This issue of Cardiac Electrophysiology Clinics, guest edited by Mohammad Shenasa and Amin Al-Ahmad, is the second part of our Advances in Cardiac Mapping and Catheter Ablation issue. Article topics will include, but are not limited to, New Findings in Atrial Fibrillation Mechanisms; Mapping and Ablation of Neuraxial in Patients with Ventricular Arrhythmias; How to Map and Ablate Rotors in Atrial Fibrillation; Post-ablation Atrial Arrhythmias; Substrate...