Table 1

Reproducibility of long axis variables

Coefficient of variation (%)
VariablesIntraobserverInterobserver
Total excursion3.24.0
Shortening during isovolumic relaxation11.515.0
Peak shortening rate4.25.4
Peak lengthening rate5.06.0
Q wave onset of shortening6.57.0
A2 onset of lengthening5.56.0