Hyper-acute cardiovascular magnetic resonance T1 mapping predicts infarct characteristics in patients with ST elevation myocardial infarction

Table 2 Acute (24 h) CMR characteristics stratified by average T1 values within the AAR at 3 h after PPCI

Acute CMR characteristics	Whole cohort	AAR with average T1 value (< 1400 ms) (n = 17)	AAR with average T1 value (≥ 1400 ms) (n = 13)	P value
LV end diastolic volume (ml)^b	168 ± 35	154 ± 34	184 ± 30	0.021
LV end systolic volume (ml)^b	89 ± 31	80 ± 33	99 ± 26	0.103
LV ejection fraction (%)^b	48 ± 10	49 ± 11	46 ± 10	0.442
Area at risk (%)^b	40 ± 12	34 ± 6	48 ± 12	0.002
LGE myocardium (%)^b	25 ± 14	18 ± 10	33 ± 14	0.003
MVO incidence^{a, c}	17 (61)	6 (40)	11 (85)	0.016
MVO extent (%)^d	1 (0–6.5)	0 (0–3.0)	4.0 (0.5–9.5)	0.025
IMH incidence^{a, c}	15 (54)	6 (40)	9 (69)	0.122
IMH extent (mm²)^d	0.76 (0–2.03)	0 (0–1.40)	0.76 (0–4.21)	0.152

IMH Intramyocardial haemorrhage, LGE Late gadolinium enhancement, LV Left ventricular, MVO Microvascular obstruction
^aTwo patients with poor LGE and T2* mapping images were excluded from the analysis. ^b(mean ± SD), ^c(n, %), ^d(median, IQR)

ISSN: 1532-429X