Carbon Monoxide Testing

Carbon monoxide is rarely thought of as a good thing. Researchers say it could eventually be beneficial to some heart patients.

Tests on mice and rats found that low concentrations of carbon monoxide helped arteries damaged in angioplasty and transplants. It's too early to tell if the therapy can help humans.

Carbon monoxide acts to prevent excessive cell growth that often occurs after clogged arteries are surgically widened or transplanted.