Did I do the right thing?

I just can't stop thinking about our greeter and the fact I think he had a heart attack. Did I do the right thing when I called management to take over? Should I have called an ambulance instead? Should I have stayed at the store? Did I do the right thing by leaving the store and leaving others to take care of matters?

Sleep will be non-existent for a while. I am really worried about what happened to him.