Atrial fibrillation, also known as A-fib or AF, is a heart arrhythmia that can increase your risk of blood clots. A-fib is one of the most common types of arrhythmias that starts in the atria, and affects millions of people. When diagnosed and treated, the chances of experiencing a life-threatening episode can be decreased. Lifestyle habits can greatly contribute to preventing atrial fibrillation. If you've been diagnosed with A-fib, it's important to stay informed about your condition. Read our articles below to discover more information on the causes, symptoms, and treatments for atrial fibrillation.