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Figure 1 Sensitivity and specificity of visual perfusion, reversible regional wall motion abnormality (RWMA) and post-stress RWMA for angiographic stenoses >70% by vascular territory. The overall and vascular territory-specific ability of Tc-99m sestamibi myocardial perfusion single photon emission computed tomography to detect (sensitivity) and exclude (specificity) angiographic stenoses >70% on the basis of a post-stress perfusion defect (summed stress [perfusion] score  4), reversible RWMA (summed difference [perfusion] score for wall motion >2) and post-stress RWMA (summed stress [perfusion] score for wall motion 4) is shown. Vascular territories are defined by specific myocardial segments (see Methods for details) typically supplied by the following coronary arteries: anterior = left anterior descending, septal and diagonal; inferior = right and posterior descending; and lateral = circumflex and obtuse marginal.
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