What causes atrial fibrillation?

Atrial fibrillation (AFib) is the most common type of irregular heartbeat. It occurs when the upper chambers of the heart (the atria) beat too fast and irregularly. This can cause blood to pool in the atria and form clots, which can increase the risk of stroke, heart failure, and other complications.

There are many different things that can cause AFib, including:

* Age: AFib is more common in older adults.

* High blood pressure: High blood pressure is the most common risk factor for AFib.

* Heart disease: AFib is more common in people who have other types of heart disease, such as heart failure, valve disease, or coronary artery disease.

* Lung disease: AFib is more common in people who have lung disease, such as asthma, chronic obstructive pulmonary disease (COPD), or sleep apnea.

* Diabetes: Diabetes is a risk factor for AFib.

* Obesity: Obesity is a risk factor for AFib.

* Thyroid problems: AFib is more common in people who have thyroid problems, such as hyperthyroidism or hypothyroidism.

* Alcohol use: Heavy alcohol use can increase the risk of AFib.

* Caffeine use: Excessive caffeine use can trigger AFib in some people.

* Illegal drug use: Illegal drugs, such as cocaine and amphetamines, can increase the risk of AFib.

In some cases, AFib can be caused by a combination of factors. For example, a person who has high blood pressure, heart disease, and diabetes is more likely to develop AFib than someone who has only one of these risk factors.

If you have any of the risk factors for AFib, it is important to talk to your doctor about your risk and how to manage it.