Table 3.

Flow measurements using the Fick technique and using velocity encoded CMR

Fick versus Phase Contrast in catheterizations without shunt (n = 34)
Fick pulmonary blood flow (Qp, L/min/m2)	3.3 ± 0.7
Fick systemic blood flow (Qs, L/min/m2)	3.3 ± 0.7
Fick pulmonary: systemic blood flow (Qp:Qs)	1 ± 0.1
Fick pulmonary vascular resistance (indexed Woods units)	2.4 ± 1.9
Phase Contrast Main Pulmonary Artery indexed (Qp, L/min/m2)	2.9 ± 0.6*
Phase Contrast Aorta indexed (Qs, L/min/m2)	2.8 ± 0.6*
Phase Contrast pulmonary: systemic blood flow (Qp:Qs)	1 ± 0.1
Phase Contrast pulmonary vascular resistance (indexed Woods units)	2.5 ± 2.1
Fick versus Phase Contrast in catheterizations with shunt (n = 11)
Fick pulmonary blood flow (Qp, L/min/m2)	5.6 ± 2.1
Fick systemic blood flow (Qs, L/min/m2)	3.4 ± 0.8
Fick pulmonary: systemic blood flow (Qp:Qs)	1.8 ± 0.9
Fick pulmonary vascular resistance (indexed Woods units)	1.9 ± 1.6
Phase Contrast Main Pulmonary Artery indexed (Qp, L/min/m2)	5.1 ± 2.1
Phase Contrast Aorta indexed (Qs, L/min/m2)	2.8 ± 0.7*
Phase Contrast pulmonary: systemic blood flow (Qp:Qs)	2 ± 0.9*
Phase Contrast pulmonary vascular resistance (indexed Woods units)	2.1 ± 2

*p<0.05 Student t-test (two-tailed)

*p<0.05 Wilcoxon Signed Ranks Test (two-tailed)