Global and regional left ventricular myocardial deformation measures by magnetic resonance feature tracking in healthy volunteers: comparison with tagging and relevance of gender

Table 6 Bland Altman analysis for comparison between CMR tagging and feature tracking

	CMR Tagging vs. FT agreement
	Global		Basal		Mid		Apical
Variable	Bias	LOA	Bias	LOA	Bias	LOA	Bias	LOA
Longitudinal Strain	−0.01	−0.16 to 0.03	−0.06	−0.19 to 0.06	−0.05	−0.21 to 0.11	0.04	−0.12 to 0.20
Longitudinal Strain Rate (s^-1)	−0.22	−0.82 to 0.37	0.01	−0.16 to 0.19	0.03	−0.05 to 0.12	−0.02	−0.12 to 0.07
Radial Strain	0.11	−0.01 to 0.23	0.12	0.03 to 0.23	0.12	−0.05 to 0.30	0.08	−0.13 to 0.30
Radial Strain Rate (s^-1)	0.26	−0.34 to 0.86	0.20	−0.71 to 1.11	0.41	−0.32 to 1.16	0.17	−0.83 to 1.16
Circumferential Strain	−0.007	−0.06 to 0.04	−0.05	−0.14 to 0.04	0.02	−0.04 to 0.07	0.009	−0.05 to 0.07
Circumferential Strain rate (s^-1)	−0.21	−0.53 to 0.11	−0.44	−1.09 to 0.21	−0.07	−0.42 to 0.27	−0.12	−0.50 to 0.25

CMR indicates cardiac magnetic resonance; FT, feature tracking; LOA, limits of agreement; s, seconds.

ISSN: 1532-429X