“In the USA, if there’s any doubt, the dispatcher sends emergency services right away.”
That depends on location. I’m a bradycardiac, which is a person with abnormally low heart rate, typically well below 50 at rest. I woke up early one morning with a rate over 120. I called ER and was told by a woman who could hardly speak English to drink a glass of water and go back to bed.
I called an ER in a nearby city and was told to get to the ER ASAP.
Wow, what a difference in responses!