A blast from the past: interpreting Tc99m-PYP results in context of acute coronary syndromes.

This article focuses on the diagnostic evaluation of an 80-year-old man presenting with acute coronary syndrome characterized by proximal left anterior descending artery occlusion and anterior ST-segment elevations. Imaging revealed increased myocardial wall thickness and Tc99m-PYP (technetium-99m pyrophosphate) uptake in the infarcted myocardium, highlighting that Tc99m-PYP, originally used to detect acute myocardial infarction, can show tracer uptake in infarcted tissue and should be interpreted cautiously when assessing for transthyretin cardiac amyloidosis. The patient received stenting and medical therapy and was scheduled for further revascularization without treatment for amyloidosis. The report emphasizes the importance of contextual interpretation of Tc99m-PYP imaging in acute myocardial infarction cases.