Atrial fibrillation (A fib or AF) is considered to be the most common type of heart arrhythmia [1]. The sinus node, located in the right atrium, is a group of specialized cells that serve as an internal pacemaker for the human body. This is important because the node spontaneously generates the heartbeat. It releases an electrical impulse that causes the cardiac cells within the two upper chambers, or atria, to become excitable and conduct the impulse to the surrounding cells.