Figure 20. A, Short-axis and 6, long-axis images of color kinesis layers of uniquely shaded border zones that show build sequentially, providing a phase display of endocardial wall motion.

Figure 21. A-D, Pseudocolor-coding of short-axis images before and after occlusion of the coronary artery. Arrows indicate area of interest. (From Villanueva FS, Glasheen WP, Sklenar J, et al: Successful and reproducible myocardial opacification during two-dimen- sional echocardiography from right heart injection of contrast. Circulation 85:1557-1564, 1992; with permission.)

Figure 22. Apical two-chamber view of a normal human subject with the blood pool demarcated in red by automatic border detection. The manually defined region of interest is shown by the light blue line surrounding the LV. Below the image is a graph of the left ventricular (LV) volume versus time, calculated by the length-area method. End-diastolic and end-systolic volumes and ejection fraction are shown along the right-hand side. The ejection fraction (52%) appears to be depressed artificially because a portion of the atrium is included within the region of interest.