Austin FlintBorn 20 Oct 1812; died 13 Mar 1886 at age 73.American physician who was an eminent doctor and pioneer of heart research in the United States during the nineteenth century. In 1847, he founded Buffalo Medical College and taught at several medical schools. Flint was an authority on pulmonary and respiratory diseases, and popularized the use of the binaural stethoscope. The Austin Flint murmur is a heart disorder he described in 1862 in which blood from the aorta is regurgitated into the heart before contraction of the ventricles. An authority on pulmonary and respiratory diseases, he popularized the use of the binaural stethoscope. The best known of his numerous textbooks is Treatise on the Principles and Practice of Medicine (1866).Image: Austin Flint's diagram of the relations of the heart to the lungs, liver, and stomach (1859).