Fig. 1From: Impact of pulmonary valve replacement on left and right ventricular function using strain analysis, in children with repaired tetralogy of FallotAccuracy of echo-derived LVEF based on CMR as gold standard. Bland–Altman plot for comparison of LVEF by echocardiography and CMR; mean difference between LVEF derived by echo and MRI = − 0.0152, SD = 0.37, P = 0.043Back to article page