Medical Emergencies

Medical emergencies are the majority of guard dispatches in many public and private environments. As the population ages these calls will increase.

Guards at a minimum should have CPR and first aid training. These are certifications available from the American Red Cross.

Beyond this EMT training is very valuable and potentially  life saving. It has helped me save 5 lives.The confidence and patient interaction has helped calm panic situations.

I have used the EMT/Paramedic mnemonics many times to guide me through initial patient assessment in the first -golden- 60 seconds.
This has allowed me among other things, to ensure the right kind of ambulance was dispatched to the scene: BLS vs. ALS ambulances.

Some places will give you slightly more money in your hourly guard wage with an EMT certification, others don't care...you are just a pawn to them after all and EMT training might mean more potential liability to your guard and client firms.

My California EMT training was 5 months of about 12-15 hours a week plus ambulance ride-alongs and hospital ER experience, IIRC. I preferred being a guard however. YMMV.

You may decide you prefer being an EMT to being a Guard. You also generally work with smarter partners! but just as cynical and perhaps as psycho. (See alternate mnemonics) 
However, understand it is an equally thankless job and management is no better; it does garner more respect from the public and a few dollars more per hour, OTOH, there are alot fewer EMT jobs than guard jobs.

Saving lives is what we are about and medical emergencies gives us a chance to do it right and visibly.