The development of a new blood supply to the heart by operation.

By implantation of the pectoral muscle into the pericardium, Beck provided a collateral circulation to the heart for the relief of myocardial ischemia. This paper recorded the first operation on a man. It was preceded by Beck’s paper, written with V.L. Tichy an A.R. Moritz, recording operations on dogs: "Production of a collateral circulation to the heart", Proc. Soc. exp. Biol. Med.,1935, 32,759-61.