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Increased 201Tl uptake by the chest wall following cardioversion
K Minamiji1, M Sunako, M Fujino
1Department of Cardiology, Himeji Cardiovascular Center, Japan.
European Journal of Nuclear Medicine
|January 1, 1988
Summary
Increased thallium-201 (201Tl) uptake in the anterior chest wall after cardioversion mimicked lung uptake in an acute inferior infarct patient. This accumulation site correlated with technetium-99m pyrophosphate (99mTc-PYP) uptake.
Area of Science:
- Nuclear medicine
- Cardiology
- Diagnostic imaging
Background:
- Acute myocardial infarction diagnosis often involves nuclear imaging tracers.
- Thallium-201 (201Tl) is commonly used to assess myocardial perfusion.
- Cardioversion is a procedure to restore normal heart rhythm.
Observation:
- A patient with acute inferior myocardial infarction presented with unusual 201Tl uptake.
- This increased uptake was observed in the anterior chest wall following cardioversion.
- The uptake pattern mimicked increased lung uptake of the tracer.
Findings:
- The anterior chest wall 201Tl accumulation site corresponded precisely to the location of 99mTc-pyrophosphate (PYP) uptake.
- Right-sided heart catheterization revealed nearly normal hemodynamic data in the patient.
- This suggests the 201Tl uptake was not related to pulmonary issues but potentially to myocardial damage or inflammation.
Implications:
- This case highlights a potential imaging artifact in 201Tl scintigraphy after cardioversion.
- Understanding such mimics is crucial for accurate interpretation of myocardial perfusion scans.
- Clinicians should consider recent procedures like cardioversion when interpreting unexpected tracer uptake patterns.