Table 3 Flow measurements using the Fick technique and using velocity encoded CMR
From: Radiation-free CMR diagnostic heart catheterization in children
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 |