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Table 2 Comparison of peak velocities of 4D flow CMR and 2D PC CMR and Doppler echo

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) mean (SD) 2D PC CMR peak velocity (m/s) mean (SD) Doppler Echo peak velocity (m/s) mean (SD) 4D flow CMR & Doppler Echo p-value 2D PC CMR & Doppler Echo p-value
AAO 13 1.4 (0.5) 1.1 (0.3) 1.5 (0.7) 0.824 0.114
MPA 9 1.5 (0.7) 1.2 (0.5) 1.5 (0.5) 0.858 0.139
RPA 6 2.0 (0.8) 1.8 (0.8) 2.0 (0.6) 0.833 0.600
LPA 6 1.8 (0.5) 1.6 (0.5) 2.1 (0.8) 0.463 0.207