Table 4.

Contraction reserve based on strain analysis following LGE classification.

LGE	Segments	Radial rebound stretch (δ1) (%)	Systolic septal delay (δ2) (ms)	Radial rebound displacement (δ3) (mm or °)	Circumferential strain stretch (δ4) (%)
0%–25%	678	5.9 (4.3, 8.7)	192 ± 16	2.6 (0.6, 3.8)	3.5 (1.4, 4.0)
26%–50%	65	5.9 ± 0.5	201 ± 27	1.8 ± 0.4*	3.5 ± 1.0
51%–75%	76	6.0 ± 0.4	188 ± 23	1.3 ± 0.2*,¶	3.4 ± 1.2
76%–100%	221	6.2 ± 0.4	148 ± 29*,||,¶	0.6 ± 0.2*,||,¶	−4.7 ± 1.4*,||,¶
P-value	–	0.67	<0.01	<0.001	<0.01

Bold numbers indicate a statistically significant difference.

Data are presented means ± standard deviations or median (interquartile range) as appropriate.

^*P < 0.01 or P < 0.001 for infarct interval [76%–100%] vs. other subgroups at the variable of δ2, δ3, and δ4.

^|| P < 0.01 or P < 0.001 for infarct interval [51%–75%] vs. other subgroups at the variable of δ2, δ3, and δ4.

^¶ P < 0.01 or P < 0.001 for infarct interval [26%–50%] vs. other subgroups at the variable of δ2, δ3, and δ4.