09/10/2015 04:19 PM EDT
Related MedlinePlus Page: Arrhythmia
Heart block is a problem in the electrical signals in the heart.
Normally, the heart beat starts in an area in the top chambers of the heart (atria). This area is the heart's pacemaker. The electrical signals travel to the lower chambers of the heart (ventricles). This keeps the heart beat steady and regular.
Heart block occurs when the electrical signal is slowed down or does not reach the bottom chambers of the heart. Your heart may beat slowly, or it may skip beats. Heart block may resolve on its own, or it may be permanent and require treatment.
There are three degrees of heart block. First-degree heart block is the mildest type and third-degree is the most severe.
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