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

Table 1 Clinical characteristics of recruited patients stratified by average T1 values within the area at risk (AAR) at 3 h after primary percutaneous coronary intervention (PPCI)

Clinical characteristics	Whole cohort	AAR with average T1 value (< 1400 ms) (n = 24)	AAR with average T1 value (≥1400 ms) (n = 15)	P value
Age^a	62 ± 11	61 ± 12	62 ± 10	0.88
Male gender^b	32 (82)	18 (75)	14 (93)	0.22
Body Surface Area^a	2.06 ± 0.20	2.04 ± 0.19	2.10 ± 0.22	0.35
Hypertension^b	15 (38)	11 (46)	4 (27)	0.23
Dyslipidaemia^b	12 (31)	8 (33)	4 (26)	0.66
Active smoking^b	13 (33)	8 (33)	5 (33)	1.00
Diabetes^b	3 (8)	3 (13)	0	0.27
Ischaemia time (mins)^c	183 (153–301)	166 (148–269)	229 (182–352)	0.09
Door-to-balloon time (mins)^c	27 (18–43)	24 (14–38)	31 (24–66)	0.16
Systolic pressure (mmHg)^a	126 ± 27	130 ± 25	118 ± 29	0.19
Diastolic pressure (mmHg)^a	73 ± 16	73 ± 15	73 ± 18	0.93
Anterior infarct^b	11 (28)	5 (21)	6 (40)	0.20
Number of diseased vessels^c	1 (1–2)	1 (1–2)	1 (1–2)	0.94
Bystander disease^b	15 (38%)	9 (38%)	6 (40%)	0.88
Large thrombus burden^b	18 (46%)	10 (42%)	8 (53%)	0.48
Thrombectomy use^b	22 (56)	14 (58)	8 (53)	0.76
GP IIb/IIIa^b	6 (27)	3 (13)	3 (20)	0.66
Stent length (mm)^a	31 ± 13	34 ± 15	26 ± 8	0.07
Stent diameter (mm)^c	3.5 (3.0–4.0)	3.5 (3.1–4.0)	3.5 (3.0–4.0)	0.24
Final TIMI III flow^b	28 (72)	19 (79)	9 (60)	0.20
MBG 2/3^b	24 (62%)	16 (67%)	8 (53%)	0.41
Time to CMR (mins)^a	122 ± 55	120 ± 58	125 ± 51	0.79
ST resolution^b	9 (23%)	5 (21%)	4 (27%)	0.67

Large thrombus burden was defined thrombus score ≥ 4. There was no difference in baseline clinical and procedural characteristics in those with or without 6 months follow up
^a(mean ± SD), ^b(n, %), ^c (median, IQR)

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