In this episode, Dr. Valentin Fuster discusses a groundbreaking study on cardiac MRI predictors of arrhythmic sudden cardiac events in patients with Fontan circulation, highlighting key risk factors for these life-threatening incidents. The study, part of the multi-center FORCE registry, reveals significant findings, including the impact of clinical status and ventricular function, while emphasizing the importance of large-scale research in improving outcomes for single ventricle patients.