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Tissue Doppler Evaluation of Intraventricular Asynchrony in Isolated Left Bundle Branch Block
Author(s) -
Melek Mehmet,
Esen Ozlem,
Esen Ali Metin,
Barutcu Irfan,
Onrat Ersel,
Kaya Dayimi
Publication year - 2006
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.2006.00180.x
Subject(s) - left bundle branch block , cardiology , medicine , asynchrony (computer programming) , doppler imaging , ejection fraction , asymptomatic , bundle branch block , electrocardiography , heart failure , diastole , computer network , asynchronous communication , computer science , blood pressure
Background: The aim of this study was to evaluate normal subjects with isolated left bundle branch block (LBBB) using tissue Doppler imaging (TDI) for the presence of intraventricular asynchrony. Methods and Results: For this purpose, 23 subjects with isolated LBBB were compared with age‐matched asymptomatic healthy subjects without LBBB with respect to global ejection fraction (EF) and isovolumic contraction time (ICTm) in separate left ventricular segments. TDI evaluation revealed prolongation of the ICTm in all of the segments in the LBBB group. Moreover, the ICTm differed significantly in each segment in the LBBB group. The ICTm in the lateral segments were shown to be longer compared to the anteroseptal segments. Conclusion: Our results indicate the presence of intraventricular asynchrony in isolated LBBB. This fact may play a role in the decreased global EF and increased cardiac mortality in patients with isolated LBBB.