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Table 3 CMR Characteristics

From: Relationship between CMR-derived parameters of ischemia/reperfusion injury and the timing of CMR after reperfused ST-segment elevation myocardial infarction

Characteristics Overall
(n = 163)
Tertile-1
(n = 54)
Tertile-2
(n = 55)
Tertile-3
(n = 54)
P-Value
For trend
Infarct-related Measures
AAR (g) 23 ± 12 20 ± 12 23 ± 11 25 ± 13 0.113
AAR (% LV) 18 ± 8 17 ± 9 19 ± 9 18 ± 8 0.385
IMH n, (%) 46 (28) 12 (22) 17 (31) 17 (31) 0.487
IMH extent (g) 2.8 (1.6–5.4) 2.8 (1.5–9.2) 3.0 (2.1–4.8)8 2.4 (1.1–5.4) 0.794
IMH extent (% of LV) 2.0 (1.0–4.1) 2.7 (1.0–7.2) 2.4 (1.3–3.9) 1.9 (0.8–3.9)1 0.681
Infarct size (g) 16 ± 13 15 ± 12 16 ± 12 19 ± 14 0.271
Infarct size (% of LV) 13 ± 9 12 ± 9 12 ± 9 14 ± 9 0.646
MVO n, (%) 73 (45) 23 (43) 25 (46) 25 (46) 0.921
MVO extent (g) 4.0 (2.3–7.9) 3.0 (2.0–4.2) 5.6 (3.0–7.8) 5.0 (2.3–11.4) 0.294
MVO extent
(% of LV)
3.8 (1.8–6.9) 2.5 (1.5–4.5) 4.4 (2.0–6.9) 3.8 (1.9–8.0) 0.426
MSI (%) 31 (7–55) 24(8–48) 36 (8–58) 26 (1–51) 0.258
LV functional Parameters
LV-EDVi (ml/m2) 75 ± 19 71 ± 17 75 ± 18 80 ± 21 0.042
LV-ESVi (ml/m2) 35 ± 19 33 ± 13 34 ± 18 40 ± 22 0.068
LV-EF (%) 50 ± 12 51 ± 11 52 ± 11 48 ± 15 0.198
LV-Mi (g/m2) 66 ± 15 63 ± 15 67 ± 15 69 ± 15 0.129
RelaxationTimes
T2-mapping
T2 infarct (ms) 62.8 ± 6.4 60.0 ± 4.9†• 63.5 ± 5.6• 64.8 ± 7.5† < 0.001
T2 remote (ms) 45.5 ± 3.0 44.3 ± 2.8•* 46.1 ± 2.8• 46.1 ± 3.0* 0.001
T2 infarct core (ms) 47.0
(44.9–50.0)
47.5
(46.0–49.7)
45.8
(42.6–48.5)
48.0
(45.8–50.6)
0.071
T1-mapping*
T1 infarct (ms)* 1220 ± 81 1172 ± 63†• 1235 ± 78• 1248 ± 82† < 0.001
T1 remote (ms)* 1019 ± 59 1004 ± 37 1019 ± 54 1034 ± 76 0.076
ECV infarct (%)** 46.7 (41.5–52.0) 49.0 (41.6–53.1) 45.6 (41.7–52.9) 45.9 (40.1–49.5) 0.470
ECV remote (%)** 24.5 (22.1–27.1) 25.2 (22.0–27.0) 23.9 (22.3–25.7) 24.6 (22.0–28.3) 0.916
  1. * n = 124; **n = 68. Bonferroni’s post-hoc analysis: •,* P < 0.05; † P < 0.001. AAR area at risk, ECV extracellular volume, EDVi end-diastolic volume index, EF ejection-fraction, ESVi end-systolic volume index, IMH intramyocardial hemorrhage, LV left ventricular, Mi mass index, MVO microvascular obstruction, MSI myocardial salvage index