Balim Senman, second-year internal medicine resident at Brigham and Women’s Hospital, interviews Zaid Almarzooq, cardiology fellow, about atrial fibrillation. They work through a case presentation and talk about common precipitants and risks of this arrhythmia. This episode also includes a discussion about when to pursue cardioversion, how to decide on anticoagulation therapy, as well as rate versus rhythm control. The episode concludes with a helpful mnemonic and three take-home points.