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  • Title: False-positive Tc-99m sestamibi SPECT in a patient with left bundle branch block.
    Author: Campeau RJ, Garcia OM, Colon R, Agusala M, Correa OA.
    Journal: Clin Nucl Med; 1993 Jan; 18(1):40-2. PubMed ID: 8422718.
    Abstract:
    A 37-year-old man with atypical chest pain and complete left bundle branch block showed a marked exercise induced septal defect on Tc-99m sestamibi stress testing. A repeat examination at rest the next day revealed complete reversal of the previous septal defect. Coronary angiography two days later showed a normal coronary artery system. Left bundle branch block has been associated with false-positive results of exercise (and more recently, dipyridamole) TI-201 examinations for septal ischemia. The case presented here may be the first reported example of a false positive Tc-99m sestamibi examination for septal ischemia in the presence of left bundle block.
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