She could feel her heart going nineteen to the dozen.

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

Did you put your hand inside and feel his heart?

She felt his heart against her back, strong and slow.

He felt his heart working too quickly and protesting it.

I could feel her heart beating against my arm way too fast.

She felt his heart, the steady beat of it, against her back.

It had been close there and he still felt his heart pumping hard from the effort.

Now I can feel my heart, all right, she thought.

He felt his heart pounding, knowing what had to come next.