Dr. Sanjiv Narayan is Professor of Medicine at Stanford University, a practicing cardiologist and a translational scientist in the field of arrhythmia medicine. Dr. Narayan is director of Electrophysiology Research at Stanford, and has built an independently funded “bedside-to-bench-to-bedside” translational research program focused on the mechanisms for human atrial fibrillation and life-threatening ventricular arrhythmias. This work led to the development of mapping techniques for fibrillation that use computational analysis in an attempt to circumvent the limitations of electrogram analysis by computationally reconstructing optical mapping - the gold standard for mapping arrhythmias that remains unavailable in patients. This led to the discovery of rotors in human AF, with ablation (Focal Impulse and Rotor Modulation, FIRM) as the basis for novel improved therapies for cardiac fibrillation. The world-wide interest in rotors for human cardiac fibrillation continues to grow, and the FIRM approach is increasingly used at centers worldwide.