Figure 3From: Echocardiographic quantification of myocardial function using tissue deformation imaging, a guide to image acquisition and analysis using tissue Doppler and speckle tracking Example of longitudinal strain graph (Doppler derived). Longitudinal strain derived from tissue Doppler data in the interventricular septum in a healthy person. Y-axis represents strain (%), X-axis represents time (one cardiac cycle). Blue lines represent cardiac events: (MVC) mitral valve closure and (MVO) opening, and (AVC) aortic valve opening and (AVC) closure.Back to article page