Atrial fibrillation (AF) is often diagnosed as an incidental finding during a routine medical check. The prevalence increases with age and the presence of CVD further increases the risk of AF. Around 15-30% of patients with AF are asymptomatic. When patients present to their GP the most common symptoms of AF include: palpitations, chest pain, breathlessness and a reduction in exercise/functional capacity. To establish a diagnosis of AF, rhythm documentation with an ECG showing at least 30 seconds of AF is required.