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Table 3 Mean AVA, SVs, peak trans-AoV velocities and VTIs estimated by CMR and Doppler methods.

From: Aortic valve stenotic area calculation from phase contrast cardiovascular magnetic resonance: the importance of short echo time

 

SV (mL)

Vpk (m/s)

VTIpk (cm)

AVA (cm2)

 

Mean ± SD

(p-value)†

Mean ± SD.

(p-value)†

Mean ± SD

(p-value)†

Mean ± SD.

(p-value)

CMR

87.0 ± 21.8

-

-

-

Echo

81.8 ± 17.5

(0.33)

4.28 ± 0.66

99 ± 19

0.85 ± 0.24

PC SV at VTIpk level

   

AVAvol

AVAflow

   TE = 2.8 ms

83.7 ± 33.9

(0.83)

3.87 ± 0.66

(< 0.01)

89 ± 20

(0.02)

1.00 ± 0.26

(0.07)

0.96 ± 0.43

(0.31)

   TE = 2.0 ms

71.0 ± 32.0

(0.26)

3.81 ± 0.59

(< 0.01)

91 ± 20

(0.12)

0.97 ± 0.20

(0.05)

0.77 ± 0.21

(0.32)

   TE = 1.5 ms

78.0 ± 29.6

(0.44)

3.89 ± 0.63

(< 0.01)

93 ± 21

(0.07)

0.95 ± 0.22

(0.10)

0.85 ± 0.30

(0.93)

  1. † p-value <.05 for comparison in each column with Doppler data (Vpk, VTIpk and AVA) or CMR SV (SV)
  2. The Doppler AVA is derived using the continuity equation. PC peak velocity, and PC SV data are from the same AoV level that the PC VTIpk was obtained.