In this study the investigators aim to build a model to predict the maintenance of sinus rhythm (SR) after successful direct current cardioversion (DCC) incorporating standard predictors such as echocardiographic parameters, clinical parameter and 12-lead ECG parameters and new parameters, including 17-lead ECG, Oesophageal-ECG and single nucleotide polymorphisms (SNPs). Using this novel integrated prediction model will help in the identification of patients who will maintain SR after cardioversion. Another innovative aspect of our study is the use of daily rhythm monitoring using a versatile device (MyDiagnostick®). The clinical impact this study will have is that it helps the cardiologist to make a patient tailored strategy in the treatment of AF as advocated by the guidelines and to prevent exposing patients not likely to maintain SR to the potentially harmful side-effect of a rhythm-control strategy.