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Table 3 Dynamic changes of injured and remote myocardium within the first week following STEMI

From: Dynamic changes in injured myocardium, very early after acute myocardial infarction, quantified using T1 mapping cardiovascular magnetic resonance

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%)
  1. 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)