Table 3.
Dynamic changes of injured and remote myocardium within the first week following STEMI
| Studied myocardium | Reperfusion time | Pairwise comparison (P value) | ||||
|---|---|---|---|---|---|---|
| < 3 h | 24 h | 6 days | A* | B* | C* | |
| T1 relaxation time (inc core) (b)ms | 1404 ± 76 | 1345 ± 49 | 1384 ± 77 | < 0.001 | 0.81 | 0.046 |
| T1 relaxation time (remote) (b) ms | 1189 ± 16 | 1182 ± 27 | 1181 ± 19 | 0.14 | 0.004 | 1.0 |
| T1 relaxation time (exc core) (b)ms | 1406 ± 71 | 1353 ± 55 | 1398 ± 67 | < 0.001 | 1.0 | 0.001 |
| Injured myocardium (AAR, LV %) on T1 map(b) | 37 ± 11 | 38 ± 11 | 42 ± 9 | 1.0 | 0.001 | 0.019 |
| T1 core area(b) (mm2) | 0.15 ± 1.14 | 1.1 ± 1.14 | 0.84 ± 1.15 | < 0.001 | 0.028 | 0.99 |
| T1 core prevalence(c), a | 4 (13%) | 15 (50%) | 9 (41%) | – | – | – |
aP value is not presented because generalised linear mixed-effects model does not support analysis for categorical data. Data are presented as (b) mean ± SD, (c) total number and proportion. * A (comparison between < 3 & 24 h), B (comparison between < 3 h & 6 days), and C (comparison between 24 h & 6 days)