risk stratification of these patients.
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20
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Yayla Ç, Bilgin M, Akboğa MK, Gayretli Yayla K, Canpolat U, Dinç Asarcikli L, Doğan M, Turak O, Çay S, Özeke Ö, Akyel A, Yeter E, Aydoğdu S. Evaluation of Tp-E Interval and Tp-E/QT Ratio in Patients with Aortic Stenosis. Ann Noninvasive Electrocardiol 2015; 21:287-93. [PMID: 26246339 DOI: 10.1111/anec.12298] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The risk of syncope and sudden cardiac death due to ventricular arrhythmias increased in patients with aortic stenosis (AS). Recently, it was shown that Tp-e interval, Tp-e/QT, and Tp-e/QTc ratio can be novel indicators for prediction of ventricular arrhythmias and mortality. We aimed to investigate the association between AS and ventricular repolarization using Tp-e interval and Tp-e/QT ratio. METHODS Totally, 105 patients with AS and 60 control subjects were enrolled to this study. The severity of AS was defined by transthoracic echocardiographic examination. Tp-e interval, Tp-e/QT, and Tp-e/QTc ratios were measured from the 12-lead electrocardiogram. RESULTS Tp-e interval, Tp-e/QT, and Tp-e/QTc ratios were significantly increased in parallel to the severity of AS (P < 0.001, P = 0.001, and P = 0.001, respectively). Also, it was shown that Tp-e/QTc ratio had significant positive correlation with mean aortic gradient (r = 0.192, P = 0.049). In multivariate logistic regression analysis, Tp-e/QTc ratio and left ventricular mass were found to be independent predictors of severe AS (P = 0.03 and P = 0.04, respectively). CONCLUSIONS Our study showed that Tp-e interval, Tp-e/QT, and Tp-e/QTc ratios were increased in patients with severe AS. Tp-e/QTc ratio and left ventricular mass were found as independent predictors of severe AS.
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Affiliation(s)
- Çağrı Yayla
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Murat Bilgin
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Mehmet Kadri Akboğa
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Kadriye Gayretli Yayla
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Uğur Canpolat
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Lale Dinç Asarcikli
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Mehmet Doğan
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Osman Turak
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Serkan Çay
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Özcan Özeke
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Ahmet Akyel
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Ekrem Yeter
- Dışkapı Yıldırım Beyazıt Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
| | - Sinan Aydoğdu
- Türkiye Yüksek Ihtisas Training and Research Hospital, Cardiology Clinic, Ankara, Turkey
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Hetland M, Haugaa KH, Sarvari SI, Erikssen G, Kongsgaard E, Edvardsen T. A novel ECG-index for prediction of ventricular arrhythmias in patients after myocardial infarction. Ann Noninvasive Electrocardiol 2014; 19:330-7. [PMID: 24612066 DOI: 10.1111/anec.12152] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Risk prediction of ventricular arrhythmias after myocardial infarction (MI) is still insufficient. Prolonged QTc is a known risk marker of mortality and ventricular arrhythmias. QTc has not achieved clinical importance in predicting arrhythmic events in patients after MI. Recent studies have displayed that the terminal part of the QT-interval, Tpeak to Tend (TpTe), may be a more promising predictor of adverse outcome. Herein, we assessed whether TpTe may serve as a predictor of ventricular arrhythmias in patients with previous MI fulfilling current implantable cardioverter-defibrillator (ICD) indications. METHODS Seventy-six patients with previous MI eligible for ICD therapy were prospectively enrolled. ECG measurements at baseline were recorded using a 12-lead ECG with 50 mm/s paper speed. TpTe was measured from peak of the T wave to end of T wave. Events during follow up were defined as ventricular arrhythmias requiring appropriate ICD therapy, including antitachycardia pacing and shock. RESULTS During 23 ± 19 months, arrhythmic events occurred in 36 (47%) patients. TpTe was longer in ICD patients with recorded ventricular arrhythmias compared with those without (116 ± 26 ms vs. 102 ± 20 ms; P = 0.01), whereas ejection fraction (EF) at baseline did not differ (35 ± 9% vs. 35 ± 11%; P = 0.87). TpTe was an independent predictor of ventricular arrhythmias when adjusted for age, EF and QRS duration (HR 1.16; 95% CI 1.03-1.31; P = 0.02). CONCLUSIONS TpTe predicted malignant arrhythmias in patients after MI independently of EF. TpTe may contribute in the risk stratification of patients to identify post-MI patients disposed to malignant arrhythmias and their need of ICD therapy.
