The main complication of bundle branch block is a slow heart rate, which can sometimes cause fainting.
People who have a heart attack and develop a bundle branch block have a higher chance of complications, including sudden cardiac death, than do people who have heart attacks and don't develop a bundle branch block.
Because bundle branch block affects the electrical activity of your heart, it can sometimes complicate the accurate diagnosis of other heart conditions, especially heart attacks, and lead to delays in proper management of those problems.
April 10, 2015
- Conduction disorders. American Heart Association. http://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/Conduction-Disorders_UCM_302046_Article.jsp. Accessed Feb. 22, 2015.
- Sauer WH. Left bundle branch block. http://www.uptodate.com/home. Accessed Feb. 22, 2015.
- Sauer WH. Right bundle branch block. http://www.uptodate.com/home. Accessed Feb. 22, 2015.
- Longo DL, et al. Electrocardiography. In: Harrison's Principles of Internal Medicine. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://accessmedicine.com. Accessed Feb. 22, 2015.
- Bussink BE, et al. Right bundle branch block: Prevalence, risk factors, and outcome in the general population: Results from the Copenhagen City Heart Study. European Heart Journal. 2013;34:138.
- Cardiac resynchronization therapy. American Heart Association. http://www.heart.org/HEARTORG/Conditions/HeartFailure/Cardiac-Resynchronization-Therapy_UCM_452920_Article.jsp. Accessed Feb. 22, 2015.
- Mankad R (expert opinion). Mayo Clinic, Rochester, Minn. March 24, 2015.
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