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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Potential pro-arrhythmic effect of cardiac resynchronization therapy
Journal of the Saudi Heart Association, Volume 25, No. 3, Year 2013
Notification
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Description
A decline in mortality due to pump failure has been clearly documented after cardiac resynchronization therapy (CRT), however the impact on sudden cardiac death and the development of malignant ventricular arrhythmias remains questionable. Our study aims to investigate this alleged pro-arrhythmic effect of CRT using surface electrocardiogram (ECG) markers of pro-arrhythmia. Methods: Seventy five patients, who received CRT were included in this study. Manual measurement of corrected QT interval (QTc), Tpeak-end (Tp-e) interval, QT dispersion (QTd) and Tpeak-end dispersion during baseline 12 lead surface ECG and after applying atrial-biventricular pacing were done. Arrhythmias post CRT was recorded from ECG, 24h holter monitoring or pacemaker programmer event recorder. Results: QTc interval showed significant prolongation after CRT (498.9±50.8 vs. 476.2±41.6msec, P=0.0001). Comparing patients with major arrhythmogenic events (MAE) and increased frequency of premature ventricular contractions (PVCs) post CRT pacing to those patients without arrhythmias, there was a significant prolongation of the QTc interval (527±63.29 vs. 496.95±45.2msec, P=0.043) and Tp-e interval (94.16±9 vs. 87.41±16.37msec, P=0.049). While in the arrhythmogenic group, there was an insignificant decrease in QTd and Tpeak-end dispersion. Conclusion: QTc and Tp-e intervals are a potential predictor of occurrence of MAE and PVCs. On the other hand, Tp-e dispersion and QTd did not show a predictive potential for arrhythmia. © 2013 .
Authors & Co-Authors
Tayeh, Osama
Egypt, Cairo
Faculty of Medicine
Farouk, Waleed
Egypt, Cairo
Faculty of Medicine
ElAzab, Abdo
Egypt, Cairo
Faculty of Medicine
Khald, Hassan
Egypt, Cairo
Faculty of Medicine
Curnis, Antonio
Italy, Brescia
Università Degli Studi Di Brescia
Statistics
Citations: 9
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.jsha.2013.05.002
ISSN:
10167315
e-ISSN:
22125043
Research Areas
Cancer
Maternal And Child Health
Noncommunicable Diseases