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Table 1 Speckle tracking and visual evaluation parameters constituting multiparametric model

From: Combination of single quantitative parameters into multiparametric model for ischemia detection is not superior to visual assessment during dobutamine stress echocardiography

Variable Segment Cutoff Unit
Model for at least one stenosis per patient
Maximal strain rest Mid septal -18.39 %
A’ velocity rest Mid anterior -1.83 cm/s
Time to maximal strain rest Apical septal 394.0 ms
Time to S’ velocity stress Apical anterior 78.0 ms
Time to S’ velocity stress Mid anterior 51.0 ms
Systolic strain rate stress Apical septal -2.37 s-1
Radial systolic displacement rest Basal lateral 5.42 mm
A’ strain rate stress Basal lateral 1.96 s-1
S’ velocity stress Basal anterior 6.78 cm/s
Systolic strain rest Apical septal -22.43 %
Maximal strain rest Basal inferior -20.12 %
Visual WMSIstress-WMSIrest 0.13  
Model for LAD
Systolic strain rest Apical septal -11.53 %
Systolic positive strain stress Basal inferior 0.27 %
Maximal strain rest Basal inferior -21.53 %
S’ velocity stress Basal anterior 8.41 cm/s
E’ velocity stress Basal septal -7.2 cm/s
A’ velocity rest Mid anterior -1.69 cm/s
Visual WMSIstress-WMSIrest 0.13  
Time to maximal strain rest Apical anterior 353.0 ms
Time to S’ velocity stress Mid septal 78.0 ms
Time to S’ velocity stress Apical anterior 120.0 ms
Time to S’ velocity stress Mid anterior 59.0 ms
A’ strain rate stress Basal lateral 1.96 s-1
Systolic strain rate stress Apical septal -2.37 s-1
Radial systolic strain stress Mid septal 8.44 %
Model for LCX
A’ strain rate stress Basal lateral 1.70 s-1
A’ velocity rest Mid anterior -3.42 cm/s
Systolic strain rest Apical septal -24.48 %
S’ velocity rest Apical inferior 3.50 cm/s
E’ velocity stress Basal septal -5.51 cm/s
Radial systolic displacement rest Basal lateral 7.33 mm
Systolic strain rate stress Apical septal -2.84 s-1
Time to maximal strain rest Apical anterior 404.0 ms
Time to S’ velocity stress Apical anterior 56.0 ms
Time to S’ velocity stress Mid septal 75.0 ms
Radial systolic strain stress Mid septal 41.90 %
Visual WMSIstress-WMSIrest 0.13  
Model for RCA
Maximal strain rest Basal inferior -20.12 %
Systolic strain rest Apical septal -22.4 %
S’ velocity rest Apical inferior 1.38 cm/s
Time to maximal strain rest Apical anterior 390.0 ms
Time to maximal strain rest Apical septal 399.0 ms
Time to maximal strain rest Basal posterior 397.0 ms
Time to S’ velocity stress Mid anterior 47.0 ms
Systolic positive strain stress Basal inferior 0.48 %
E’ velocity stress Basal septal -2.88 cm/s
Radial systolic displacement rest Basal lateral 5.42 mm
Visual WMSIstress-WMSIrest 0.13  
  1. LAD Left ascending artery, LCX Left circumflex artery, RCA Right coronary artery