Add Yahoo as a preferred source to see more of our stories on Google. Have you ever felt like your life is ruled by the clock? Well, it actually is -- but it's not a clock you can see. The circadian ...

Not everyone can tap out a beat, but new research suggests that everyone has a drummer hiding deep inside the recesses of their nervous systems. According to a new study, scientists studying how ...

There are two approaches to the treatment of atrial fibrillation: one is cardioversion and treatment with antiarrhythmic drugs to maintain sinus rhythm, and the other is the use of rate-controlling ...