While static images remain the mainstay of the written page, you as a reader will now have access to a wonderful e-library of moving images, curated by our young colleague Justin Tretter Importantly, new chapters have been added Others have been consolidated to provide the reader with a more comprehensive overview Consequently, an entire section is now devoted to the functionally univentricular heart, and in particular, to one of our most significant challenges, the Fontan circulation Although every edition has been solidly grounded in the detailed anatomic description, clinical management, and outcomes of heart disease in children and adolescents, we have always strived to view heart disease in the context of its impact on the entire body Hence, the section on the central nervous system and neurodevelopmental considerations in children and young adults with congenital heart disease has been completely reworked We have added specific new chapters addressing such diverse issues as the acute and chronic renal consequences of heart disease in children and the impact of pharmacogenetics in treatment and outcomes Those of you who already own the third edition will also notice important changes to the content in many of the more established chapters Each and every one has been rewritten to include discussions of contemporary surgical practice, nursing care, and family support Additionally, new sections and chapters regarding the multidisciplinary approach to interstage management of the functionally univentricular heart, discharge planning and team communication, models and pathways of care, and the global burden of pediatric heart disease in low- and middle-income countries, are all new elements of the book As a result, we believe that our book will have something for every member of the multidisciplinary team, be they pediatric cardiologists, surgeons, intensivists, nurses, physicians’ assistants, perfusionists, anesthesiologists, or other allied professionals committed to the care of children and young adults with congenital heart disease All this, we hope, means that the fourth edition, now appropriately titled Anderson's Pediatric Cardiology, will continue to be the most comprehensive learning resource for those involved in our field We hope you agree and, with us, will look forward to another 36 years of extraordinary advances in the care of children and young adults with heart disease Gil Wernovsky Robert H Anderson Krishna Kumar Kathleen Mussatto Andrew R Redington James S Tweddell Justin T Tretter Acknowledgments I thank all my mentors and teachers, but most specifically Peter Lang, Jane Newburger, and David Wessel; not only for being such wonderful role models as physicians and leaders, but also for providing unfailing guidance and support over the past 3 decades I also would like to thank all my clinical colleagues, fellows, residents, students, patients, and families who have taught me the most essential thing: the importance of staying humble and continuing to learn Every Single Day I want to thank my wife Lauren, as well as Simon, Magda, Matt, and Jenna for their love, patience, and encouragement Professor Anderson, thank you for your insight, teaching, meticulous attention to detail, and for allowing us to at least use some abbreviations in this text Jim, Kathy, KK, Andrew, and Justin, I am honored and grateful to have worked with such a great group of coeditors for this fourth edition Robin Carter, Lisa Barnes, Carrie Stetz, and the entire team production team at Elsevier have been terrific to work with from the very beginning Finally, I would like to thank my parents, who besides being wonderful loving people, showed great insight and vision by not allowing me to try to become a musician –, Gil Wernovsky I would like to acknowledge the insight of the editorial leaders to include a nursing perspective in this new edition I also thank all the nurses who graciously contributed to the content, as well as my family I could not do this without your support –, Kathleen Mussatto We are indebted to Alan O'Donnell, PA-C, for his initiative and hard work in creating the text-narrated intraoperative surgical videos contributed from Cincinnati Children's Hospital Medical Center –, Justin T Tretter