Provided video gives you an insight into bundle branch block. The pathophysiology is explained along with the characteristic ECG features. The video also teaches how to differentiate between bundle branch blocks of two sides of the heart. Lastly, congenital and acquired bundle branch block are also discussed. Timeline 0:00 Introduction 0:03 Mechanism explanation 0:37 Effect on ECG 0:50 How to diagnose and differentiate between right and left bundle branch block 3:05 Congenital and acquired bundle branch block