What is Atrial Fibrillation

Atrial fibrillation, or AFib, is a common condition that is estimated to affect up to 4% of the population. But what is atrial fibrillation, exactly? To say that it’s an “irregular heartbeat” doesn’t quite explain exactly how this condition affects people.

If you experience chaotic bouts with a rapid, irregular heartbeat that starts pounding in your chest, you may have every reason to be concerned especially if you have any of the common risk factors for atrial fibrillation, like high blood pressure, an overactive thyroid or a prior heart attack.

AFib is caused by abnormal heart rhythms that keep blood from properly flowing out of the heart’s upper chambers. As a result, AFib sufferers experience a rapid heart beat. Even while resting, their heart rates can soar past 180 beats per minute.

The real problem with AFib isn’t so easy to detect, however. Aside from palpitations in their chests, people with AFib may experience:

  • Severe weakness and fatigue
  • Lightheadedness or dizziness
  • Shortness of breath
  • Chest pain

Atrial fibrillation is also associated with cognitive impairments, such as difficulty concentrating, problems learning or retaining new information and trouble making decisions. The thought is that tiny blood clots gradually create a sort of cumulative damage in the brain.

How Atrial Fibrillation Effects The Heart

AFiB is one of the most common heart conditions, affecting 4% of the adult population. Characterized by a rapid, irregular heartbeat, AFIB is largely due to abnormal electrical impulses that cause the atria of the heart to quiver when it should be beating steadily. Blood flow is reduced and is not completely pumped out of the two small upper chambers of the heart, the atria. This negatively impacts cardiac performance and also allows the blood to pool and potentially clot. At rest, a normal heart rate is approximately 60 – 100 beats per minute. In a person with AFIB, that heart rate can skyrocket to 180 bpm or even higher. Thorough testing by your health care provider can spot abnormalities in the heart’s rhythm before any obvious symptoms are noticed.

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What are the symptoms?

Whether it is caused by nerves, exercise or too much caffeine, most people experience a racing heart from time to time.  Most cases are harmless, but AFIB is a serious medical condition that may often be long lasting. Some people with AFIB experience no symptoms at all.

But for others, AFIB may cause:

  • Exercise intolerance
  • Fatigue
  • Severe shortness of breath
  • Chest pain
  • Palpitations
  • Light-headiness

What causes atrial fibrillation?

Your heart is divided into four chambers: the two upper chambers called atria, and two lower chambers called ventricles. In order for blood to be pumped through your body, a group of cells sends electrical impulses to the atria that tells your heart to contract. Contractions of the heart send approximately five quarts of blood through your body every minute. In people with AF, however, the impulses are sent chaotically. The atria quiver instead of beat; the blood isn’t completely pumped out and may pool and potentially clot.

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Are You At Risk?

Your chances of developing AFIB increase with age. AFIB occurs more commonly in women than in men. According to the Framingham Heart Study, AFIB is associated with a higher risk of death for women than for men. You are also at greater risk of developing AFIB if you suffer from:

  • Overactive thyroid
  • High blood pressure
  • A prior heart attack
  • Congestive heart failure
  • Valve disease
  • Congenital disorders


AFIB can sometimes be diagnosed with a stethoscope during an exam by a doctor or other health care provider and is confirmed or diagnosed with an electrocardiogram (EKG). There are several types of EKG’s.

Types of EKG’s

Resting EKG – Electrical activity in the heart is monitored when a person is at rest.

Exercise EKG – Activity is monitored when a person jogs on a treadmill or exercises on a stationary bike.

24-hour EKG (Holter Monitor) – A person wears a small, portable monitor that detects activity over the course of a day.

Transtelephonic event monitoring – A person wears a monitor for a period of a few days to several weeks. When AF is felt, the person telephones a monitoring station or activates the monitor’s memory function. This type of EKG is particularly useful in detecting AF that occurs only once every few days or weeks. Unfortunately, this type of monitor does not record heart events while you are sleeping.

Learn More About Afid Facts and How to Obtain an AFib diagnosis

If you experience a rapid heartbeat, fatigue and other symptoms associated with AFib and don’t know how to get an AFib diagnosis, Dr. Wolf can recommend the right diagnostic tool for your needs.

Once your AFib is documented, you can decide on the right treatment for your needs. A lifetime of blood thinners is not your only option. The Wolf Mini-Maze has been helping AFib patients eliminate their need for blood thinners and reduce their stroke risk by 97% since 2003.