Table 7.
Comparison of study results in acute versus chronic myocardial infarction
| Acute MI (n = 22) | Chronic MI (n = 26) | P-value | |||
|---|---|---|---|---|---|
| Mean/Median | SD/IQR | Mean/Median | SD/IQR | ||
| Age (years) | 55.00 | 11.36 | 59.27 | 10.98 | 0.19 |
| Gender (Male) | 0.53 | ||||
| Body surface area | 2.00 | 0.28 | 1.95 | 0.49 | 0.69 |
| Heart rate (bpm) | 68 | 16 | 61 | 10 | 0.10 |
| Baseline CMR results | |||||
| IS (% of LV) | 24 | 14 | 20 | 11 | 0.22 |
| LVEDVi (ml/m2) | 94 | 29 | 99 | 26 | 0.54 |
| LVESVi (ml/m2) | 57 | 28 | 55 | 30 | 0.86 |
| SVi (ml/m2) | 37 | 10 | 44 | 8 | 0.02 |
| LVMi (g/m2) | 63 | 22 | 59 | 14 | 0.53 |
| EF (%) | 42 | 12 | 46 | 14 | 0.24 |
| Kinetic Energy Mapping results | |||||
| LV KEiEDV | 6.7 | 2.5 | 6.4 | 2.0 | 0.71 |
| Minimal KEiEDV | 0.8 | 0.7 | 0.6 | 0.5 | 0.53 |
| Systolic KEiEDV | 6.7 | 2.3 | 6.7 | 2.9 | 0.68 |
| Diastolic KEiEDV | 6.9 | 3.5 | 6.1 | 2.7 | 0.79 |
| Peak E-wave KEiEDV | 15.6 | 11.7 | 16.6 | 8.7 | 0.76 |
| Peak A-wave KEiEDV | 11.9 | 3.9 | 10.7 | 8.0 | 0.51 |
| In-plane LV (%) | 37.2 | 7.2 | 33.1 | 8.3 | 0.75 |
| TD (msecs) | 34.0 | 27.9 | 33.3 | 25.6 | 0.82 |
Data is presented as mean ± standard deviation (SD) or count (n) for demographics and standard CMR parameters and median ± inter-quartile range (IQR) for KE parameters. LV measurements are indexed to body surface area
All KE values are indexed for LV end-diastolic volume. Units for all KE parameters are μJ/ml
LVEDVi Left ventricular end diastolic volume (indexed), LVESVi Left ventricular end systolic volume (indexed), LVMi left ventricular mass (indexed), MV mitral valve, SVi stroke volume (indexed)