It was well before dawn last Wednesday when Dr. Jack Copeland, the leading heart surgeon at Tucson's University Medical Center, had to face the grim truth: his patient was dying. Thomas Creighton, a 33-year-old Arizona auto mechanic, had undergone transplant surgery 24 hours earlier to replace a heart , ravaged by two heart attacks and cardiomyopathy, a progressive disease of the heart muscle. Right from the start there were problems with the transplanted organ, and a pacemaker had to be used. Then Creighton's body began rejecting the heart. At 3 a.m. he went into cardiac arrest.
As doctors struggled to keep...