Fig 4. The correlations between luminal areas of the pulmonary arteries, the obstruction ratio and pulmonary vascular resistance.

(A) The luminal areas of pulmonary arteries were negatively correlated with the mean obstruction ratio (n = 17, r = -0.836, p = 1.6×10⁻⁵). (B) The luminal area were negatively correlated with the follow-up pulmonary vascular resistance (PVR) (n = 16, r = -0.809, p = 0.0002).