myocardial viability study
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Indications
- myocardial perfusion defect at rest*
- wall motion abnormality at rest#
* myocardial perfusion scintigraphy
* dobutamine stress echocardiography
Interpretation
- reperfusion of area after 4-24 hours (with thallium) indicates viable myocardium
- metabolic activity on PET scanning indicates viable myocardium
- improvement in wall motion with low-dose dobutamine & worsening of wall motion with high-dose dobutamine indicates viable myocardium[1]