Table 1.

Comparison between studies using CMR-FT technique

Study	Strain parameters	Software	Healthy subjects	Subjects Disease studied	Main findings	Limitations
					Positive		Negative
Schuster et al 201119	RV & LV C, R, L Segmental, Global	Tomtec	10	-	–During dobutamine stress, CS & RS increased significantly –CS, best observer variability of LV	–Worse observer variability of RV- LS	–Small sample size
Schuster et al 201314	LV C, R Segmental	Tomtec CVI42	-	15 Ischaemic cardiomyopathy	–No response to dobutamine in dysfunctional segments with scar in all C & R strain parameters		–Small sample size –No Follow up post-revascularization data –No functional recovery data
Kowallick et al 201420	LA L Global and segmental	Tomtec	10	20 Hypertrophic cardiomyopathy (10) Heart failure (10)	–Excellent inter- & intra-observer variability for all strain and SR –LS discrimination between patients and healthy controls		–Small sample size
Taylor et al 201421	LV C, R Segmental	Tomtec	55	108 Cardiomyopathy	–Lower CS & RS in patients than healthy controls		–Heterogeneous age and gender groups
Maret et al 200916	LV R, L Global and segmental	Tomtec	–	30 Presence of LV scar	–Lower functional measures in scarred segments than distant segments
Morton et al 201222	LV R, L Global and segmental	Tomtec	16	-	CS most reproducible measure of LV	–Variable inter-study reproducibility –L measures least reproducible segmental measure of RV measurements. RS least reproducible global measurement	–Small sample size

C, circumferential; CS, circumferential strain; CVI42, Circle Cardiovascular Imaging Inc. Calgary, Canada; GCS, global circumferential strain; GLS, global longitudinal strain; GRS, global radial strain; L, longitudinal LA, left atrial; LS, longitudinal strain; LV, Left ventricle; R, radial; RS, radial strain; RV, right ventricle; Tomtec, TomTec Imaging Systems, Munich, Germany.