Never had the misfortune to have anything like that , but my
Mate had a customer with an elpitic fit, as the guy was in the door way, he just stepped over the man and carried on working, he quite rightly pointed out if he didn’t his boss would have been upset as how do you invoice for medical repairs
When covered by the NHS.
As for modern heart surgery, routine as fitting a turbo charger to anything with a HDI 16 engine or heater motor in a corsa/punto!