11.   Her heart began to race as she rehearsed what she was going to say.

12.   His smile held such magnetism that her breath caught in her throat and her heart began to race.

13.   As Ashley glanced questioningly at him, her heart began to thump.

14.   Her heart began a slow, heavy pounding.

15.   Her heart began to beat faster.

16.   As he quickly broke eye contact, he felt his mouth go dry and his heart began beating faster.

17.   As the heart begins to fail, it changes shape in a process called remodeling, and heart cells change their structure and the kind of proteins they make.

18.   A doctor pronounces him dead, but a few hours later his heart begins to beat again.

19.   But when he took a drink of water, he said his heart began beating irregularly.

20.   His heart began hammering, Zamarripa said.