What happens if you heart doesn’t beat at a normal pace? Arrhythmia poses a lot of problems, and one of the most common types of arrhythmia is atrial fibrillation (AFib), which an estimated 2.7- to 6.1 million people in the United States live with, according to the Centers for Disease Control and Prevention. Common symptoms of AFib include pounding or fluttering in the chest, shortness of breath, chest pain, dizziness, and exercise intolerance. Fortunately, options are available. Learn about AFib and treatments available at the ProMedica Heart Rhythm Center, a new comprehensive facility.