Table 3.

Comparison between studies using CMR-FT and echocardiography

Study	Strain parameters	Software	Healthy subjects	Subjects disease studied	Main findings	Limitations
					Positive		Negative
Kempny et al 201237	RV & LV C, R, L Global and segmental	TomTec Tomtec (STE)	25	28 Tetralogy of Fallot	–Close agreement between global LV and global RV strain measurements –Similar inter-observer agreement for both modalities for LV GLS. –Better inter-observer reproducibility for LV CS or RS and RV GLS measured by FT	–Reproducibility for regional strain using FT technique was poor	–No TOF patients with different severity of pulmonary regurgitation data, for the association between the severity of pulmonary regurgitation and strain measurements
Padiyath et al 201335	RV & LV C, R, L Global and segmental	TomTec Tomtec (2DE)	20	20 Tetralogy of Fallot	–Best intermodality agreement for GCS followed by GLS –Acceptable inter-observer agreement for GLS and GCS of LV and RV with both modalities	–Inter-modality and inter-observer agreements were poor for GRS	–Small sample size –Heterogeneous related to age and gender in both groups –No right ventricle out flow assessment by FT technique
Onishi et al 201336	R Segmental	TomTec Tomtec		72 Dyssynchrony	–Reasonable agreement between both modalities for the patients with more marked dyssynchrony		–No available long term follow up data
Orwat et al 201434	L, C Global	TomTec Tomtec	20	20 patients with left ventricular hypertrophy cardiomyopathy (HCM)	–Good agreement between both modalities for LV GLS for healthy and patients	–Poor agreement for CS and all SR measurements. –Higher LV and RV strain, inter-observer reproducibility compared to SR	–Small sample size –Heterogeneous related to age in both group

C, circumferential; CS, circumferential strain; CSR, circumferential strain rate; GCS, global circumferential strain; GRS, global radialstrain; GLS, global longitudinal strain; L, longitudinal; LS, longitudinalstrain; LV, left ventricle; R, radial; RS, radialstrain; RV = right ventricle; TOF, tetralogy of fallot.

Tomtec = MR feature tracking analysis. Echocardiography FT: Tomtec(2DE)=2D Echocardiography analysis. Tomtec (STE) = Speckle Trackinganalysis. (TomTec Imaging Systems, Munich, Germany).