Hi, I was recently diagnosed with left bundle branch block. I am 49 years old and prior to this diagnosis have had high blood pressure for 12 years. I take atenolol, hydroclorathiazide, and a low dose aspirin. I have undergone a nuclear stress test, echo cardio gram , complete blood work and have worn a heart haltor for 24 hours. All results are good. No evidence of blockages or heart disease of any kind. My question is, some literature I read states beta blockers may be a cause of BBB. And some literature states beta blockers being given for BBB. I am confused by this. Can you please clarify.