Table 1.

Patient Characteristics at Diagnosis

Characteristic	Newly Diagnosed (n = 17)	Previously Diagnosed (n = 11; 11/12 With Complete Data)	P Value
Age at diagnosis (y)	1.33 (0.63–12)	0.83 (0.12–4.1)	.16
Time from symptoms to diagnosis (d)	9.7 ± 8.9	6.7 ± 5.8	.54
Symptoms before diagnosis  Respiratory or gastrointestinal prodrome	13 (76%)	10 (91%)	.301
Chest pain	5 (29%)	0	.069
Cadiogenic shock	1 (6%)	3 (27%)	.141
Inotropic support	10 (59%)	11 (100%)	.025*
Ventilator support	6 (35%)	9 (82%)	.028*
Mechanical circulatory support	4 (24%)	6 (55%)	.008*
Treatment with IVIG	6 (35%)	8 (73%)	.076
Treatment with steroids	1 (6%)	6 (55%)	.008*
Echocardiogram at diagnosis  Initial LV SF z-score	−9.1 (−15.5 to −2.6)	−10.9 (−14.2 to −5)	.46
LVEDd (z-score)	5 (0.88–9.3)	2.6 (−0.48–5.1)	.22
LVESd (z-score)	7.9 (1.7–14.6)	6.1 (0.62–9.9)	.57

Values are presented as median (interquartile range), mean ± SD, or n (%). IVIG, intravenous immunoglobulin; LVEDd, left ventricular end-diastolic dimension; LVESd, left ventricular end-systolic dimension.

^*P < .05.