Most of the countries accept the test results done in your country without making any other tests before an operation.
In Cuba, besides the test results that you will supply, you will also undergo a complete series of pre-operative tests, and this is for your own safety, before the operation.

In most countries, your post operative stay does not exceed 2 days.

In Cuba the stay is from 3 to 10 days at the medical establishment depending on the care you are receiving.