This comprehensive text follows an evidence-based approach to thoroughly discuss Atrial septal defects. Since this congenital heart disease mostly presents in adulthood, it becomes imperative to understand the embryology, pathophysiology and anatomy in detail, for effective management of these patients. This book has strong clinical focus on anatomy, natural history, indications, imaging methods and practical aspects of disease management, which inculcates best practice in the day to day management techniques employed by cardiologists, trainees and professionals. Key Features Covers all aspects of atrial septal defects with a logical flow of topics. Serves as a useful guide to clinical cardiologists aiming to specialize in atrial septal defects and professionals entering the field. Explores future directions in diagnosis and treatment, elaborating on the use of 3D echocardiography and Intracardiac echocardiography.