An order of such paramount importance. Webthe key therapeutic interventions that make the difference between life and death, metaphorically characterized as the 5 links in a chain of survival by the american. Immediate cpr can double or triple chances of survival. Webdr johanna moore (hennepin healthcare) presented novel work on the evolution of hup cpr which incorporates sequential elevation of the head and thorax with active compression‐decompression (acd) cpr and an impedance threshold device (itd). Webwhen a heart stops, seconds matter. But too often, when someone has a cardiac arrest away from a hospital, people in a position to help don't.