Table 1.

Patient Characteristics on Initial CMR

	Group 1 (n = 84)	Group 2 (n = 43)	p-value
Male	41 (48.8%)	26 (60.5%)	0.261
Age at repair (years)	0.7 (0.3, 5.0)	0.5 (0.3, 2.9)	0.507
Type of repair			0.184
Valve sparing	15 (18.9%)	2 (4.7%)
Transannular patch	52 (61.9%)	33 (76.7%)
RV-to-PA conduit	7 (8.3%)	3 (7.0%)
Unknown	10 (11.9%)	5 (11.6%)
Time since repair (years)	18.9 (13.3, 27.0)	14.8 (12.7, 27.8)	0.179
Age at first CMR, years	20.4 (13.2, 34.2)	15.6 (13.0, 28.7)	0.164
Age at last CMR, years	25.6 (17.8, 39.6)	19.9 (12.6, 31.8)	0.067
Type of intervention between CMRs			N/A
Surgical pulmonary valve replacement	N/A	37 (86%)
Transcatheter pulmonary valve replacement	N/A	6 (14%)

Variables are expressed as either frequency (%) or median (interquartile range). Group 1—patients with no interventions between serial CMRs; Group 2—patients with transcatheter or surgical interventions between CMRs. CMR cardiovascular magnetic resonance; RV-to-PA right ventricle to pulmonary artery. N/A not applicable