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[201Tl-reverse redistribution in a case with stunned myocardium]
1Department of Internal Medicine, Mimihara General Hospital.
Kaku Igaku. the Japanese Journal of Nuclear Medicine
|March 1, 1991
Summary
This study discusses a challenging case of myocardial viability diagnosis in stunned myocardium. Early coronary recanalization may explain reverse redistribution findings on thallium scans.
Area of Science:
- Cardiology
- Nuclear Cardiology
- Cardiac Imaging
Background:
- Myocardial viability assessment is crucial for guiding treatment in patients with ischemic heart disease.
- Distinguishing stunned myocardium from irreversible infarction can be challenging.
- Rest-redistribution thallium scintigraphy is a common method for assessing myocardial viability.
Observation:
- A 58-year-old male presented with chest pain and ECG findings of giant negative T waves.
- Echocardiography revealed anterior wall motion abnormality.
- Initial thallium scan showed reverse redistribution in the antero-apical region, complicating viability assessment.
Findings:
- Coronary angiography revealed no significant stenotic lesions.
- Left ventriculography demonstrated improvement in wall motion abnormality in the chronic stage.
- Repeat thallium scan showed resolution of the apical perfusion defect.
Implications:
- Reverse redistribution on thallium scans in stunned myocardium can be misleading.
- Early coronary recanalization is a potential mechanism for these atypical findings.
- This case highlights the importance of integrating multiple imaging modalities and clinical context for accurate myocardial viability assessment.