Thein PM, et al. - Using the medical emergency team (MET) database, researchers described the characteristics, management, and outcomes of hospitalized adult patients with new-onset atrial fibrillation (AF). Between 2015 and 2016, patients who had a “MET call” activated for tachycardia were identified. The investigators excluded patients with sinus tachycardia, pre-existing AF/atrial flutter, or other known tachyarrhythmia. According to findings, left ventricular systolic dysfunction was correlated with increased all-cause mortality in hospitalized patients with new-onset AF. On the other hand, lower serum potassium levels were related to an increased length of stay. The authors planned to conduct a prospective study to compare results based on in-hospital treatment strategies.