Atrial fibrillation (AF) is one of the most common types of arrhythmia. AF is associated with a wide range of complications in clinical practice and may contribute to 5% of stroke cases a year. Mortality may increase to 34% in patients with heart failure if AF is concomitant. It is known that AF increases in the prevalence with advancing age. The incidence of AF is approximately 0.1% in the patients under 40 years of age while it approaches 1.5 – 2% in the group over 60 years of age.