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.

Among patients with a wide QRS, cardiac resynchronization therapy (CRT) seems to help patients with an intraventricular conduction delay (IVCD) as much as it does those with left bundle branch block ...

A person with RBBB typically does not have symptoms and may not know they have the condition. On rare occasions, a person may faint due to a severe block, though this is unlikely to occur unless other ...