Relation between left ventricular geometry and transmural dispersion of repolarization

Saba, Magdi M., Arain, Salman A., Lavie, Carl J., Abi-Samra, Freddy M., Ibrahim, Salma S., Ventura, Hector O. and Milani, Richard V. (2005) Relation between left ventricular geometry and transmural dispersion of repolarization. American Journal of Cardiology, 96 7: 952-955. doi:10.1016/j.amjcard.2005.05.053


Author Saba, Magdi M.
Arain, Salman A.
Lavie, Carl J.
Abi-Samra, Freddy M.
Ibrahim, Salma S.
Ventura, Hector O.
Milani, Richard V.
Title Relation between left ventricular geometry and transmural dispersion of repolarization
Journal name American Journal of Cardiology   Check publisher's open access policy
ISSN 0002-9149
1879-1913
Publication date 2005-10-01
Sub-type Article (original research)
DOI 10.1016/j.amjcard.2005.05.053
Volume 96
Issue 7
Start page 952
End page 955
Total pages 4
Place of publication Bridgewater, NJ, United States
Publisher Excerpta Medica
Language eng
Formatted abstract
Studies have shown an association between left ventricular (LV) geometry and complex ventricular ectopic activity. Increased transmural dispersion of repolarization (TDR), which correlates to the interval from the peak to the end of the T wave (Tpe) on the surface electrocardiogram, is linked to ventricular tachyarrhythmias. The relation between LV geometry and TDR is unknown. The mean Tpe interval, measured from leads V1 to V3 of the surface electrocardiogram, was assessed in 300 patients (50% men) who had normal LV systolic function and QRS duration and were categorized into 3 equal groups, which were matched by age and gender, according to echocardiographically determined LV geometry (normal structure, concentric remodeling, and LV hypertrophy). The Tpe interval was corrected for the QT interval using Tpe/QTc and was compared among the 3 groups. Compared with those who had normal LV structure, the Tpe interval was significantly prolonged in those who had LV hypertrophy and significantly shortened in those who had concentric remodeling (p = <0.0001 for the 2 comparisons). Correcting for the QT interval using Tpe/QTc yielded similar results. Thus, TDR was increased in patients who had LV hypertrophy but decreased in concentric remodeling compared with those who had normal cardiac structure. Although LV hypertrophy represents a maladaptive geometric process that results in an unfavorable electrical substrate, concentric remodeling may represent a structural adaptation that has a more favorable electrical milieu.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
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Created: Mon, 14 Mar 2011, 09:38:11 EST