The presence of LBBB presents a major challenge in the non-invasive diagnosis of CAD. Thus, coronary angiography is usually required to confirm diagnosis. The aim of this study was to investigate the predictors of CAD among patients with LBBB and identify different ECG features of ischemic LBBB.
Methods: This was a retrospective descriptive study of the records of patients from Zagazig University Catheterization Laboratory, Egypt, from May 2019 to May 2022.
Patients with LBBB were classified according to presence of CAD on coronary angiogram into:
• Group I: Includes 96 patients with LBBB and CAD.
• Group II: Includes 72 patients with LBBB without CAD.
• Special focusing on clinical and demographic features, LBBB criteria, echocardiography and coronary angiography.
Results: LBBB was attributed to CAD in 57.2% of LBBB patients. Patients with LBBB and CAD were older, more in males, with previous MI and PCI. Also there are a significant decrease of EF when comparing group I with group II (p < 0.05). Notching of upstroke of S wave in V3 was significantly present in CAD group (p: 0.02). Multivariate logistic regression analysis among patients with LBBB performed to find the predictors of CAD showed that EF