In this issue of Veterinary Clinics: Small Animal Practice, guest editor Dr. Joshua Stern brings his considerable expertise to the topic of Advancements in Companion Animal Cardiology. Cardiovascular disease of companion animals has seen a boom in research productivity and novel therapies that make the future of cardiac care very bright. In this issue, top experts highlight advances in diagnosis and treatment for common cardiac diseases such as hypertrophic cardiomyopathy, mitral valve degeneration, and dilated cardiomyopathy.