Alfred Einstein Cohn (1879–1957) was an American physician and author who worked at the Rockefeller Institute for Medical Research, where he was the director of the Laboratory for Heart Disease.[1] He was one of the first people to use electrocardiograms in a clinical setting.[2] He corresponded with several anti-Nazi organizations throughout World War, inquiring about their various actions.[3][1] He died at his home, Iron Hill Farm, in New Milford, Connecticut in 1957.