In this video, Dr. K K Aggarwal, President Heart Care Foundation of India and Group Editor in Chief MEDtalks, will discuss about LBB vs RBB in an ECG. He says that never to ignore LBB occurrence in an ECG. LBB should be investigated. If it is an acute LBB, it is a sign of myocardial infarction. If it is a chronic LBB, then it might be some cardiomyopathy or low ejection fraction.