How common is a bundle branch block?

How common is a bundle branch block?

• Right bundle branch block: RBBB is more common than LBBB. RBBB affects about 0.8% of people at age 50 and up to 11.3% of people by age 80.
• Left bundle branch block: LBBB affects about 0.06% to 0.1% of the U.S. population. Around 33% of people with heart failure have LBBB.