Blood tests could identify heart attack and stroke

Is this one any better than these sixteen? 
Why are we reinventing the wheel?
http://www.newsfix.ca/2013/05/07/blood-tests-could-identify-heart-attack-and-stroke/
A lab test that can tell straightway if someone is really having a heart attack or a stroke is being developed.
Presently, it is hard to be sure when someone is having a heart attack or a stroke. The doctor relies on the patient’s medical history and lab tests that may take hours to complete. This wastes valuable time when the patient could be having life-saving treatment.
Researchers at the University of Maryland Medical School are looking at tests for a substance called nourin, which is released from heart tissue as soon as it becomes damaged during a heart attack. This is the earliest biological signal that something is wrong and its identification would give the patient the best chance of medical interventions that would save his or her life.
The same team is also looking at biochemical markers for the onset of stroke. Currently, there is no specific clinical test for stroke – so the introduction of a valid diagnostic would be a great advance.