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Figure 2 Example of echocardiographic and scintigraphic images obtained in a patient with collaterals (group A) at baseline, during low dose dobutamine infusion and after revascularization (POST-REV). In the top row, a left ventricular end-systolic frame obtained at echocardiographic study in the four-chamber view is shown. In the bottom row, a set of tomographic slices reconstructed along the short axis from left ventricular apex to base (a d) is shown. The decrease in left ventricular end-systolic dimensions at both dobutamine and postrevascularization echocardiographic studies in comparison with the basal study is visible. The functional changes were associated with an increase in 99mTc-Sestamibi uptake detected at dobutamine scan in the areas of the previous infarction in comparison with basal scan, and confirmed after revascularization.
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