Time elapsed after contrast injection is crucial to determine infarct transmurality and myocardial functional recovery after an acute myocardial infarction

Table 4 Variation of CMR variables at follow-up in patients with a transmurality index > 75% (in the acute CMR) at different minutes post-contrast

Time	N	Δ WMSI	Δ Num segments	Δ EDV (%)	Δ ESV (%)	Δ EF (%)
1 min	18 (30%)¹	2.90 ± 3.60	2.30 ± 2.21	12.73 ± 21.99	13.21 ± 43.06	−4.48 ± 31.23
3 min	24 (40%)¹	4.93 ± 4.68	4.90 ± 2.56	9.87 ± 22.78	3.44 ± 40.08	3.48 ± 28.79
5 min	17 (28.33%)¹	4.20 ± 3.01	4.80 ± 1.85	15.67 ± 22.55	15.84 ± 45.52	−0.47 ± 33.72
7 min	17 (28.33%)¹	4.12 ± 4.36	4.55 ± 2.31	14.01 ± 28.71	14.79 ± 44.85	−2.59 ± 33.49
10 min	15 (25%)¹	4.00 ± 4.78	4.25 ± 2.76	14.64 ± 25.56	11.08 ± 40.57	−2.01 ± 33.66
15 min	13 (21.67%)¹	3.60 ± 5.03	3.20 ± 2.59	17.47 ± 24.60	17.05 ± 40.38	−4.38 ± 36.16
20 min	10 (16.67%)¹	2.60 ± 3.78	2.60 ± 1.67	20.47 ± 30.93	24.81 ± 45.67	−8.75 ± 39.56
25 min	7 (11.67%)¹	2.00 ± 3.50	2.00 ± 1.97	22.72 ± 27.52	26.15 ± 40.31	−10.27 ± 40.40

N: expresses the number of patients with a transmurality index > 75% in the acute CMR. Δ: expresses the change of the variables from the acute to the chronic CMR.
Data expressed as mean and standard deviation.¹Data expressed as mean (percentages).
Min: minutes. WMSI: Wall motion score index. Num: number. EDV: end-diastolic volume. ESV: end-systolic volume. EF: ejection fraction.

ISSN: 1532-429X