Evaluation of Strain (Circumferential and Radial) from Short Axis View

Torsion

Some random stuff: $E_{cc}$

There are three features that represent different aspects of torsion: Endocardial Torsion, Epicardial Torsion, and Global Torsion.

def evaluate_torsion(seg_sa: Tuple[float, float, float, float], nim_sa: nib.nifti1.Nifti1Image, contour_name_stem):
    pass

Individuals with chronic aortic stenosis have been shown to display elevated peak LV torsion compared with healthy controls (Esch & Warburton, 2009).

Reductions in peak and peak rates of torsion and recoil have been shown to be reduced in heart failure patients with a reduced ejection fraction. However, conversely, heart failure with preserved ejection fraction have normal LV twist and untwist.(Esch & Warburton, 2009)

Esch, B. T., & Warburton, D. E. R. (2009). Left ventricular torsion and recoil: Implications for exercise performance and cardiovascular disease. Journal of Applied Physiology, 106(2), 362–369. https://doi.org/10.1152/japplphysiol.00144.2008