I wonder the same thing, I wrote the story of my dad collapsing on a jogging path when there was seemingly nothing wrong with him.  The person who tried to do CPR on him until the ambulance came to the funeral and it turned out that my dad collapsed almost an hour before anyone had got to him, so I always wonder if something could have been done.  My head is still so foggy over it and it has been 7 months, I'm not sure how long it will take before my mind finally comprehends what happened.

My dad got to my mother around 10-15 minutes after he heard what he thought was a backpack dropping, then snoring from the next room. She was an alcoholic he thought she passed out he went to move her off the floor she was foaming from the mouth a bit and wasn't breating. ...He called 911 he did CPR and compressions until the ambulance came 10 minutes later. My mom went without oxygen for about 20 minutes. Why didn't the ambulance have a defib or any modern techonology? Why why why????????????????? Well my mom had a pulse when she arived in emergency, so they  had to put her on life support. I flew from Seattle to Las Vegas the next day and walked that dreadful path to emergency that  changed my life forever. My mom was not there...she didn't move and there was no brain activity. Her chest was moving up and down, she was bleeding from the mouth a tiny bit.  20 minutes is too long to go without oxygen. You need to get to them within 4-6 minutes. My dad feels sooooooooooooooooo guilty. I sent him packets of info to let him know he did all he could. One hour was too long so was 30 minutes and 20, they wouldn't want to live brain dead ....I am sure you know that. We pulled the plugs on my mom a day and a half later after she was an organ donor. The donor wrote me really quick thanking my family and telling me it was a miracle 99.9%  chance she would be on dialysis forever. She waited 14 years for my mothers kidney. Like I said in the previous post..message me if you need. I know how you fee, it's just fresher for me. My mom suffered cardiac arrest on 3-30 she passed on April 1st around 5pm. It was so hurtful she had a plane ticket for spring break to leave Vegas on the very day she died April 1st at around 5pm to visit me in Seattle, this is so terrible. I never knew what I had until it was gone...my dad is devistated. I have 3 children that lost their mother....I worry about myself...am I going to just exit in that manner?

http://www.ireport.com/docs/DOC-14636

April