In most people, bundle branch block doesn't cause symptoms. Some people with the condition don't know they have bundle branch block. Rarely, symptoms of bundle branch block may include fainting (syncope) or feeling as if you're going to faint (presyncope).
people  bundle branch block doesn't cause symptoms  people condition don't know bundle branch block  rarely  symptoms bundle branch block may include fainting (syncope) feeling you're going faint (presyncope)
bundle branch block