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Table 3 Comparison of mitral regurgitation severity in HCM patients with LVOT obstruction: aortic vs. pulmonary flow-based MRvol grades

From: Quantification of mitral regurgitation in patients with hypertrophic cardiomyopathy using aortic and pulmonary flow data: impacts of left ventricular outflow tract obstruction and different left ventricular segmentation methods

  Aortic flow-based MRvol grades calculated as LVSVincl − Ao
<15 ml 15–29 ml 30–45 ml 45–59 ml ≥ 60 ml Total
Pulmonary flow-based MRvol grades calculated as LVSVincl − MPA
 < 15 ml 1 1 1 0 0 3 (5.8%)
 15–29 ml 0 8 5 0 1 14 (26.9%)
 30–45 ml 0 1 7 10 0 18 (34.6%)
 45–59 ml 0 0 0 5 3 8 (15.4%)
 ≥ 60 ml 0 0 0 0 9 9 (17.3%)
 Total 1 (1.9%) 10 (19.2%) 13 (25.0%) 15 (28.8%) 13 (25.0%) 52
  1. LVSV left ventricular stroke volume, MPA main pulmonary artery, MRvol mitral regurgitation volume