Review Note

Last Update: 05/01/2023 12:01 PM

Current Deck: Ankore 2E::07 Cardiac Imaging::01 Nuclear cardiology

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Cardiac Imaging: Nuclear Cardiology

Unlike thallium, Tc-99m sestamibi (Cardiolite) does not undergo {{c1::redistribution}} and remains fixed in the myocardium.
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Thallium undergoes redistribution with simultaneous cellular washout and re-extraction of blood-pool radiotracer. Only viable myocardium can extract thallium. Therefore, ischemic but viable myocardium will show perfusion defect during stress due to decreased blood flow, but normalization of defect on post-redistribution images. In contrast, an infarct or scar will show a persistent defect.
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