Figure 9: Deviation of tricuspid annular plane systolic excursion (TAPSE) values in tetralogy of Fallot (TOF) patients from reference values versus years following surgical repair. The TAPSE value data points are given as black dots. Shown is the absolute deviation of the measured TAPSE values of TOF patients compared to TAPSE reference values. The difference of TAPSE values is expressed in centimetre (cm). The black solid line is an interpolation for a linear trend for the TOF patients.