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Table 2 Comparison of 4D flow CMR-derived flow volumes and flow patterns before and after aortic valve repair

From: 4D flow cardiovascular magnetic resonance for monitoring of aortic valve repair in bicuspid aortic valve disease

Measurepre OPpost OPp value
Forward flow (ml)120 ± 4480 ± 24< 0.001
Backward flow (ml)21 ± 175 ± 3< 0.001
Net flow (ml)99 ± 3675 ± 23< 0.001
Peak systolic velocity (cm/s)225 ± 85192 ± 400.014
Regurgitant fraction (%)17 ± 106 ± 4< 0.001
Helix grade
 Ascending aorta1.6 ± 0.60.9 ± 0.5< 0.001
 Aortic arch0.5 ± 0.70.3 ± 0.5ns
 Descending aorta0.3 ± 0.60.1 ± 0.4ns
Vortex grade
 Ascending aorta1.2 ± 0.80.5 ± 0.60.002
 Aortic arch0.2 ± 0.40.0 ± 0.0ns
 Descending aorta0.3 ± 0.60.2 ± 0.4ns
  1. Values represent mean ± SD. p < 0.05 indicates a statistically significant difference. Significant values are in bold