Table 4.
Correlation between pulmonary artery measurements and circulation or right ventricular function. The area of the MPA was positively correlated with clockwise and counterclockwise circulation in the proximal MPA. The diameter of the MPA was positively correlated with counterclockwise circulation in the proximal MPA. The diameter of the MPA was positively correlated with clockwise and counterclockwise Min circulation in the short-axis distal MPA. The diameter of the MPA was positively correlated with the Min longitudinal circulation.
| Circulation | MPA-Area-max | MPA diameter max | PRF | mPAP | RVSP | MPA velocity | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ρ | P | ρ | P | ρ | P | ρ | P | ρ | P | ρ | P | |
| N | 20 | 20 | 20 | 14 | 16 | 20 | ||||||
| Short-axis proximal MPA | ||||||||||||
| CW | ||||||||||||
| Max | 0.54 | 0.01 | 0.34 | 0.1 | − 0.006 | 0.9 | − 0.48 | 0.08 | − 0.12 | 0.6 | − 0.17 | 0.4 |
| Min | 0.34 | 0.1 | 0.37 | 0.1 | − 0.16 | 0.4 | − 0.52 | 0.05 | − 0.07 | 0.7 | − 0.32 | 0.1 |
| Integral | 0.59 | 0.006 | 0.29 | 0.2 | − 0.13 | 0.5 | − 0.41 | 0.1 | − 0.06 | 0.7 | − 0.16 | 0.4 |
| CCW | ||||||||||||
| Max | 0.66 | 0.001 | 0.5 | 0.02 | 0.03 | 0.8 | − 0.28 | 0.3 | 0.03 | 0.8 | − 0.26 | 0.2 |
| Min | 0.34 | 0.1 | 0.46 | 0.03 | − 0.06 | 0.7 | − 0.15 | 0.5 | 0.14 | 0.5 | − 0.38 | 0.09 |
| Integral | 0.61 | 0.004 | 0.36 | 0.1 | 0.03 | 0.8 | − 0.1 | 0.7 | 0.12 | 0.6 | − 0.09 | 0.7 |
| Short-axis distal MPA | ||||||||||||
| CW | ||||||||||||
| Max | 0.33 | 0.1 | 0.2 | 0.3 | − 0.27 | 0.2 | − 0.09 | 0.7 | 0.43 | 0.07 | 0.08 | 0.7 |
| Min | 0.34 | 0.1 | 0.73 | 0.0002 | − 0.03 | 0.8 | − 0.14 | 0.6 | 0.17 | 0.4 | − 0.26 | 0.2 |
| Integral | 0.33 | 0.1 | 0.25 | 0.2 | − 0.17 | 0.4 | 0.02 | 0.9 | 0.48 | 0.04 | 0.22 | 0.3 |
| CCW | ||||||||||||
| Max | 0.1 | 0.6 | 0.2 | 0.3 | − 0.07 | 0.7 | − 0.02 | 0.9 | 0.4 | 0.09 | 0.17 | 0.4 |
| Min | 0.28 | 0.2 | 0.65 | 0.001 | − 0.36 | 0.1 | − 0.16 | 0.5 | 0.22 | 0.3 | − 0.29 | 0.2 |
| Integral | 0.24 | 0.3 | 0.2 | 0.3 | 0.03 | 0.8 | − 0.15 | 0.5 | 0.33 | 0.2 | 0.29 | 0.2 |
| N | 15 | 15 | 15 | 11 | 14 | 15 | ||||||
| Longitudinal | ||||||||||||
| CW | ||||||||||||
| Max | 0.1 | 0.6 | 0.11 | 0.6 | − 0.17 | 0.5 | − 0.2 | 0.5 | 0.04 | 0.8 | − 0.03 | 0.8 |
| Min | 0.1 | 0.6 | 0.54 | 0.03 | − 0.32 | 0.2 | 0.19 | 0.5 | 0.24 | 0.3 | − 0.45 | 0.09 |
| Integral | 0.1 | 0.6 | 0.05 | 0.8 | − 0.14 | 0.6 | − 0.1 | 0.7 | 0.13 | 0.6 | − 0.007 | 0.9 |
| N | 20 | 20 | 20 | 14 | 16 | 20 | ||||||
| Right ventricular function | ||||||||||||
| RVEF | 0.16 | 0.4 | − 0.55 | 0.8 | 0.03 | 0.8 | − 0.02 | 0.9 | − 0.39 | 0.1 | 0.04 | 0.8 |
| RVEDVi | 0.45 | 0.04 | 0.07 | 0.7 | − 0.09 | 0.7 | − 0.05 | 0.8 | − 0.04 | 0.8 | − 0.03 | 0.8 |
| EVESVi | 0.24 | 0.3 | 0.03 | 0.8 | − 0.1 | 0.6 | − 0.11 | 0.6 | 0.15 | 0.5 | − 0.006 | 0.9 |
| PRF | − 0.14 | 0.5 | − 0.18 | 0.4 | – | – | 0.04 | 0.8 | − 0.05 | 0.8 | 0.36 | 0.1 |
P-value (P) from Spearman signed rank test. Boldface indicates statistical significance (p < 0.05).
MPA main pulmonary artery, PRF pulmonary regurgitant fraction, mPAP mean pulmonary artery pressure, RVSP right ventricular systolic pressure, RV right ventricular, EF ejection fraction, EDVi end-diastolic volume indexed for body surface area, ESVi end-systolic volume indexed for body surface area, CW clockwise, CCW counter clockwise.