1947 first day cover issued for the "!00th Anniversary of the American Heart Association," personally autographed and date by renowned heart surgeon Denton Cooley. A COA from Hudson Valley Autographs accompanies this item.

Denton Cooley (August 22, 1920 – November 18, 2016) was an American heart and cardiothoracic surgeon famous for performing the first implantation of a total artificial heart. Cooley was also the founder and surgeon in-chief of The Texas Heart Institute, chief of Cardiovascular Surgery at clinical partner Baylor St. Luke's Medical Center, consultant in Cardiovascular Surgery at Texas Children's Hospital and a clinical professor of Surgery at the University of Texas Health Science Center at Houston.