This factsheet is for people who have heart block, or who would like information about it.
Heart block causes your heartbeat to slow down or beat irregularly. It happens when the electrical signals that control your heartbeat are slowed down or blocked as they travel through your heart.
It’s mostly caused by old age or heart disease. Heart block is a type of arrhythmia (irregular heartbeat).
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Published by Bupa's Health Information Team, June 2010.