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Table 1 Comparison of peak velocities between 4D flow CMR and 2D PC CMR

From: Hemodynamic evaluation in patients with transposition of the great arteries after the arterial switch operation: 4D flow and 2D phase contrast cardiovascular magnetic resonance compared with Doppler echocardiography

  Sample size (n) 4D flow CMR peak velocity (m/s) 2D PC CMR peak velocity (m/s) p-value
  mean (SD) mean (SD)
AAO 19 1.4 (0.4) 1.1 (0.3) 0.003
MPA 18 1.5 (0.6) 1.2 (0.5) 0.002
RPA 17 1.8 (0.6) 1.5 (0.7) 0.005
LPA 17 1.7 (0.5) 1.5 (0.5) 0.200