Medical advances have made it increasingly common for older Americans such as Dick Cheney to receive heart transplants. Experts disagree over using age as a determiner for organ transplants. “I’m not sure we have the right to age discriminate,” said Alfred Bove, a cardiologist at Temple. “If we can offer Cheney ten years of life, and we think the heart is limiting his life expectancy, we don’t feel we have the right to refuse him because of his age.”