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What Is Atrial Fibrillation?

Your Health / Conditions / Heart Conditions / What Is Atrial Fibrillation?​​​​​​​

Published on Nov 22, 2017
Medically reviewed by Allison J. Kean, MD


With continued improvements in life saving therapies, it’s no surprise that we’re living longer. As we get older, though, there is a higher likelihood that certain health problems will develop. Atrial fibrillation, also known as AF, is an abnormal heart rhythm that affects approximately 300,000 plus people in Australia and 35,000 in New Zealand. The older you get, the more likely you are to develop this heart condition—along with its resulting health problems, such as stroke.

Doctors don’t always screen patients for AF. Sometimes, it’s detected during a trip to the emergency department or a regular doctor’s visit, but it’s also up to you to make sure you get tested. So it’s important that you know the symptoms of AF, which can include palpitations (the sensation of a racing or irregular heart beat), chest pain, shortness of breath, dizziness, or weakness and fatigue. These symptoms can occur infrequently or more regularly. If you think you or someone in your family may have AF, here’s what you can do:

  • ​​​​​​​Find out if you're at risk. Your risk of AF may be higher if you have high blood pressure or a history of heart disease such as heart failure, a prior heart attack, or abnormal heart valves. Underlying lung disease or metabolic disorders such as thyroid disease may also play a role. The use of alcohol, caffeine, or medications with stimulant effects may also increase your risk of AF.
  • Track your symptoms. Keep a record of your symptoms. Note when they occur, what causes them to come on or go away, how long they last, and how often they occur. Also, keep track of other medical conditions you may have and their effect on your symptoms.
  • ​​​​​​​Talk with your doctor. After discussing your symptoms and completing a physical examination, your doctor may order some tests. These may include blood work, an ECG (electrocardiogram, which is a tracing of the heart’s electrical rhythm), and possibly a chest X-ray.

Allison Kean, M.D., F.A.C.C., F.A.H.A., Pfizer Global Medical Director



  1. Ball J, et al. Estimating the current and future prevalence of atrial fibrillation in the Australian adult population. MJA 2015; 202 (1): 32-35. doi: 10.5694/mja14.00238  Accessed 31/01/2017.
  2. Best Practice Journal New Zealand 2011. Vol 39 Accessed 31/01/2017.

Last reviewed 8/10/2019

External Resources

​​​​Stroke Foundation Australia - Atrial Fibrillation
Stroke Foundation of New Zealand
National Heart Foundation of Australia - Atrial fibrillation
National Heart Foundation of New Zealand - Atrial Fibrillation
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