Unfortunately, there aren't any tests that could be run at the wrist that would be even remotely specific for an MI. Really the only thing I can think of is so

Unfortunately, there aren't any tests that could be run at the wrist that would be even remotely specific for an MI. Really the only thing I can think of is some sort of transcutaneous monitoring of troponin levels in the blood, but that's hard to do (without needles) and a late indicator... troponin levels don't start rising for a few hours after the damage has started.