Table 1

Quantitative echocardiographic measures of severe aortic stenosis by documented interpretation

Echocardiographic measurementsAll patients
(n=77 067)
Severity by documented interpretation
Severe
(n=1219) (1.6%)
Non-severe
(n=75 848) (98.4%)
Individual elements
 Peak velocity≥4.0 m/s1040 (1.3%)852 (69.9%)188 (0.2%)
 Mean gradient≥40 mm Hg852 (1.1%)759 (62.3%)93 (0.1%)
 Aortic valve area≤1.0 cm2 3055 (4.0%)1147 (94.1%)1908 (2.4%)
 Indexed aortic valve area≤0.6 cm2/m2 5075 (6.6%)1185 (97.2%)3890 (4.9%)
 Dimensionless index (VTI)≤0.251643 (2.1%)972 (79.7%)671 (0.9%)
 Dimensionless index (peak velocity)≤0.251640 (2.1%)981 (80.5%)659 (0.8%)
Combined elements
 Peak velocity or mean gradient1079 (1.4%)876 (71.9%)203 (0.3%)
 Peak velocity, mean gradient or aortic valve area3196 (4.1%)1199 (98.4%)1997 (2.5%)
 Peak velocity, mean gradient or indexed valve area5134 (6.7%)1206 (98.9%)3928 (5.0%)
 Peak velocity, mean gradient or dimensionless index (VTI)1959 (2.5%)1145 (93.9%)814 (1.0%)
 Peak velocity, mean gradient or dimensionless index (peak velocity)1909 (2.6%)1120 (91.9%)789 (1.0%)
  • VTI, velocity time integral.