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Figure 1
(A) Baseline rest and dipyridamole (DP)-stress vertical long axis single-photon emission computed tomography (SPECT) images and 10-week follow-up rest images are shown from a patient with anterior myocardial infarction who received thrombolytic therapy. When DP stress is paired with initial rest images there is a fixed perfusion defect in the anteroapical wall. When DP stress in paired with the delayed rest images, SPECT is reclassified as reversible. (B) Rest and post-DP stress myocardial contrast echocardiography images from the apical four-chamber view of the same patient demonstrate an apical-lateral perfusion defect during DP that was not present at rest, indicating reversibility. (C) Angiogram of the patient showing an 84% lesion in the left anterior descending coronary artery. (D) Fractional flow reserve (FFR) tracings showing an FFR of 0.48. QCA = quantitative coronary angiography.
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