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Figure 1 Measurements of contrast intensity (CI) in the left ventricular (LV) myocardium and adjacent LV cavity on the myocardial contrast echocardiography (MCE) image. The LV myocardium was divided into six segments in each apical four- and two-chamber view (left). As shown in an HPD image of the apical four-chamber view (right), for example, the ROIs (12 blue ovoid shapes in the image) were placed in each segment and each adjacent LV cavity. See text for details. Myocardial segments: AA = apical anterior; AI = apical inferior; AL = apical lateral; AS = apical septum; BA = basal anterior; BI = basal inferior; BL = basal lateral; BS = basal septum; MA = mid-anterior; MI = mid-inferior; ML = mid lateral; MS = mid-septum.