Regional assessment of left ventricular torsion by CMR tagging

Table 1 Analytical test case: Relative deviation of analytical peak rotation and torsion per AoRdisp*

	Simulated apex displaced	Simulated base displaced	Both displaced in same direction	Both displaced in opposite direction
Torsion: global and transmural layers	0.03	0.03	0.05	0.05
Torsion: circumferential segments	0.56 ± 0.27	0.45 ± 0.26	0.50 ± 0.29	0.90 ± 0.44
Rotation: global and transmural layers	0.001	0.002	n/a	n/a
Rotation: circumferential segments	0.64 ± 0.29	0.68 ± 0.40	n/a	n/a

*The simulated apex and base are the largest and smallest Z value (Eq. [5–7]) of the cylinder. Torsion and rotation calculated in circumferential segments are averaged over all segments.

ISSN: 1532-429X