Abstract

ABSTRACT
Fifty patients with electrocardiographic (ECG) evidence of left Bundle Branch Block (LBBB) and fifty control group
with no significant electrocardiographic findings were studied over the period from October 2004 to July 2005 for
evidence of Coronary Artery Disease (CAD) and Left Ventricular (LV) dysfunction. Both groups underwent cardiac
catheterization and CAD considered present if there was 70% and more lumen diameter stenosis except for Left Main
Coronary Artery (LMCA) was 50% and more. LV function was assessed visually and the function was considered
normal or abnormal.
The CAD was found in 37/50 (74%) of patients with LBBB, it was significantly (P<0.002) higher than in control
group 14/50 (28%), the percentage of LAD artery disease was significantly (P<0.001) higher in patients with LBBB
36/50 (72%) than in control 5/50 (10%) and LV dysfunction was present in 30/ 50 (60%) of patients with LBBB it
was significantly (P< 0.001) higher than in control 9/50 (18%)
In conclusion: the study showed that the patients with LBBB had higher incidence of CAD and LV dysfunction