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Table 4 Correlation of changes in LVEF and WMSI during stress echo test and flow parameters in collateral donor and CTO arteries (n = 28 patients with successful CTO recanalization)

From: Prompt and consistent improvement of coronary flow velocity reserve following successful recanalization of the coronary chronic total occlusion in patients with viable myocardium

  Delta LVEF (baseline minus peak stress) Delta WMSI (baseline minus peak stress)
Before PCI - collateral donor artery
CFVR ρ = 0.214, p = 0.275 ρ = 0.080, p = 0.687
Maximum baseline blood flow ρ = −0.162, p = 0.409 ρ = −0.251, p = 0.197
Maximum hyperemic blood flow ρ = 0.232, p = 0.236 ρ = − 0.098, p = 0.619
24hafter PCI - collateral donor artery
CFVR ρ = −0.015, p = 0.940 ρ = −0.181, p = 0.358
Maximum baseline blood flow ρ = 0.169, p = 0.390 ρ = 0.082, p = 0.680
Maximum hyperemic blood flow ρ = −0.029, p = 0.884 ρ = 0.204, p = 0.298
Delta CFVR donor artery (24 h vs. baseline) ρ = −0.214, p = 0.274 ρ = 0.229, p = 0.241
24 h after PCI - CTO artery
CFVR ρ = 0.318, p = 0.099 ρ = −0.028, p = 0.887
Maximum baseline blood flow ρ = 0.302, p = 0.119 ρ = −0.376, p = 0.059
Maximum hyperemic blood flow ρ = 0.413, p = 0.029 * ρ = −0.155, p = 0.431
  1. PCI percutaneous coronary intervention, CFVR coronary flow velocity reserve; * p < 0.05