Skip to main content

Table 3 Results of Pearson’s correlation and Bland-Altman analysis for MRvol by QPD and reference methods

From: The impact of different geometric assumption of mitral annulus on the assessment of mitral regurgitation volume by Doppler method

MethodMRvol (ml)Pearson’s correlation analysisBland-Altman analysis
rpMean difference (ml)95% limits of agreement (ml)p
Circular assumption
 QPD-MAPLAX66.4 ± 41.10.574<0.000122.5− 43.6 ~  88.6<0.0001
 QPD-MAA4C54.3 ± 27.60.822<0.000110.4−20.6 ~  41.4<0.0001
 QPD-MAA2C38.4 ± 20.60.805<0.0001−5.5−31.7 ~  20.20.0002
RT3DE43.9 ± 21.3     
Ellipse assumption
 QPD-MAPLAX + A4C59.1 ± 29.50.789<0.000115.2−20.5 ~  51.0<0.0001
 QPD-MAPLAX + A2C50.6 ± 25.60.776<0.00016.8−24.9 ~  38.50.0002
 QPD-MAA4C + A2C45.6 ± 21.50.905<0.00011.7−16.6 ~  20.10.0844
  1. QPD-MAPLAX MRvol was measured by QPD using circular geometric assumption, and the MA diameter was measured in PLAX view, QPD-MAPLAX + A4C MRvol was measured by QPD using ellipse assumption, and the MA diameter was measured in PLAX and A4C view, RT3DE MRvol was measured using EROA multiplied by the VTIMR