I had a patient who checked in the ED for chest pain (felt like indigestion but he was intelligent enough to know it wasn't). Arrested just as we were getting vitals. CPR and shock -> came back awake and asked what happened. EKG after ROSC indicated STEMI. Arrested again, this time we just shocked right away before CPR and he awakened with ROSC. Eventually the cath lab was no longer occupied (this was a small hospital) and he went and got taken care of. Even if he arrested once and awakened it would have been amazing. But twice, I had never seen that in my years working in various emergency departments. That story had a happy ending (or continuation, as life moves on to new seasons), something I don't see very often. Other than that, my experience matches up mostly with yours in that for patients who arrest, happy outcomes are rare. One medic called 911 for his wife who had arrested - luckily he had witnessed it and went straight to the chest while his teammates on duty came to bring her in. I can't remember if they got ROSC or if we did, but she had a fair outcome. She had a long rehab time but was able to live a mostly normal life after that. The ones who just don't have a good ending are too many to count.