Abugroun A, Elawad A, Okoh AK, et al. - Researchers used the National Inpatient Sample database to investigate the influence of atrial fibrillation (AF) on the hospitalization results in patients ≥ 60 years of age with implantable cardioverter defibrillators (ICD). They identified all patients aged ≥ 60 with a history of ICD placement, and were admitted with a primary diagnosis of heart failure during the years 2016-2017. On the basis of the history of AF, participants were divided into 2 groups. There were 178,045 patients who took part in this study, of which 56.2% had AF. Correlation of AF with elevated mortality, cardiogenic shock, acute kidney injury (AKI), and lower risk for myocardial infarction, was found. In ages ≤ 75, ≤ 75, and ≤ 80 years, AF was shown to be significantly correlated with higher risk for mortality, cardiogenic shock and AKI, respectively. Overall findings demonstrate independent predictive value of AF for increased all-cause in-hospital mortality and cardiogenic shock. Age was shown to have an impact on such risk.