Table 2. Myocardium at risk, infarct size, left ventricular ejection fraction and volumes, and myocardial salvage in patients with and without microvascular obstruction (MVO). Data are presented as median values (interquartile range).
| Early CMR | Late CMR | |||
| MVO− | MVO+ | MVO− | MVO+ | |
| Myocardium at risk (% of left ventricle) | 37.1 (29.8–46.9) | 47.7 (43.6–55.3) | ||
| Infarct size (% of left ventricle) | 11.6 (6.5–15.6) | 24.0 (17.0–31.9) | 6.6 (2.8–12.5) | 17.7 (14.2–25.6) |
| Ejection fraction (%) | 55 (50–62) | 47 (41–53) | 64 (59–70) | 50 (43–54) |
| LV EDVa (ml) | 138 (118–167) | 175 (156–198) | 141 (124–176) | 191 (158–219) |
| LV ESVb (ml) | 58 (47–78) | 92 (72–114) | 59 (43–68) | 97 (72–122) |
| Myocardial salvagec (%) | 38 (21.2–53.6) | 23 (11.6–33.7) | 65.4 (50.5–79.6) | 39.8 (25.3–51.4) |
a
LV EDV: Left ventricular end-diastolic volume.
b
LV ESV: Left ventricular end-systolic volume.
c
Myocardial salvage = [(Myocardium at risk – Infarct size)/Myocardium at risk]×100.