Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

Table 4 Prediction of volumetric response to CRT with GE derived echocardiographic images

	Univariate analysis (n = 123)			Receiver operating characteristics (n = 123)
Parameter	B	SD	p-value	C-statistic	Cut-off value
GE SL-delay	0.820	12.997	0.950	0.512	0.144
TomTec SL-delay	22.334	13.081	0.091	0.573	−0.101
GE SRSsept	3.146	0.911	<0.001	0.599	1.614
TomTec SRSsept	0.503	1.362	0.713	0.544	0.455
GE SSI	2.296	0.653	<0.001	0.619	2.980
TomTec SSI	1.250	0.818	0.129	0.530	3.715
GE LBBB-type (type 1 or 2 vs. 3)	18.536	4.003	<0.001
TomTec LBBB-type (type 1 or 2 vs. 3)	8.151	4.464	0.071

Prediction of volumetric response to CRT, with results of univariate regression analysis (B, SD and p-value) and receiver operating characteristics (C-statistic, R² and cut-off). Univariate analyses are based on a change in LVESV on a continuous scale, while receiver operating characteristics are based on a cut-off of ≥15% reduction in LVESV
GE General Electric EchoPac, TomTec TomTec 2DCPA, B beta coefficient, SD standard deviation, SL-delay septal-to-lateral wall delay, SRSsept septal systolic rebound stretch, SSI systolic stretch index, LBBB-type septal strain pattern categorization according to Leenders et al

ISSN: 1476-7120