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.

Her heart beat a little faster as she opened the case and picked up the pistol.

Her heart beat a little faster as she remembered his bold stare.

Your heart beats faster to carry blood to where it's needed.

My heart was back to beating faster than it should have.

Jess's heart began to beat a little faster as it always did when the subject was business.

Her heart was beating faster than the short dash warranted.

His heart began to beat faster but he tried to control his excitement.

My own heart is beating faster than I would have expected it to.

The heart beats faster to pump enough blood to the body.

His heart beat a little faster as he sauntered up the steps.