Pulmonary veins in the substrate for atrial fibrillation The “venous wave” hypothesis**eEditorials published in the Journal of the American College of Cardiologyreflect the views of the authors and do not necessarily represent the views of JACCor the American College of Cardiology. Dr. Sanders is the recipient of a Neil Hamilton Fairley fellowship from the National Health and Medical Research Council of Australia and the Ralph Reader fellowship from the National Heart Foundation of Australia.