myocardial infarct imagingmedical dictionary

<radiology> Tc-99m pyrophosphate (PYP) 20 mCi, peak abnormality 2-3 days, often falsely negative before 2 days, abnormal for 7-10 days, mechanism: calcium influx into ischaemic cells, PYP incorporated into crystalline structure, analogous to hydroxyapatite see: nuclear cardiology

(12 Dec 1998)