Premium
Left Ventricular Asynchrony in Patients with Right Bundle Branch Block and Normal Ejection Fraction
Author(s) -
STEGEMANN BERTHOLD,
DREGER HENRYK,
ISMER BRUNO,
BAUMANN GERT,
MELZER CHRISTOPH
Publication year - 2013
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/pace.12043
Subject(s) - medicine , asynchrony (computer programming) , cardiology , left bundle branch block , right bundle branch block , ejection fraction , bundle branch block , electrocardiography , heart failure , computer network , asynchronous communication , computer science
Aims The role of right bundle branch block (RBBB) for the induction of left ventricular (LV) asynchrony is discussed controversially. The objective of this study was to assess presence and degree of LV asynchrony in patients with RBBB, left bundle branch block (LBBB), or left anterior hemiblock (LAH) and normal LV function. Methods We included 15 patients with RBBB, 13 patients with RBBB and concomitant LAH, 10 patients with pure LBBB, and 100 healthy controls into this study. All patients had normal LV function. Interventricular asynchrony was assessed as the difference of the right and LV ejection delay. Intraventricular delay was obtained by tissue synchronicity imaging‐guided tissue Doppler imaging measurement . Results Interventricular and left intraventricular asynchrony were linked to the presence of an LBBB. No left intraventricular asynchrony was noted during pure RBBB; interventricular delays were negative (aortic flow preceding pulmonary flow) in the presence of RBBB . Conclusion In patients with normal LV function, intraventricular asynchrony depends on the presence of an LBBB and interventricular asynchrony is inversed in the presence of RBBB . (PACE 2013; 36:63–68)