• Different LV segmentation models are used in clinical practice.
• The 17-segment model is recommended to assess myocardial perfusion with echocardiography and other imaging techniques.
• The 16-segment model is recommended for routine studies assessing wall motion, because endocardial excursion and thickening of the tip of the apex are imperceptible.
• To assess wall motion, each segment should be evaluated in multiple views and a four-grade scoring should be applied:
  1. Normal or hyperkinetic
  2. Hypokinetic (reduced thickening)
  3. Akinetic (absent or negligible thickening)
  4. Dyskinetic (systolic thinning or stretching)
• An aneurysm is a morphologic entity that demonstrates focal dilatation and thinning (remodeling) with either akinetic or dyskinetic systolic deformation. The committee refrains from assigning a separate wall motion score for aneurysm.
• Despite promising data, quantitative assessment of the magnitude of regional LV deformation cannot be recommended at this stage because of lack of reference values, suboptimal reproducibility, and considerable inter-vendor measurement variability.