Torti, don’t assume that if you need to return to Canada in case of emergency that you won’t be able to. The key is to be prepared. Making certain that the hospital has your contact information is a good start, but try to identify someone who speaks Spanish that would be able to phone you at your hotel.
For example, a family member of a close friend (who was vacationing in Cuba last winter) passed away unexpectedly here in Canada. I telephoned the resort and explained the situation. They tracked down my friend immediately, and she phoned back within 30 minutes. We were able to arrange for her to return to Canada on a flight that was leaving that night.
Luckily, she had travel insurance, which covered all of her financial costs.
On another occasion, I gave up my seat back to Canada for someone who needed to return urgently (spouse passed away in Varadero). (The tour operator ‘rewarded’ me with five additional days at the Blau Varadero, plus some travel vouchers.)
So, it does happen … but being prepared is key. Hopefully, you have purchased travel insurance?