Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1476-7120-7-29/MediaObjects/12947_2009_Article_276_Fig1_HTML.jpg)
Typical LV longitudinal myocardial velocity curves (top) obtained with colour TD from the basal segment of septum ( insertion ). Integration of the velocity curves over time yielded the corresponding longitudinal myocardial displacement curves (bottom). Isovolumic contraction time (IVCT) and isovolumic relaxation time (IVRT) are indicated.