Atrial fibrillation, often called AFib, is a type of irregular heartbeat that affects millions of people each year. It occurs when the upper chambers of the heart (the atria) beat out of sync with the lower chambers (the ventricles), leading to a rapid or chaotic heart rhythm. Some people with AFib feel symptoms right away, while others may not even realize they have it until it’s found during a routine checkup.

Understanding the symptoms of atrial fibrillation is an important step in recognizing when it’s time to see a provider. Left untreated, AFib can increase the risk of stroke, heart failure, and other complications.

What Is Atrial Fibrillation?

In a healthy heart, the upper and lower chambers beat in a coordinated rhythm to efficiently pump blood throughout the body. In atrial fibrillation, the atria beat irregularly and often too quickly. This causes a disorganized electrical signal and reduces the heart’s ability to move blood effectively.

AFib can occur occasionally (paroxysmal), persist over time (persistent), or become a long-term condition (permanent). The type of AFib you have can affect both the treatment approach and your risk of complications.

Common Symptoms of Atrial Fibrillation

Not everyone with AFib experiences symptoms. When they do appear, they can vary in intensity and frequency. Some people feel mild discomfort, while others may feel significantly unwell. The most common symptoms include:

• Irregular or rapid heartbeat
  
  • Often described as a fluttering or racing sensation in the chest
    
• Heart palpitations
  
  • Feeling like your heart is skipping beats or pounding unexpectedly
    
• Shortness of breath
  
  • Especially during activity or when lying down
    
• Fatigue or weakness
  
  • A general lack of energy that interferes with daily tasks
    
• Dizziness or lightheadedness
  
  • May be accompanied by confusion or difficulty concentrating
    
• Chest discomfort
  
  • A feeling of pressure or tightness rather than sharp pain
    
• Reduced exercise tolerance
  
  • Difficulty keeping up with your usual level of physical activity
    

These symptoms may come and go or remain constant, depending on the type of AFib. In some cases, the first sign of AFib may be a serious complication, such as a stroke, which is why early detection is so important.

Silent Atrial Fibrillation

A significant number of people with AFib have no noticeable symptoms. This is known as “silent” AFib. It is often discovered during an unrelated test, such as an electrocardiogram (EKG), or while investigating another health issue.

Even if it does not cause symptoms, silent AFib still increases the risk of stroke and other heart problems. That’s why regular checkups and monitoring are important, especially for individuals with risk factors such as:

• High blood pressure
  
• Heart disease
  
• Diabetes
  
• Obesity
  
• Sleep apnea
  
• A family history of AFib
  

When Should You See a Doctor?

You should contact a provider if you:

• Notice a persistent or unusual change in your heart rhythm
  
• Experience any of the symptoms listed above, especially if they interfere with daily life
  
• Have a history of heart disease or other risk factors and want to be evaluated
  

If you feel chest pain, fainting, or severe shortness of breath, seek immediate medical attention. These could be signs of a more serious heart condition.

How Is Atrial Fibrillation Diagnosed?

Diagnosis usually begins with a physical exam and a discussion of your symptoms. Common diagnostic tools include:

• Electrocardiogram (EKG) – Detects irregular heart rhythms
  
• Holter monitor – A portable device that records your heartbeat over 24 to 48 hours
  
• Event monitor – Worn for longer periods to detect infrequent episodes
  
• Echocardiogram – An ultrasound of the heart that shows how it’s functioning
  
• Blood tests – To check for underlying causes like thyroid problems or electrolyte imbalances
  

The results help determine the type of AFib you have and guide your treatment plan.

Taking the Next Step

If you have symptoms of atrial fibrillation or are concerned about your heart rhythm, don’t wait to speak with a provider. Early evaluation can prevent complications and help you stay active and well.

Epic Cardiology offers services across the Greater Los Angeles area, including communities near Chino, Pomona, San Dimas, Sherman Oaks, Lynwood, and Inglewood. For more information about services near you, contact us today to schedule a consultation and learn more about your options.