>> show us how it saved the life of the former vice president who, by all accounts, was near death. >> it is certainly life-saving therapy. these lvacs are implanted and what they do is take part of the blood flow, one is implanted in the left ventrical and blood is flown through this pump which propels the blood forward into a graph that goes into the aorta. in two year's time those patients who would be candidates for this, only 8% would be alive and with this device, 58% are alive for two years. >> is it true patients who would receive this device are people awaiting heart transplants? >> correct. the way this originally came to fruition is to keep patients alive to survive the transplant. as thithe devices got more durable we're investigating these devices to be destination therapy, where these devices go