In this episode, Dr. Valentin Fuster summarizes the October 2024 issue of the JACC Journal, highlighting four pivotal studies on atrial fibrillation, anticoagulation strategies in STEMI, heart failure risk assessment, and the impact of urinary metal levels on coronary artery calcification. Emphasizing the increasing prevalence of atrial fibrillation and the critical role of biomarkers, he underscores the urgent need for enhanced prevention strategies and public health actions regarding environmental metal exposure.