Traditionally we've run at least 2 troponins 6 or 8 hours apart to help rule out MI and recently in algorithms like the HEART score we've combined clinical data with a 2 or 3 hour delta troponin to help rule out MI. The paper we'll be discussing here is a multicentre/multinantional study from the Canadian Medical Association Journal from this year out of Switzerland entitled "Prospective validation of a 1 hour algorithm to rule out and rule in acute myocardial infarction using a high sensitivity cardian troponin T assay" with lead author Tobias Reichlin. It not only looks at whether or not we can rule out MI using a delta troponin at only 1 hour but whether or not we can expedite the ruling in of MI using this protocol.