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It has the possibility of dramatically increasing a patients odds of survival. >> if you had any problems with chest discomfort... >> reporter: elizabeth is a heart attack survivor. >> passed out at home, and they took me right in... >> reporter: according to the national institutes of health, roughly 1 million americans have heart attacks every year, and, only a little more than half survive. >> once an artery closes you have 45 minutes before the muscle tissue is irreversibly damaged. >> repor...