Table 3.
Comparison of the pre-PCI and post-PCI coronary haemodynamics in the BA and stent and MT and stent groups (pre-PCI vs post-PCI values: †p<0.0001; ‡p<0.05)
| BA (n=20) | MT (n=21) | p Value | |
|---|---|---|---|
| Pre-PCI | |||
| Pd, mm Hg | 48.8±19.9 | 44.6±16.8 | 0.47 |
| Pa, mm Hg | 89.4±18.3 | 85.9±21.3 | 0.58 |
| Pw, mm Hg | 22.8±12.1 | 17.7±11.0 | 0.17 |
| Tmn, s | 1.5±0.9 | 1.3±0.9 | 0.44 |
| IMR(app) | 65.3±45.9 | 51.6±35.7 | 0.29 |
| IMR | 40.7±40.7 | 30.7±20.0 | 0.32 |
| FFR | 0.54±0.20 | 0.53±0.20 | 0.72 |
| CFR | 1.04±0.56 | 1.14±0.52 | 0.56 |
| CFIp | 0.19±0.11 | 0.14±0.11 | 0.16 |
| Post-PCI | |||
| Pd, mm Hg | 80.4±20.4† | 81.6±19.7† | 0.85 |
| Pa, mm Hg | 84.3±21.8 | 84.9±19.7 | 0.93 |
| Tmn, s | 0.6±0.4† | 0.5±0.3† | 0.66 |
| IMR(app) | 44.6±36.3‡ | 43.3±30.1 | 0.90 |
| IMR | 41.6±34.1 | 40.1±28.5 | 0.88 |
| FFR | 0.96±0.04† | 0.96±0.06† | 0.63 |
| CFR | 1.27±0.56 | 1.43±0.71 | 0.43 |
BA, balloon angioplasty; CFIp, pressure-derived collateral flow index; CFR, coronary flow reserve; FFR, fractional flow reserve; IMR(app), apparent IMR without correction for collaterals; IMR, index of microcirculatory resistance; MT, manual thrombectomy; Pa, aortic pressure; Pd, distal coronary pressure; Pw, coronary wedge pressure during balloon occlusion; PCI, percutaneous coronary intervention; Tmn, transit time.