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de Souza F, Muxfeldt ES, Salles GF. Prognostic factors in resistant hypertension: implications for cardiovascular risk stratification and therapeutic management. Expert Rev Cardiovasc Ther 2013; 10:735-45. [PMID: 22894630 DOI: 10.1586/erc.12.58] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Resistant hypertension (RH) is defined as uncontrolled office blood pressure (BP) in spite of the use of at least three antihypertensive medications. Although its condition has a high prevalence, it is still understudied, and its prognosis is not well established. Some prospective studies evaluated the prognostic value of ambulatory BP monitoring, ECG and renal parameters. They pointed out that ambulatory BPs are important predictors of cardiovascular morbidity and mortality, whereas office BP has no prognostic value. The diagnosis of true RH and the nondipping pattern are also valuable predictors of cardiovascular outcomes. Moreover, several ECG (prolonged ventricular repolarization, serial changes in the strain pattern and left ventricular hypertrophy) and renal parameters (albuminuria and reduced glomerular filtration rate) are also powerful cardiovascular risk markers in RH. These markers and others yet unexplored, such as arterial stiffness and serum biomarkers, may improve cardiovascular risk stratification in these very high-risk patients.
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Affiliation(s)
- Fabio de Souza
- Internal Medicine Department, University Hospital Clementino Fraga Filho, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Erikssen G, Liestøl K, Gullestad L, Haugaa KH, Bendz B, Amlie JP. The terminal part of the QT interval (T peak to T end): a predictor of mortality after acute myocardial infarction. Ann Noninvasive Electrocardiol 2012; 17:85-94. [PMID: 22537325 DOI: 10.1111/j.1542-474x.2012.00493.x] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The terminal part of the QT interval (T peak to T end; Tp-e)-an index for dispersion of cardiac repolarization-is often prolonged in patients experiencing malignant ventricular arrhythmias after acute myocardial infarction (AMI). We wanted to explore whether high Tp-e might predict mortality or fatal arrhythmia post-AMI. METHODS Tp-e was measured prospectively in 1359/1384 (98.2%) consecutive patients with ST elevation (n = 525) or non-ST elevation (n = 859) myocardial infarction (STEMI or NSTEMI) admitted for coronary angiography. RESULTS Tp-e was significantly correlated with age, heart rate (HR), heart failure, LVEF, creatinine, three-vessel disease, previous AMI and QRS and QT duration. During a mean follow-up of 1.3 years (range 0.4-2.3),109 patients (7.9%) died; 25, 45, and 39 from cardiac arrhythmia, nonarrhythmic cardiac causes and other causes, respectively. Long Tp-e was strongly associated with increased risk of death, and Tp-e remained a significant predictor of death in multivariable Cox analyses (RR 1.5, 95% CI[1.3-1.7]). HR-corrected Tp-e (cTp-e) was the strongest predictor of death (RR 1.6 [1.4-1.9]). Tp-e and cTp-e were particularly strong predictors of fatal cardiac arrhythmia (RR 1.6 [1.2-2.1] and RR 1.8 [1.4-2.4]). Findings were similar in STEMI and NSTEMI. When comparing two methods for measuring Tp-e, one including the tail of the T wave and one not, the former had markedly higher predictive power (P < 0.001). CONCLUSION Tp-e, and in particular cTp-e, were strong predictors of mortality during the first year post-AMI, and should be further evaluated as prognostic factors additional to established post-AMI risk factors.
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Affiliation(s)
- Gunnar Erikssen
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Norway.
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A common variant near the KCNJ2 gene is associated with T-peak to T-end interval. Heart Rhythm 2012; 9:1099-103. [PMID: 22342860 DOI: 10.1016/j.hrthm.2012.02.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Indexed: 11/21/2022]
Abstract
BACKGROUND T-peak to T-end (TPE) interval on the electrocardiogram is a measure of myocardial dispersion of repolarization and is associated with an increased risk of ventricular arrhythmias. The genetic factors affecting the TPE interval are largely unknown. OBJECTIVE To identify common genetic variants that affect the duration of the TPE interval in the general population. METHODS We performed a genome-wide association study on 1870 individuals of Finnish origin participating in the Health 2000 Study. The TPE interval was measured from T-peak to T-wave end in leads II, V(2), and V(5) on resting electrocardiograms, and the mean of these TPE intervals was adjusted for age, sex, and Cornell voltage-duration product. We sought replication for a genome-wide significant result in the 3745 subjects from the Framingham Heart Study. RESULTS We identified a locus on 17q24 that was associated with the TPE interval. The minor allele of the common variant rs7219669 was associated with a 1.8-ms shortening of the TPE interval (P = 1.1 × 10(-10)). The association was replicated in the Framingham Heart Study (-1.5 ms; P = 1.3 × 10(-4)). The overall effect estimate of rs7219669 in the 2 studies was -1.7 ms (P = 5.7 × 10(-14)). The common variant rs7219669 maps downstream of the KCNJ2 gene, in which rare mutations cause congenital long and short QT syndromes. CONCLUSION The common variant rs7219669 is associated with the TPE interval and is thus a candidate to modify repolarization-related arrhythmia susceptibility in individuals carrying the major allele of this polymorphism.
