A congenital abnormality of the heart characterized by pulmonary stenosis, an opening in the interventricular septum, malposition of the aorta over both ventricles, and hypertrophy of the right ventricle. Fallot, �tienne-Louis-Arthur (1850-1911), French physician. Fallot published in 1888 an article on cardiac anomalies in which he described the form of congenital heart disease producing cyanosis that now bears his name. His description was not the first but an improvement that analyzed and correlated the clinical with postmortem observations and gave all four of the identifying characteristics.