Table 2.
Comparison of the coronary microcirculation between the infarct-related artery and non-infarct related artery at 4 months after AMI
| IRA (LAD) | non-IRA (LCx) | P-value | |
|---|---|---|---|
| Heart rate, beats/min | 67 ± 12 | 70 ± 15 | 0.4 |
| Baseline Pd, mm Hg (normal 87, range 67–128)a | 98 ± 14 | 102 ± 14 | 0.3 |
| Hyperemic Pd, mm Hg (normal84, range 65–113)a | 87 ± 14 | 92 ± 16 | 0.1 |
| Coronary flow velocity reserve | 2.3 ± 0.4 | 2.3 ± 0.4 | 0.8 |
| Baseline APV, cm/s (normal 18, range 5.6–26)a | 23 ± 8 | 20 ± 6 | 0.2 |
| Hyperaemic APV, cm/s (normal 49, range 25–84)a | 50 ± 16 | 43 ± 13 | 0.3 |
| Variable MR, CRU | 3.2 ± 1.4 | 3.8 ± 1.7 | 0.4 |
| Baseline MR, CRU (normal 6.5 range: 3.3–13.2)a | 5.2 ± 1.9 | 6.2 ± 2.7 | 0.3 |
| Hyperaemic MR, CRU (normal 1.69 range: 0.9–3.2)a | 2.0 ± 0.8 | 2.3 ± 1.2 | 0.2 |
Values are mean ± SD
IRA infarct-related artery, LAD left anterior descending coronary artery, LCx circumflex coronary artery, P d distal coronary pressure, APV average peak flow velocity, MR coronary microvascular resistance index, CRU coronary resistance unit (mmHg∙cm−1∙s−1)
aNormal reference values from Chamuleau et al. Am J Physiol Heart Circ Physiol 2003;285:H2194-H2200