The 1960's, 70's and 80's brought about a revolution in the treatment of heart and kidney disease.  Dialysis, organ transplants, coronary bypass, open heart surgery and many other procedures that we think of as almost routine today - were created during those decades. Meet three of the important innovators who, between them, have saved millions of lives.  Denton Cooley performed the first human-to-human heart transplant, Willem Kolff invented dialysis and is considered the father of artificial organs, and William DeVries was the first surgeon to implant a permanent artificial heart in a dying patient.  They tell the stories here of what led them to the forefront of their field, and describe the rewards of a career spent saving lives.