Abstract

Introduction: Patients with left bundle branch block (LBBB) and concomitant Coronary Artery Disease (CAD) have a worse prognosis than those with LBBB without CAD.  Exercise-induced electrocardiographic changes do not facilitate detection of CAD in patients with complete LBBB. Stress echocardiography also has reduced accuracy for detecting CAD in patients with LBBB. In this study we aimed to evaluate the sensitivity, specificity and diagnostic accuracy of DSE for diagnosis of CAD in patients with LBBB.  Method: This case control study includes 20 patients in case group with ischemic symptoms and LBBB in ECG and 20 patients in control group with ischemic symptoms but without LBBB in ECG. This patient evaluated with DSE and coronary angiography. Result: There is similar sensitivity and accuracy of DSE in detecting CAD in LBBB and normal ECG patients. Conclusion: we can suggest that DSE is a very sensitive, specific and accurate non-invasive test for identification of CAD, both in the LBBB and non LBBB patients.