n=39 | FB | BH | P value FB vs BH |
Valve level | |||
Stroke volume, mL (SD) | 107.5 (20.2) | 104.1 (19.6) | <0.001 |
Qp/Qs, mean (range) | 0.98 (0.78–1.10) | 1.02 (0.85–1.21) | |
ST-junction level | |||
Stroke volume, mL (SD) | 99.1 (20.2) | 99.9 (20.2) | 0.3 |
Qp/Qs, mean (range) | 1.06 (0.89–1.29) | 1.07 (0.96–1.23) | |
Mid-ascending aorta | |||
Stroke volume, mL (SD) | 96.2 (20.8) | 96.2 (20.6) | 1.0 |
Qp/Qs, mean (range) | 1.10 (0.94–1.21) | 1.11 (0.91–1.29) | |
Pulmonary artery | |||
Stroke volume, mL (SD) | 104.5 (21.1) | 106.0 (20.5) | 0.2 |
P values for flow vs flow | |||
Valve vs pulmonary | 0.02 | 0.1 | |
ST junction vs mid-ascending | 0.01 | <0.001 |
P values for paired t-tests between stroke volumes.
Qp/Qs should be 1 before the coronary arteries (valve level) and 1.05 after the coronary arteries (ST junction and mid-ascending aorta).
BH, breath-hold; FB, free-breathing; Q, flow rate; Qp/Qs, pulmonary flow divided by systemic flow; ST junction, sinotubular junction.