One day I received a letter which made my heart beat fast.

She sat up in bed with her heart beating really fast.

He didn't know why this made his heart beat just a bit faster.

She turned away suddenly and all at once I felt my heart beating fast.

He looked at it, and his heart was beating fast.

"What I like about the track is that it makes your heart beat fast."

The effort of the walk made their hearts beat fast.

When at last she pulled away her heart was beating fast.

I got down to the job again with my heart beating faster.

She turned toward him again, her heart suddenly beating faster.

He didn't know why this made his heart beat just a bit faster.

I got down to the job again with my heart beating faster.

She turned toward him again, her heart suddenly beating faster.

His heart started to beat a little faster; what was behind the doors?

His heart began to beat faster, and fear rose in him like a forest fire.

Your heart is beating very fast or you have chest pain.

His heart was beating so hard and fast that it hurt.

His heart was beating fast and he tried to calm himself.

As he stared his heart began to beat faster, but this time not from fear.

His heart began to beat faster at the thought of home and Pam.