I didn't have to be revived, so this isn't exactly what you're looking for, but I did have a near-drowning when I was 7 or 8. I was at a water park with a day camp group. My friend challenged me to race across the wave pool--diagonally, from the shallow end right side to the deep end left side. She was a championship swimmer, I was a decent recreational swimmer.
Swimming against the waves was tough. About 3/4 of the way there, in the super-deep water and strongest waves, I totally lost energy. I sank like a stone. Everything went weird and blue, but incredibly tranquil. I didn't have a stereotypical near-death experience, but I felt peaceful and happy. Time got all weird too. I have no idea if I was down for seconds or minutes. Could have been hours for all I knew (obviously that's not possible).
Then my survival instinct kicked in. I had a strong surge of "I am NOT going to die out here." I rocketed to the surface at least twice as strongly as I normally could manage. I propelled myself to the ladder at the side at what felt like hyper-speed. Launched my upper body over the wall and just laid there, half-in half-out of the water, panting and cramping and feeling like I was going to throw up. Eventually I got back enough strength to crawl out of the pool and drag myself to a chair. I didn't feel "right" for another day or two, but no lasting damage.
In hindsight, it's unbelievable that nobody helped me out. It was a crowded wave pool on a summer afternoon with tons of lifeguards. But I was totally on my own.