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Zhao Z, Yuan Z, Ji Y, Wu Y, Qi Y. Left ventricular hypertrophy amplifies the QT, and Tp-e intervals and the Tp-e/ QT ratio of left chest ECG. J Biomed Res 2010; 24:69-72. [PMID: 23554614 PMCID: PMC3596538 DOI: 10.1016/s1674-8301(10)60011-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE To evaluate the changes in Tp-e interval (an interval from the peak to the end of the T wave), QT interval and Tp-e/QT ratio of the body surface ECG in patients with left ventricular hypertrophy (LVH). METHODS The Tp-e interval and QT interval were measured on body surface ECGs in 42 patients without either hypertension or LVH (control group), 41 patients having hypertension but not LVH (non-LVH group), and 38 patients with both hypertension and LVH (LVH group). RESULTS The mean corrected QT (QTc) interval, and mean corrected Tp-e[T(p-e)c] interval were significantly longer in the LVH group (0.430±0.021s vs. 0.409±0.019s, p < 0.01; 0.098±0.013s vs. 0.088±0.011s, respectively) than those in the control group. The Tp-e/QT ratio was also amplified in LVH group (0.232±0.028 vs.0.218±0.027) (p < 0.05). CONCLUSION LVH increased the QT interval, Tp-e interval and Tp-e/QT ratio of the body surface ECG.
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Affiliation(s)
| | - Zuyi Yuan
- Department of Cardiology, Key Laboratory of Environmental Genes Related to Diseases, Ministry of Education, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an 710061, China.
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Prognostic value of ventricular repolarization prolongation in resistant hypertension: a prospective cohort study. J Hypertens 2009; 27:1094-101. [PMID: 19390353 DOI: 10.1097/hjh.0b013e32832720b3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
OBJECTIVE The prognostic value of prolonged ventricular repolarization in patients with resistant hypertension is unknown. The aim of this prospective study was to investigate the usefulness of electrocardiographic QT-interval parameters as predictors of cardiovascular morbidity and mortality. METHODS At baseline, 538 resistant hypertensive patients had five QT-interval components measured in standard 12-lead ECGs: maximum QRS, QTpeak, QTend, JT and Tpeak-to-end-interval durations. Primary endpoints were a composite of fatal and nonfatal cardiovascular events, all-cause and cardiovascular mortalities. Multiple Cox regression assessed the associations between QT-interval parameters and subsequent endpoints. RESULTS After a median follow-up of 4.8 years, 69 (12.8%) patients died, 46 from cardiovascular causes, and 107 (19.9%) fatal or nonfatal cardiovascular events occurred. After adjustment for several traditional risk factors, including 24-h ambulatory systolic blood pressure, an increment of 1 SD (35 ms) in QTcend-interval was associated with hazard ratios of 1.38 (1.15-1.67), 1.51 (1.16-1.98) and 1.30 (1.03-1.64), respectively, for the composite endpoint, cardiovascular mortality and all-cause mortality. Further adjustment for left ventricular hypertrophy attenuated the relative risks, but they remained significant for cardiovascular mortality (1.45, 1.07-1.97) and for the composite endpoint (1.35, 1.11-1.66). After full adjustment, a prolonged QTcend-interval (> or =460 ms) conferred a 1.7-fold (1.1-2.6) higher risk of having a future fatal or nonfatal cardiovascular event. No other QT-interval component added further prognostic information to QTcend-interval duration. CONCLUSIONS Prolonged ventricular repolarization is a risk marker for cardiovascular morbidity and mortality in patients with resistant hypertension, over and beyond traditional cardiovascular risk factors, including ambulatory blood pressure and left ventricular hypertrophy.
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Ventricular repolarization in hypertension: beyond Bazett. Am J Hypertens 2008; 21:9. [PMID: 18091736 DOI: 10.1038/ajh.2007.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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