myocardial Scintigraphy ischemia can deor mc_mstrat_e mfarction. and It has a higrs after onset of an mfarctl has a higrs after onset of an mfarctln and localizeh sensitivity in the first six to.twenty can belabelled pyrophosphate scan becomes four. houuseful in the coronary care umt. The positive trction. Since the pyrophosphate scan 99mTc welve to twenty hours after onset of an becomes infate negative between in old old and infarction fresh it can m/arct1on; dif ferentialso give additional information about it right can aventricular involvement of the mfarction.