a major medical break through that could be life saving. a blood test that might predict if you're at high risk of a heart attack before it happens. dr. david samati joins us the vice chair of department at mount sinai. a blood test? >> yes, this is a simple blood test, an exciting news coming out of scrips in california. and before we got to this test, i want to tell you exactly what happens if someone is having a heart attack. you have the blood that's circulating through a blood vessel and first thing that happens the actual vessel there is he' some sort of break down or erosion in the wall of the vessel. what that does, brings a lot of inflammatory cells and some other cells that get to in the blood called circulating cec. the simple blood test it based on the fact it can detect these cells, so this is a revolutionary thing at this point two weeks before having a heart attack, you can get a