Atrial fibrillation, also known as AFib or AF is the most common heart arrhythmia or heart rhythm disorder in the US and around the world. AFib begins in the atria, the upper to chambers of the heart. Typically, errant electrical signals in the heart lead to an irregular heartbeat. This can cause significant symptoms including shortness of breath, pain, a sense that the patient’s heart is beating out of their chest and more. Many patients believe that they are having a heart attack and end up in the emergency room. More importantly, AFib can increase the risk of stroke by up to five times and, over the long term, can weaken the heart, leading to heart failure.