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Figure 1 Bar histograms comparing echocardiographic (top) and scintigraphic results (bottom) at baseline, during low dose dobutamine infusion and postoperatively (POST-REV), in patients with (group A) and without (group B) collaterals. The lack of significant changes in myocardial 99mTc-Sestamibi uptake after dobutamine infusion in patients without collaterals is clearly visible, in spite of a recovery of both function and perfusion detected after revascularization.
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