What should be done immediately if a co-worker is unconscious and not breathing after an electric shock?

Starting artificial respiration is the appropriate immediate action when a co-worker is unconscious and not breathing after experiencing an electric shock. In such situations, ensuring that the individual receives adequate airflow is crucial, as they cannot breathe on their own. While other actions could be important, like calling for help or checking for a pulse, initiating artificial respiration takes precedence to provide oxygen to the person's body and maintain vital functions.

Electric shock can disrupt normal heart rhythms and cause respiratory arrest, so beginning artificial respiration can help preserve brain function and potentially save the person's life until emergency medical services arrive. It's also important to follow guidelines on the proper technique for artificial respiration to maximize effectiveness.