Follow-up aortic dilatation in patients with repaired tetralogy of Fallot using cardiovascular magnetic resonance

•Most repaired adolescents with TOF have significant aortic dilatation.•Mild increase aortic size with regression of aortic growth index are common.•Aortic growth among adolescents is a part of physiologic growth.•Aortic growth does not produce adverse effect on aortic regurgitation.•Severity of initial aortic size is not a predictor for the rate of aortic growth.