Table 3. Comparison of collateral flow measurements in 31 pts who had both pre and post TCPC MRI’s and no other interval interventions.
A significant decrease was seen in collateral flow indexed to aortic flow from SCPC to TCPC. There were also significant increases in QP and QP/QS, as well significant decreases in QS and right to left shunt.
| SCPC | TCPC | p-value | |
|---|---|---|---|
| n | 31 | 31 | |
| Age (years) | 2.9±1.3 | 4.0±1.3 | |
| Time from TCPC (years) | −0.37±0.5 | 0.62±0.3 | |
| QAo (L/min/m2) | 4.6±0.7 | 4.4±1.0 | 0.13 |
| Qcoll (L/min/m2) | 1.5±0.7 | 1.7±1.0 | 0.09 |
| Qcoll/QAo x100 (%) | 31±13 | 37±17 | 0.02 |
| Qcoll/QP x100 (%) | 45±17 | 41±18 | 0.15 |
| QP (L/min/m2) | 3.2±0.7 | 4.0±1.0 | <0.001 |
| QS (L/min/m2) | 3.2±0.7 | 2.8±0.8 | 0.002 |
| QPA (L/min/m2) | 1.7±0.6 | 2.2±0.8 | 0.001 |
| QP/QS | 1.1±0.4 | 1.5±0.6 | <0.001 |
| Right to Left Shunt (L/min/m2) | 1.5±0.5 | 0.5±0.4 | <0.001 |