I was taken to the Sanatorio Trinidad with a ruptured appendix a few years ago. I have never encountered - or even heard of - comparably great care at any hospital in the US. Three doctors met the ambulance when we arrived at the guardia, and I had a dedicated team working on me through the night.
The facilities are top-rate, the staff is skilled, knowledgeable, caring, and available. Example: when I was taken to my room, my primary nurse welcomed me and apologized that she might not be able to respond to me immediately because she had 3 other patients to care for!
After that experience, I stopped worrying about Argentine health care. When I travel to North America these days, I buy a cheap traveler's policy that would cover stabilizing me in an emergency situation and then getting me as quickly as possible back here, where I can get better care that I would find anywhere in the US.