Dr. De la Cruz participates as a speaker at the First Annual Symposium on Stroke and Atrial Fibrillation, organized by the San Cecilio Clinical University Hospital in Granada. He reviewed the current state of knowledge regarding secondary prevention treatment in patients with embolic stroke of unknown origin. Current evidence shows that indiscriminate anticoagulation is not indicated, and an exhaustive study of each case is essential to decide which is the most appropriate treatment.