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Table 3 The severity of mitral regurgitation according to the Doppler echocardiography ([15]

From: Methods of estimation of mitral valve regurgitation for the cardiac surgeon

Severity Of Mitral Valve Regurgitation I (mild) II III IV (severe)
Jet (% Left atrium) < 15% 15–30% 35–50% > 50%
Spectral Doppler Faint - - Dense
Vena contracta < 3 mm - - > 6 mm
Pulmonary vein flow S > D - - Systolic reversed
Right ventricle (ml) < 30 30–45 45–59 > 60
Effective regurgitant orifice (ERO in cm2) < 0.20 0.20–0.29 0.30–0.39 > 40
Proximal Isovelosity Surface Area (PISA) small - - large
  1. The points of inaccuracy are depicted in bold or with question marks.