“…Many authors have since furthered the knowledge and understanding of the management of cardiac arrest, and large series describing resuscitation have been published (Ayers and Doyle, 1962;Gilston, 1965;Head, Hudson, Head, and Head, 1962;Jude, Kouwenhoven, and Knickerbocker, 1961;Kaplan and Knott, 1964;Klassen, Broadhurst, Peretz, and Johnson, 1963;Lawrence, Haley, and Gillies, 1964;Lillehei, Lavadia, DeWall, and Sellers, 1965;Saphir, 1968). Most reporters stress the relationship between the length of the resuscitative effort and the prognosis.…”