Table 3.
Comparison of characteristics between detected and undetected myocardial infarctions
| Detected (N = 97) | Undetected (N = 44) | p-value | |
|---|---|---|---|
| Age, y |
60 ± 12 |
59 ± 10 |
0.81 |
| Male (%) |
74 (76) |
33 (75) |
0.87 |
| Infarct localization (%) |
|
|
0.03 |
| Anterior |
36 (37) |
8 (18) |
|
| Non-anterior |
61 (63) |
36 (82) |
|
| Number of diseased vessels |
|
|
0.85 |
| 1 |
49 (51) |
23 (52) |
|
| ≥2 |
48 (49) |
21 (48) |
|
|
Echocardiography | |||
| LVEF (%) | |||
| Acute |
44 ± 7 |
58 ± 7 |
<0.001 |
| Chronic |
48 ± 7 |
59 ± 5 |
<0.001 |
| Days post MI | |||
| Acute |
2.0 (1.0-3.0) |
4.0 (3.0-6.5) |
0.001 |
| Chronic |
101 (91–113) |
104 (97–111) |
0.50 |
| Image quality (%) |
|
|
0.37 |
| Excellent |
26 (27) |
16 (36) |
|
| Average |
61 (63) |
26 (59) |
|
| Poor |
10 (10) |
2 (5) |
|
|
CMR | |||
| Infarct size, % of LV | |||
| Acute |
16 (10–25) |
6 (3–13) |
0.002 |
| Chronic |
15 (8–23) |
6 (3–11) |
<0.001 |
| Infarct transmurality, % | |||
| Acute |
62 ± 14 |
54 ± 17 |
0.07 |
| Chronic |
61 ± 16 |
48 ± 13 |
<0.001 |
| Number of infarcted segments | |||
| Acute |
9 ± 3 |
7 ± 3 |
0.02 |
| Chronic | 9 ± 3 | 7 ± 3 | 0.005 |
Values are presented as mean ± standard deviation, median and interquartile range or proportions (%) when appropriate; MI = myocardial infarction; CMR = cardiovascular magnetic resonance; LVEF = left ventricular ejection fraction.