This information is intended for members of the public in UK only.

What causes AF?

The exact cause of AF is not fully understood, but the risk increases as you get older and it is more common in people with other heart conditions such as:

  • High blood pressure
  • Thickening/blockage of the blood vessels that supply the heart
  • Heart attack
  • Heart disease from birth
  • After heart surgery
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Reference information

This section contains reference information only, is general in nature and intended to provide a general overview of atrial fibrillation for the general public in the UK. It is not intended to replace in any way the opinion of a healthcare professional. For specific information about this pathology and/or detection, diagnosis, prognosis, administration and, where applicable, appropriate treatment for each specific case, please promptly consult a healthcare professional. The use of this website is subject to the legal notice, the privacy and cookie policy, and the applicable laws and regulations.