Sleep apnea can affect your heart

You know it's severe if you feel tired all the time, but now researchers say even a mild case can affect your heart.

British researchers say mild sleep apnea harms the function of the inner lining of blood vessels and leads to artery hardening.

Researchers say many people are unaware mild sleep apnea can do this. Further study revealed use of a CPAP machine reduced these effects.

- Get more L.A. breaking news, weather, traffic and sports
- Have a news tip? Send your tips, video, or pictures