Table 3 Temporal changes in CFVR, maximum baseline blood flow, and maximum hyperemic blood flow in collateral donor artery and recanalized coronary artery (n = 28 patients with successful CTO recanalization)

CFVR pre-PCI

2.30 ± 0.49

/

• Maximum baseline blood flow velocity (m/s)

0.28 ± 0.06

/

• Maximum hyperemic blood flow velocity (m/s)

0.64 ± 0.1

/

CFVR 24 h after PCI

2.71 ± 0.45

2.55 ± 0.35

• Maximum baseline blood flow velocity (m/s)

0.24 ± 0.04

0.28 ± 0.07

• Maximum hyperemic blood flow velocity (m/s)

0.64 ± 0.16

0.71 ± 0.18

CFVR 6 months after PCI

2.68 ± 0.24

2.62 ± 0.26

• Maximum baseline blood flow velocity (m/s)

0.26 ± 0.05

0.26 ± 0.03

• Maximum hyperemic blood flow velocity (m/s)

0.70 ± 0.16

0.69 ± 0.09