Persson AP, Fedorowski A, Hedblad B, et al. - In a prospective population-based cohort, researchers examined the link between low heart rate at 24hECG, premature atrial contractions and incident atrial fibrillation (AF). On 377 AF-free individuals in the Malmö Diet and Cancer study, 24hECGs were performed. Clinical AF retrieved from national hospital (mean follow-up 17 years) was considered as the endpoint. According to the findings, AF was independently predicted by a low mean heart rate (mHR) at 24hECG. No link was identified between mHR and supraventricular activity (SVA). Concerning AF risk, these factors were found to be independent. High AF risk was observed among people with both low mHR and increased SVA.