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Table 5 Correlations of vortex formation time and wall shear stress with pulmonary artery dimensions, flow parameters and right ventricular function in patients with PAH

From: Non-invasive evaluation of pulmonary arterial blood flow and wall shear stress in pulmonary arterial hypertension with 3D phase contrast magnetic resonance imaging

Variables Correlation with vortex formation time (%cardiac cycle) Correlation with maximum WSS at MPA (Pa) Correlation with mean WSS at MPA (Pa)
r p value r p value r p value
Geometry of MPA Diameter (mm) −0.257 0.504 0.035 0.928 −0.019 0.962
Area (mm2) −0.212 0.643 0.035 0.928 0.001 0.999
Blood flow parameter at MPA Maximum blood flow velocity (m/sec) −0.391 0.299 0.348 0.359 0.068 0.862
Mean blood flow velocity (m/sec) 0.374 0.321 −0.091 0.817 −0.021 0.957
Maximum blood flow volume (L/min) −0.621 0.080 0.238 0.537 −0.115 0.768
Mean blood flow volume (L/min) −0.004 0.992 −0.119 0.760 −0.232 0.546
SV (mL) −0.025 0.948 −0.122 0.755 −0.262 0.496
WSS at MPA Maximum WSS (pa) −0.354 0.350 0.741 0.022
Mean WSS (Pa) −0.339 0.337 0.741 0.022
RV functional parameter RVEF (%) −0.892 0.003 0.546 0.162 0.592 0.112
RVEDV (mL) 0.408 0.316 0.112 0.791 −0.417 0.305
RVEDVI (mL/m2) 0.366 0.373 0.116 0.784 −0.427 0.291
RVESV (mL) 0.738 0.037 −0.204 0.628 −0.525 0.182
RVESVI (mL/m2) 0.736 0.038 −0.221 0.599 −0.546 0.162
  1. RV right ventricle, MPA main pulmonary artery, SV stroke volume, WSS wall shear stress, RVEF right ventricular ejection fraction, RVEDV right ventricular end diastolic volume, RVEDVI right ventricular end diastolic volume index, RVESV right ventricular end systolic volume, RVESVI right ventricular end systolic volume index