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Figure 3 Echocardiograms during specific interventions in a representative experiment. End-diastolic echocardiographic images of the anterior half of the left ventricle in short-axis are shown. Upper left: Precontrast, prior to contrast injection; upper right: Baseline, after contrast injection; middle left: Vasodilation, during pharmacological vasodilation; Middle right: NFLS + Vasodilation, a non-flow-limiting LAD stenosis at rest in conjunction with pharmacological vasodilation; lower left: FLS, a flow limiting stenosis that reduces coronary blood flow by 50% at rest; lower right: Total Occ; total occlusion of the LAD. Arrows depict the border between the LAD and LCx region. LAD = left anterior descending coronary artery; LCx = left circumflex coronary artery.
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