Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence
Introduction: There is a growing number of patients with implantable cardioverter-defibrillators. Recurrences are frequent and electrical shocks are the main factor affecting the quality of life. Objective: To identify the electrocardiographic predictors of the recurrence of malignant ventricular ar...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Cardiocentro Ernesto Che Guevara
2017-02-01
|
| Series: | CorSalud |
| Online Access: | http://www.revcorsalud.sld.cu/index.php/cors/article/view/180 |
| _version_ | 1818498540057395200 |
|---|---|
| author | Ailema A. Alemán-Fernández Margarita Dorantes-Sánchez Jesús Castro Hevia Lisbeth González González Yoel Coto Hernández Marcos A. Rodríguez García |
| author_facet | Ailema A. Alemán-Fernández Margarita Dorantes-Sánchez Jesús Castro Hevia Lisbeth González González Yoel Coto Hernández Marcos A. Rodríguez García |
| author_sort | Ailema A. Alemán-Fernández |
| collection | DOAJ |
| description | Introduction: There is a growing number of patients with implantable cardioverter-defibrillators. Recurrences are frequent and electrical shocks are the main factor affecting the quality of life.
Objective: To identify the electrocardiographic predictors of the recurrence of malignant ventricular arrhythmias in these patients.
Method: From a universe of 76 patients, who had undergone cardioverter-defibrillator implantation, 46 patients were selected and two groups were formed. Group A consisted of 27 patients with at least one episode of malignant ventricular arrhythmias after device implantation; and group B consisted of 19 subjects without recurrences. Measurements (prolonged QTc, abnormal QT dispersion, Tpeak-Tend interval and its abnormal dispersion) were averaged over three consecutive heartbeats in each lead, manually, by two independent observers.
Results: In group A, there was a predominance of structural heart disease and an ejection fraction less than 35%. The fragmentation of the QRS complex, bimodal T wave and early repolarization pattern were also present. There were significant differences in the mean values of the QT interval (428 vs. 390 ms), p=0.004; the corrected QT (476 vs. 436 ms), p=0.011; and Tpeak-Tend interval (108 vs. 87 ms), p=0.006. There were no significant differences in QT dispersion (51 vs. 48 ms), the Tpeak-Tend dispersion (35 vs. 27 ms), or QRS duration (121 vs. 105 ms).
Conclusions: QT, QTc and Tpeak-Tend intervals are electrocardiographic predictors of the recurrence of ventricular arrhythmias in patients with implantable cardioverter-defibrillators. |
| first_indexed | 2024-12-10T20:17:01Z |
| format | Article |
| id | doaj.art-ac2b9fcb64464f8ebe32edef6fc8d514 |
| institution | Directory Open Access Journal |
| issn | 2078-7170 |
| language | English |
| last_indexed | 2024-12-10T20:17:01Z |
| publishDate | 2017-02-01 |
| publisher | Cardiocentro Ernesto Che Guevara |
| record_format | Article |
| series | CorSalud |
| spelling | doaj.art-ac2b9fcb64464f8ebe32edef6fc8d5142022-12-22T01:35:10ZengCardiocentro Ernesto Che GuevaraCorSalud2078-71702017-02-01616369176Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrenceAilema A. Alemán-FernándezMargarita Dorantes-SánchezJesús Castro HeviaLisbeth González GonzálezYoel Coto HernándezMarcos A. Rodríguez GarcíaIntroduction: There is a growing number of patients with implantable cardioverter-defibrillators. Recurrences are frequent and electrical shocks are the main factor affecting the quality of life. Objective: To identify the electrocardiographic predictors of the recurrence of malignant ventricular arrhythmias in these patients. Method: From a universe of 76 patients, who had undergone cardioverter-defibrillator implantation, 46 patients were selected and two groups were formed. Group A consisted of 27 patients with at least one episode of malignant ventricular arrhythmias after device implantation; and group B consisted of 19 subjects without recurrences. Measurements (prolonged QTc, abnormal QT dispersion, Tpeak-Tend interval and its abnormal dispersion) were averaged over three consecutive heartbeats in each lead, manually, by two independent observers. Results: In group A, there was a predominance of structural heart disease and an ejection fraction less than 35%. The fragmentation of the QRS complex, bimodal T wave and early repolarization pattern were also present. There were significant differences in the mean values of the QT interval (428 vs. 390 ms), p=0.004; the corrected QT (476 vs. 436 ms), p=0.011; and Tpeak-Tend interval (108 vs. 87 ms), p=0.006. There were no significant differences in QT dispersion (51 vs. 48 ms), the Tpeak-Tend dispersion (35 vs. 27 ms), or QRS duration (121 vs. 105 ms). Conclusions: QT, QTc and Tpeak-Tend intervals are electrocardiographic predictors of the recurrence of ventricular arrhythmias in patients with implantable cardioverter-defibrillators.http://www.revcorsalud.sld.cu/index.php/cors/article/view/180 |
| spellingShingle | Ailema A. Alemán-Fernández Margarita Dorantes-Sánchez Jesús Castro Hevia Lisbeth González González Yoel Coto Hernández Marcos A. Rodríguez García Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence CorSalud |
| title | Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence |
| title_full | Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence |
| title_fullStr | Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence |
| title_full_unstemmed | Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence |
| title_short | Malignant ventricular arrhythmias in patients with implantable cardioverter-defibrillators: electrical signals which are predictors of recurrence |
| title_sort | malignant ventricular arrhythmias in patients with implantable cardioverter defibrillators electrical signals which are predictors of recurrence |
| url | http://www.revcorsalud.sld.cu/index.php/cors/article/view/180 |
| work_keys_str_mv | AT ailemaaalemanfernandez malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence AT margaritadorantessanchez malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence AT jesuscastrohevia malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence AT lisbethgonzalezgonzalez malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence AT yoelcotohernandez malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence AT marcosarodriguezgarcia malignantventriculararrhythmiasinpatientswithimplantablecardioverterdefibrillatorselectricalsignalswhicharepredictorsofrecurrence |