Heart Block -- Child
(Atrioventricular [AV] Block—Child)
- First-degree heart block—This is the mildest form of heart block. In this case, the electrical signals move more slowly than normal, but all signals reach the ventricles. There are usually no symptoms, and heartbeat and rhythm are normal.
- Second-degree heart block—A second-degree heart block means that some of the electrical signals are not reaching the ventricles. This causes “dropped beats.”
- Third-degree, or complete, heart block—This is the most serious type of heart block. In this condition, no electrical signals are able to reach the ventricles. The ventricles compensate by contracting on their own at a much slower rate than is safe for the heart to maintain full function.
|Anatomy of the Heart|
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- Previous heart problems like heart failure or heart attack
- Heart valve problems
- Certain medications
- Exposure to toxic substances
- Dizziness or light-headedness
- Fainting (syncope)
- Chest pain
- Shortness of breath
- Slow heart beat
- Weakness or fatigue
American College of Cardiology http://www.cardiosource.org/acc
American Heart Association http://www.americanheart.org/
Heart Rhythm Society http://www.hrsonline.org/
Canadian Cardiovascular Society http://www.ccs.ca/
Heart and Stroke Foundation of Canada http://ww2.heartandstroke.ca/splash/
Fauci AS, Braunwald E, Isselbacker KJ, et al. Harrison’s Principles of Internal Medicine . 14th ed. New York, NY: McGraw-Hill; 1998.
Gregoratos G. Indications and recommendations for pacemaker therapy. Am Fam Physician . 2005;71(8):1563-1570. Also available at: http://www.aafp.org/afp/20050415/1563.pdf . Accessed on August 20, 2005.
Heart block. American Heart Association website. Available at: http://www.americanheart.org/presenter.jhtml?identifier=4611 . Accessed on August 20, 2005.
Heart block. Heart Rhythm Society website. Available at: http://www.hrspatients.org/patients/heart%5Fdisorders/heart%5Fblock.asp . Accessed on August 20, 2005.
University of California San Francisco. Heart block. UCSF Benioff Childrens’ Hospital website. Available at: http://www.ucsfchildrenshospital.org/conditions/heart%5Fblock/ . Updated June 17, 2010. Accessed July 5, 2010.
- Reviewer: Kari Kassir, MD
- Review Date: 06/2012 -
- Update Date: 00/60/2012 -
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