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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