CRP and obesity due to melanocortin 4 receptor deficiency: Previous studies have demonstrated several risk factors related to NOAF, such as C-reactive protein, N-terminal pro-brain natriuretic peptide, CHADS2 score, high sensitivity troponin T, left ventricular ejection fraction, left atrium diameter, and obesity among others.[6–11] However, the definite risk stratification of NOAF in AMI remains uncertain, and the aim of our systematic review and meta-analysis is to summarize more clinical risk factors for NOAF.