Impulses, or electrical signals, travel through both the left and right chambers of your heart to make it pump. But if the pathway is blocked, the impulses may move slower than normal or irregularly.

Left bundle branch block (LBBB) is a type heart block. It results from a problem with the electrical conduction system that enables the heart to beat. It may cause no symptoms, but an ...

Please provide your email address to receive an email when new articles are posted on . We see this all the time: A routine ECG shows a left anterior fascicular block (also known as LAFB or left ...