JACKSON, TN (WNBJ) - In Madison County, a local fire department held a press conference today about a new initiative geared towards improving the survival rates of patients suffering a sudden cardiac arrest. For World Heart Day, the Jackson Fire Department hosted a press conference this morning to introduce the 4-Minute City Program and the future deployment of AED units. A 4-Minute City is a mass strategic deployment of “smart connected” AEDs or automated external defibrilla