Table 4.

Averaged, normalized percent increase or decrease relative to baseline (horizontal tilt table position) for all tilt table subjects

Head UpHead Down
Doppler indexes, normalized percent change
Epeak, m/s−24 (SD 17)a+4 (SD 14)b
AT, s+10 (SD 12)a−9 (SD 13)a
DT, s+3 (SD 18)d−7 (SD 17)a
Edur, s+7 (SD 10)a−7 (SD 11)a
Apeak, m/s−2 (SD 20)a+6 (SD 15)a
Adur, s+0 (SD 13)e−5 (SD 10)a
E/A−26 (SD 20)a−5 (SD 20)c
HR, beats/min+15 (SD 9)a+8 (SD 9)a
PDF parameters, normalized percent change
c, × 103 (1/s)−33 (SD 31)a+25 (SD 48)a
k, × 103 (1/s2)−37 (SD 16)a+19 (SD 28)a
xo, m−5 (SD 26)f+5 (SD 26)g
  • Values are means (SD); n = 16. +, Increase; −, decrease.

  • a P < 0.0001;

  • b P < 0.001;

  • c P < 0.01;

  • d P = 0.03;

  • e P = 0.09;

  • f P = 0.4;

  • g P = 0.07. All P values vs. baseline.