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Figure 5 Proportion of segments in which the results of thallium single-photon emission computed tomography (Tl-SPECT) and dobutamine echocardiography (DbE) were concordant (viable by both tests or nonviable by both tests) in each category of transmural extent of scar (TES). The overall concordance between Tl-SPECT and DbE is similar in each category of TES, increasing with TES >75%. Most segments that are viable by DbE are viable by Tl-SPECT when there is no scar (i.e., TES 0%), with more discrepancies as TES increases (p = 0.03). Segments that are nonviable by DbE show increasing concordance with increasing TES (p < 0.0001).
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