In a Heartbeat was a Disney Channel TV show. The show was inspired by real life emergency medical technician (EMT) squads. Their staff members were high school students from all over the United States. The show followed the lives of several teenagers. They volunteered as part-time EMTs while going to school. They also try to maintain their lives as normal teenagers. In Canada, the show was on the Family Channel. The show is based on Post 53. Post 53 is a real EMT emergency response program run by high school students in Darien, Connecticut.