Patients with pulmonary hypertension (PHTN) are known to have altered pulmonary artery (PA) hemodynamics in addition to differing PA pressures measured using invasive right heart catherization. 4D flow MRI can provide information about PA hemodynamics, such as 3D wall shear stress that might be useful in diagnosis or grading of PHTN. Previous work on WSS used manually placed planes for evaluating regional WSS, we derive WSS metrics over the entire vessel. 3D WSS measurements in the PA were significantly different between a cohort of patients with WHO group 2 PHTN and healthy controls and were correlated with catheter-based pressure measurements.
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