Table 3.

Characteristics by myocardial categorization

Characteristic	Normal (n = 3)	High T1 (n = 12)	Fibrosis (n = 21)	Edema (n = 10)	Fat (n = 1)	Fibrofatty (n = 2)
Age (years)	11.5 [8.5–14.3]	11.7 [9.8–14.7]	11.0 [9.6–15.0]	14.6 [12.0–21.4]	14.0	18.5 [17.8–19.1]
Weight (kg)	57.0 [33.2–66.5]	47.9 [40.2–70.1]	42.7 [30.5–52.3]	52.6 [38.1–82.7]	73.2	76.6 [64.5–88.6]
Steroid use at CMR1	3 (100%)	11 (92%)	12 (57%)	4 (40%)	0 (0%)	1 (50%)
LV Ejection Fraction (%)	66 [64–67]	60 [59–62]	59 [55–61]	55 [49–57]	68	36 [24–48]
LGE present	1 (33%)	5 (42%)	14 (67%)	9 (90%)	0 (0%)	2 (100%)
LGE (%)	9.77	12.5 [9.3–25.1]	30.2 [19.5–36.4]	28.2 [24.1–38.6]	–	44.7 [28.0–61.4]
Basal strain	− 17.2 [ − 19.1, − 15.0]	− 13.6 [− 15.7, − 12.6]	− 13.4 [− 15.8, − 12.4]	− 13.6 [− 16.1, − 10.6]	− 13.3	− 8.9 [− 12.1, − 5.6]
Mid strain (%)	− 18.6 [− 18.8, − 17.3]	− 16.7 [− 18.6, − 13.6]	− 14.6 [− 16.9, − 13.0]	− 14.7 [− 16.8, − 11.3]	− 15.5	− 8.5 [− 13.1, − 3.9]
Apical strain (%)	− 18.6 [− 19.7, − 18.1]	− 17.6 [18.9, − 14.6]	− 16.2 [− 18.0, − 13.5]	− 15.9 [− 19.2, − 12.3]	− 14.7	− 9.7 [− 15.2, − 4.2]

Characteristics based on proposed myocardial categorization at the time of first CMR. Continuous variables presented as median [IQR]; categorical variables presented as number (%). CMR1, first cardiac MRI; ECV, extracellular volume fraction; LGE, late gadolinium enhancement; LV, left ventricle