"If you had people around you with mobile phones, it really affected how the pacemaker was delivering, so it would really knock it out of sync," he explained. "I wasn't allowed to go on escalators and ...

Surgeons use small prongs to push it into place in the heart. What’s more, the pacemaker monitors the heartbeat and activates only when it needs to. Dr. John Hummel explains: “If it stops for ...