Do you experience chest pain, lightheadedness, and heart palpitations? Are there moments when you can’t catch your breath?

If so, you may have atrial fibrillation. Atrial fibrillation occurs when the atria, or upper chambers of the heart, lose their normal rhythm and beat chaotically. It’s commonly known as AF or AFib. When it happens, blood doesn’t flow through the heart and body efficiently. Inefficient flow can cause the blood to pool inside the atria, which increases the risk of blood clots.

Paroxysmal AFib are episodes of AFib that occur occasionally and then stop spontaneously. Episodes can last for a few seconds or a few days before stopping and returning to normal sinus rhythm.

Some people may have single episodes of AFib. However, people with permanent damage to their heart may experience constant, or chronic AFib. There are three types of AFib: paroxysmal, persistent, and chronic (or permanent).

Persistent AFib lasts longer than seven days. It doesn’t stop without treatment. Normal rhythm may be achieved with medication or electric shock treatment.

Chronic or permanent AFib is ongoing for many years. It can’t be changed back to normal rhythm, even with medication or electrical shock therapy.

It’s not uncommon for people with paroxysmal AFib to develop persistent or chronic atrial fibrillation. has reported that 9 percent to 30 percent of cases of paroxysmal AFib progress into a more serious case after one year. Age, hypertension, obesity, and overall health all factor into the risk of developing chronic AFib.

According to data from the , between 2.7 and 6.1 million people in the United States have some type of AFib. It’s the most common abnormal heart rhythm. Studies have shown that around of people with AFib have paroxysmal AFib. However, estimates vary widely due to the difficulty of diagnosing different types.

AFib occurs more often in older people. The older you are, the more likely you are to have it. However, younger people are more likely to have paroxysmal AFib than other types.

You’re also at greater risk for the condition if you have:

  • heart disease
  • thyroid problems
  • high blood pressure
  • sleep apnea
  • diabetes
  • kidney disease
  • alcohol misuse problems

AFib is caused by damage to the heart from heart disease or high blood pressure. Medications and other factors can also lead to AFib. These factors include:

  • binge drinking, or consuming 4 to 5 drinks within 2 hours
  • stimulant medications and drugs, such as methylphenidate, pseudoephedrine, or cocaine
  • nicotine
  • caffeine
  • low potassium levels, which can lead to an electrolyte imbalance
  • low magnesium levels
  • a significant illness or surgery
  • viral infections
  • heart or heart valve defects
  • hyperthyroidism (overactive thyroid)
  • inflammation
  • family history of AFib

Read more: The dangers of alcohol and caffeine for AFib »

Symptoms of AFib can include:

  • lightheadedness
  • weakness
  • pounding heart
  • chest pain

Some people may not have any symptoms at all. However, complications can occur in anyone with AFib.


Stroke and embolism are the most serious and the most common complications of AFib. People with AFib are more likely to have a stroke than people without it. This is because blood pooling inside the heart can coagulate and form clots. Those clots can travel to the brain and cause a stroke. They can also lodge in the gut, limbs, and kidneys, blocking blood flow and starving the tissue.

If AFib persists over a long period without treatment, the heart may no longer effectively push blood and oxygen throughout the body. This could result in heart failure.

Read more: Blood clots from atrial fibrillation »

Treatment for AFib involves:

  • resetting the heart’s rhythm
  • controlling the heart’s speed
  • preventing blood clots

If you have paroxysmal AFib, your normal heart rate can return. Therefore, doctors may try to reset the normal rhythm with medications or electrical shock, also known as cardioversion.

Your doctor may suggest an antiarrhythmic medication, such as amiodarone (Cordarone) or propafenone (Rythmol), even when normal rhythm has returned. They also may prescribe beta-blockers to control blood pressure.

Another option for the treatment of AFib is ablation. Ablation is done by a heart rhythm specialist. The doctor inserts an instrument that goes through the groin and up into the areas around the heart. Then, they disable the source of the abnormal rhythm. In certain people, this intervention can treat AFib permanently.

If you have ongoing AFib, your doctor may prescribe blood-thinning medications such as warfarin (Coumadin) to prevent blood clots.

Read more: A complete list of atrial fibrillation medications »

Staying healthy is key to living a normal, active life with AFib. Underlying conditions, such as high blood pressure, thyroid disease, diabetes, and obesity, are common risk factors for developing an AFib episode.

To prevent additional paroxysmal AFib episodes, avoid excessive alcohol consumption and stimulants such as caffeine and nicotine.

Lastly, always remember to talk to your doctor, and schedule regular checkups.


Why does atrial fibrillation sometimes occur in seemingly healthy young people?


Atrial fibrillation is extremely rare in people younger than 40, occurring in about 0.5 percent of people in that age group.

One study has shown that over 50 percent of young people with atrial fibrillation have an unknown abnormal structure to their heart. More than 25 percent of the participants also had other abnormal heart rhythms, the most common being supraventricular tachycardia. Experts wonder if there may be a connection in young people between these two abnormal rhythms.

Atrial fibrillation can also be a rare complication of pregnancy. It’s believed the heart and lung changes that occur during pregnancy, even in healthy women, increase the risk of AFib. Unlike the previous study, 94 percent of women in this group had a structurally normal heart.

Judith Marcin, MDAnswers represent the opinions of our medical experts. All content is strictly informational and should not be considered medical advice.