In this issue of�Cardiac Electrophysiology Clinics,�guest�editors�Drs.�Kenneth A. Ellenbogen, Pugazhendhi Vijayaraman,�and�Santosh Padala�bring�their�considerable expertise to the topic of�Advances in�Physiologic�Pacing�(such as�dual-chamber (DDD and DDDR) and atrium-based pacing (AAI and AAIR) in contrast to ventricle-based pacing (VVI and VVIR).�Top experts in the field cover key topics such�as�what we have learned from computer modeling of hemodynamics and LV pacing;�troubleshooting the pacemaker EKG in patients with conduction�system�pacing; what intracardiac tracings have taught us about LBBB; multisite�pacing in CRT;�and more.