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Figure 3 Profiles of Radial Myocardial Velocity
Profiles of radial velocity from peak R on the electrocardiogram throughout 1 cardiac cycle in the same dog as shown in Figures 1 and 2. Positive values represent inward wall motion and negative values represent outward wall motion. Yellow and orange velocity profiles are derived from the risk area and the normal perfused area, respectively. Although peak systolic radial velocity (VSYS) in the risk area decreased during occlusion, it did not change during stenosis. In contrast, radial velocity at mitral valve opening (VMVO) gradually increased in proportion to the severity of ischemia. AVC = aortic valve closure; MVO = mitral valve opening.
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