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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Ann Thorac Surg. 2014 May 10;98(1):125–132. doi: 10.1016/j.athoracsur.2014.03.035

Table 3.

Relationship of Cerebral Blood Flow Velocities and Resistance Index Values at 18 Hours Post-Cardiopulmonary Bypass with Bayley Scales of Infant Development Outcomes

Variable Psychomotor Development Index Mental Development Index
Slope β ± Standard Error (P) Adjusted R2 Slope β ± Standard Error (P) Adjusted R2
Without CBFV 1.0 7.7
Vm (per cm/s) 0.46±0.14 (0.002) 13.3 0.27±0.11 (0.01) 15.8
Vs (per cm/s) 0.29±0.08 (<0.001) 16.8 0.12±0.06 (0.06) 12.3
Vd (per cm/s) 0.44±0.21 (0.04) 6.5 0.37±0.15 (0.01) 15.5
rVm (per %) 0.079±0.035 (0.03) 7.1 0.074±0.024 (0.004) 18.5
Resistance Index −29.5±19.2 (0.13) 3.5 −36.4±13.3 (0.008) 16.7

CBFV indicates cerebral blood flow velocity; Vm, mean flow velocity; Vs, peak systolic flow velocity; Vd, peak end-diastolic flow velocity; rVm, relative change in Vm.

Linear regressions include adjustments for diagnosis, neonatal status, duration of deep hypothermic circulatory arrest, and family social class.