Maude Abbott was a pediatrician and cardiologist who spent her life working as a pathologist at McGill University, Montreal, Quebec and published over 100 articles. Her magnum opus was The Atlas of Congenital Heart Disease, which listed a classification of cardiac disease based on 1000 pathological cases. Her work as a pathologist and her correlation of pathological samples with physical symptoms provided a foundation of the classification of heart disease and the medical-surgical interventions. She also predicted causation and prevention. She introduced the use of pathological specimens to medical teaching. In addition to her papers on pathology, Abbott also published articles and books on the history of medicine. In January 2000, Canada Post produced a stamp as a tribute to her work.