In a Heartbeat is a Disney Channel Original Series inspired by real life EMT squads, the cast consisting of high school students from all over the country. The show premiered in 2000 and ran from 2000-2001. The series follows the lives of several teenagers who volunteer as part-time EMTs while going to school and who try to maintain their lives as normal teenagers. In Canada, the series was aired on Family, while in the United States, it was aired on the Disney Channel. The series is based on Post 53, a real EMT emergency response program run by high school students in Darien, CT.