Eli5: What would be the protocol for the case of an Astronaut suffering a heart attack or similar serious medical condition, (and has it ever happenend before?) on the ISS?

Question

Eli5: What would be the protocol for the case of an Astronaut suffering a heart attack or similar serious medical condition, (and has it ever happenend before?) on the ISS?

In: 1111

Answer 1

Hasn’t ever happened on the ISS, but one of the Apollo 15 astronauts had a cardiac issue on the lunar surface.