Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes
Background: In heart failure, there are structural and electric changes that affect the long term prognosis. While structural remodeling could be reversed by cardiac resynchronization therapy (CRT), little is known regarding reverse electric remodeling and its relation to the response to CRT. Object...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2014-12-01
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| Series: | The Egyptian Heart Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110260813002056 |
| _version_ | 1811313661683171328 |
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| author | Osama Diab Hebat-Allah A. Lotfy Said Khalid |
| author_facet | Osama Diab Hebat-Allah A. Lotfy Said Khalid |
| author_sort | Osama Diab |
| collection | DOAJ |
| description | Background: In heart failure, there are structural and electric changes that affect the long term prognosis. While structural remodeling could be reversed by cardiac resynchronization therapy (CRT), little is known regarding reverse electric remodeling and its relation to the response to CRT.
Objectives: To study the electric changes following CRT and their relation to patients’ response.
Methods: Thirty patients with implanted CRT device were included. Echocardiograms and surface electrocardiograms (ECGs) done before CRT were retrospectively analyzed. At the time of enrollment, echocardiography and ECG (during setting the CRT to off mode) were done. QRS duration (QRSD), QT interval, QTc interval, QT dispersion (QTd), and T wave peak to end (TPE) interval were measured.
Results: Mean time since implantation was 15.26 ± 6 months. QRSD decreased from 146.33 ± 16.29 to 134.33 ± 17.15 ms (p < 0.001). QT interval decreased from 420.33 ± 28.46 to 398.66 ± 21.29 ms (p < 0.001). QTc interval decreased from 505.66 ± 45.53 to 475.23 ± 31.08 ms (p < 0.001). QTd decreased from 58 ± 13.23 to 34.66 ± 13.82 ms (p < 0.001). TPE interval decreased from 124 ± 24.3 to 102 ± 22.5 ms (p < 0.001). Responders to CRT (19 patients, 63.3%) had larger ΔQRSD, ΔQTd, and ΔTPE than non responders (p = 0.002, 0.002, and 0.004, respectively). Cutoff values of −20 ms for each of ΔQRSD, ΔQTd, and ΔTPE could predict response to CRT with odds ratio (95% CI) of 4.05 (1.12–14.6), 2.75 (1.25–6), and 4.43 (1.21–15.5), respectively.
Conclusions: CRT induced reverse electric remodeling affecting both depolarization and repolarization parameters on surface ECG. Reverse electric remodeling was associated with favorable clinical and echocardiographic outcomes. |
| first_indexed | 2024-04-13T10:58:45Z |
| format | Article |
| id | doaj.art-50209160725b4d3eb3357074cf3d16bd |
| institution | Directory Open Access Journal |
| issn | 1110-2608 |
| language | English |
| last_indexed | 2024-04-13T10:58:45Z |
| publishDate | 2014-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | The Egyptian Heart Journal |
| spelling | doaj.art-50209160725b4d3eb3357074cf3d16bd2022-12-22T02:49:28ZengSpringerOpenThe Egyptian Heart Journal1110-26082014-12-0166434335010.1016/j.ehj.2013.12.085Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomesOsama Diab0Hebat-Allah A. Lotfy1Said Khalid2Department of Cardiology, Ain Shams University Hospital, Ain Shams University, 14, Mostafa Helmy St., Heliopolis, Cairo, EgyptNational Heart Institute, Cairo, EgyptDepartment of Cardiology, Ain Shams University Hospital, Ain Shams University, Cairo, EgyptBackground: In heart failure, there are structural and electric changes that affect the long term prognosis. While structural remodeling could be reversed by cardiac resynchronization therapy (CRT), little is known regarding reverse electric remodeling and its relation to the response to CRT. Objectives: To study the electric changes following CRT and their relation to patients’ response. Methods: Thirty patients with implanted CRT device were included. Echocardiograms and surface electrocardiograms (ECGs) done before CRT were retrospectively analyzed. At the time of enrollment, echocardiography and ECG (during setting the CRT to off mode) were done. QRS duration (QRSD), QT interval, QTc interval, QT dispersion (QTd), and T wave peak to end (TPE) interval were measured. Results: Mean time since implantation was 15.26 ± 6 months. QRSD decreased from 146.33 ± 16.29 to 134.33 ± 17.15 ms (p < 0.001). QT interval decreased from 420.33 ± 28.46 to 398.66 ± 21.29 ms (p < 0.001). QTc interval decreased from 505.66 ± 45.53 to 475.23 ± 31.08 ms (p < 0.001). QTd decreased from 58 ± 13.23 to 34.66 ± 13.82 ms (p < 0.001). TPE interval decreased from 124 ± 24.3 to 102 ± 22.5 ms (p < 0.001). Responders to CRT (19 patients, 63.3%) had larger ΔQRSD, ΔQTd, and ΔTPE than non responders (p = 0.002, 0.002, and 0.004, respectively). Cutoff values of −20 ms for each of ΔQRSD, ΔQTd, and ΔTPE could predict response to CRT with odds ratio (95% CI) of 4.05 (1.12–14.6), 2.75 (1.25–6), and 4.43 (1.21–15.5), respectively. Conclusions: CRT induced reverse electric remodeling affecting both depolarization and repolarization parameters on surface ECG. Reverse electric remodeling was associated with favorable clinical and echocardiographic outcomes.http://www.sciencedirect.com/science/article/pii/S1110260813002056Reverse electric remodelingCardiac resynchronizationElectric remodeling |
| spellingShingle | Osama Diab Hebat-Allah A. Lotfy Said Khalid Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes The Egyptian Heart Journal Reverse electric remodeling Cardiac resynchronization Electric remodeling |
| title | Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| title_full | Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| title_fullStr | Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| title_full_unstemmed | Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| title_short | Reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| title_sort | reverse electric remodeling after cardiac resynchronization therapy and relation to clinical and echocardiographic outcomes |
| topic | Reverse electric remodeling Cardiac resynchronization Electric remodeling |
| url | http://www.sciencedirect.com/science/article/pii/S1110260813002056 |
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