Overview
Atrial fibrillation (AFib) causes and symptoms
Atrial fibrillation, frequently called AFib, is a common cause of sustained irregular heartbeats. Afib starts as a rapid and irregular heart rhythm from the top chambers of the heart, called the atria. The rapid rate in the atria may cause the bottom chambers of the heart, the ventricles, to also beat rapidly and/or irregularly.
Some associated consequences of AFib include an increased risk of stroke, memory problems or other heart problems.
Given that Afib symptoms may be mild, absent or occurring intermittently, many people may not know they have it. AFib can lead to more serious conditions, so it’s important to speak with a health care professional about any symptoms you have. Only they can determine whether symptoms indicate AFib or another condition.
Causes
There are many factors that can contribute to AFib, including:
High blood pressure
Diabetes
Being overweight
Sedentary lifestyle (lack of exercise)
Untreated sleep apnea
Heart valve disease
A weakened heart muscle (called cardiomyopathy)
Lung disease
Abnormalities of the thyroid gland
Alcohol use
For some people, there’s no identifiable cause.
Symptoms
Symptoms of heart rhythm disorders and AFib can vary and include:
Chest pain
Dizziness
Fatigue (tiredness)
Fluttering sensation in your chest
Heart palpitations (skipped beats)
Lightheadedness or passing out
Shortness of breath
Or no symptoms at all
Seek emergency care if your symptoms are severe or combined with chest pain.
Diagnosis and treatment
Advanced treatment options
For some patients, episodes of AFib may stop on their own. For others, AFib won’t stop unless they're given a medication, an electrical cardioversion (an electrical shock to the heart) or an ablation to interrupt the AFib.
From helping you manage your risk factors and symptoms to advanced treatment options, UW Health offers a full spectrum of care for all levels of AFib.
Meet our team
Expert care for your whole family
UW Health treats the most complex heart rhythm disorders. Working together, with your input, our team will design a treatment plan that’s best for you.
At UW Health, you have access to:
Adult and pediatric cardiologists
Cardiothoracic surgeons
Electrophysiologists
Genetic counselors
Advanced practice providers
Locations
Top-ranked heart care made convenient for you
We offer cardiovascular medicine, electrophysiology and preventive cardiology clinics at multiple Madison locations. We also have cardiovascular outreach clinics in Beaver Dam, Fort Atkinson, La Farge, Mauston, Portage, Prairie du Sac and Reedsburg.
Patient and support services