Table 1: Doppler ultrasound indices pre-PTRA and post-PTRA.

RI AT (ms) AI (m/s2) PSV (m/s)
Pre-PTRA (2007) 0.68 193 1.68 2.59/1.10
Post-PTRA (2007) 0.59 140 1.31 3.37/1.02
Post-PTRA (2010) 0.56 173 1.26 3.20