Experiments in the Revival of Organisms.

This video clip purportedly show the resuscitation of a dead dog, as conducted in the 1940 by Dr. S.S. Bryukhonenko at the Institute of Experimental Physiology and Therapy in the former USSR.

Mind you, it's a propaganda video from an era designed to make the Russians look good (regardless of scientific merit - some Stalin-era scientists even outright faked data to make them look good / avoid the gulags).

Link: "Experiments in the Revival of Organisms" (via WFMU Beware of the Blog - worth a read)

Before you dismiss it out of hand, however, see also this Pittsburgh Tribune article on how scientists at the Safar Center for Resuscitation Research revived dogs 3 hours after clinical death (no brain activity).

Safar, who died two years ago, proposed flushing the circulatory system with an ice-cold salt solution, which would drop the core body temperature to about 50 degrees compared to the usual 98.6 degrees.

Cooling the body in this way would buy extra time to transport injured soldiers or trauma victims in cardiac arrest to the hospital, Safar reasoned. The cold temperature would have a preserving effect so no damage would occur to tissues and organs, even though the heart would be stopped.

Link

BTW, the Safar Center is named after Dr. Peter Safar, the inventor of CPR.