Researchers believe the increase in heart rate might demonstrate what they call the fight or flight response.

VOA: special.2009.08.18

"I feel pain in my heart. I cannot go back because of what they did to me.

VOA: special.2009.10.24

He says his latest album "I Am What I Am" is more personal and a little more from the heart than earlier records.

VOA: special.2010.06.11

I promise that what I have told you today is true C cross my heart.

VOA: special.2010.07.11

However, you might have a change of heart based on what I tell you.

VOA: special.2010.07.11

He was great in 'Crazy Heart.'" "What did you like about 'Crazy Heart'?"

VOA: special.2010.03.01

"As a mother my heart went out to all of them. I cannot imagine what it would feel like to know that your child was in prison, for now 100 days, with very little contact between you and them.

VOA: standard.2009.11.05