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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Am Soc Echocardiogr. 2011 Sep 9;24(11):1276–1284.e5. doi: 10.1016/j.echo.2011.08.002

Figure 1. Measuring circumferential carotid arterial strain using speckle-tracking.

Figure 1

Contour generated after manual marking of intima-luminal border of the right distal common carotid artery (A). Strain values depicted by software system over 3 cardiac cycles (B). The top graph shows the change in circumferential strain over time at each of the 48 points along a closed loop contour. The graph below it illustrates a color map representation, with each of the 48 points represented on the y-axis; time, on the x-axis; red, positive strain values; and blue, negative values.