A pacemaker is a small, battery-powered device that controls the heartbeat. Our heartbeats are controlled by a highly efficient, biological electrical system that ensures our heart steadily pumps ...

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Dear Dr. Donohue o My wife is 85 and is scheduled to have a pacemaker put in. I wasn't aware that she had heart trouble. Is a ...