Atrial Fibrillation onset in relationship to Sleep quality and plasma Biomarkers (AFISBIO) is a multicentric study that aims to elucidate the relationship between various circulating substances in blood and cardiac arrhythmia – the so-called ‘atrial fibrillation’. The clinical objective of this study is to diagnose the risk of this arrhythmia. The originality of the project lies, among other things, in the analysis of circulating micro RNAs.