Atrial Fibrillation (Afib) Center

Atrial fibrillation is an irregular and often rapid heart rate that can increase your risk of stroke, heart failure and other heart-related complications.

During atrial fibrillation, the heart's two upper chambers (the atria) beat chaotically and irregularly — out of coordination with the two lower chambers (the ventricles) of the heart. Atrial fibrillation symptoms often include heart palpitations, shortness of breath and weakness.

Episodes of atrial fibrillation can come and go, or you may develop atrial fibrillation that doesn't go away and may require treatment. Although atrial fibrillation itself usually isn't life-threatening, it is a serious medical condition that sometimes requires emergency treatment.

It may lead to complications. Atrial fibrillation can lead to blood clots forming in the heart that may circulate to other organs and lead to blocked blood flow (ischemia).

The heart has its own electrical system. This system makes the signals that start each heartbeat. The heartbeat begins in 1 of the 2 upper chambers of the heart (atria). A problem can make the atria beat faster than normal. The atria may beat fast but still evenly. This problem is called atrial flutter. If the atria beat very fast and also unevenly, it is called atrial fibrillation (AFib).

Causes of Atrial Flutter and Atrial Fibrillation can include:

  • Previous heart attack
  • High blood pressure
  • Thyroid problems

In many cases, the cause is unknown.

Symptoms of Atrial Flutter and AFib include the following:

  • Palpitations (a fluttering, fast heartbeat)
  • Weakness or tiredness
  • Shortness of breath
  • Chest pain or tightness
  • Dizziness or lightheadedness
  • Fainting spells


Treatments for atrial fibrillation may include medications and other interventions to try to alter the heart's electrical system.

Make a Provider Appointment

Call 812.473.2642 to schedule your visit today.


Your secure, online medical connection.

Log In

In QuickerIn Quicker

Wait at home. Check in to Urgent Care now.

Check In

  • Buy a Gift

    Send flowers or a gift and brighten a patient's day today.  

  • Pay My Bill

    Pay a hospital and provider bill online.

  • Send an e card

    Share an eCard with a patient at St. Mary's.

  • Make a Donation

    Interested in giving? Make a donation or learn more about ways to give.