What happens if a person can't die of a heart attack? What would happen if a person wasn't able to die of a heart attack since they use a pacemaker or are connected to medical equipment that pumps blood for them?

This can create some sub-questions, if people couldn't die of a heart attack such as:


What would happen if the cause of death specified was impossible, so the person had to die of a heart attack?
What would happen if no cause of death was specified?
Mayo clinic defines heart attack as an obstruction of blood flow to the heart muscle, causing the body's natural blood pump to fail and/or die.

So a pacemaker won't save one from a heart failure once it happens, the device avoids them from happening (the real function is more complex, gugure kokkuri-san!).

Since a heart attack is a failure of the blood pump, it is safe to assume that a DN could make an artificial heart to fail as well.