Material stiffness parameters as potential predictors of presence of left ventricle myocardial infarction: 3D echo-based computational modeling study

Table 3 Correlations between ejection fraction (EF) and mean values of morphological and mechanical parameters

EF (%)	WT (cm)	C-cur (1/cm)	L-cur (1/cm)	Stress (kPa)	Strain	Vol (ml)	Pmax (mm Hg)	ED-YM_f	ES-YM_f	∆YM_f	Dr (cm)	Ht (cm)
Infarct Group
41.2	0.44	0.46	0.56	451.0	1.02	175.6	121	72.6	77.8	5.2	7.0	7.4
49.0	0.53	0.60	0.55	227.8	0.88	97.9	96	150.4	171.2	20.8	5.5	7.0
40.2	0.42	0.47	0.24	380.6	1.05	192.6	105	62.2	70.0	7.8	6.8	9.1
41.3	0.55	0.42	0.26	471.8	1.08	227.2	120	57.1	64.8	7.8	7.7	9.0
52.2	0.47	0.48	0.43	383.1	1.07	146.5	110	59.7	124.5	64.8	6.2	8.3
44.8 ± 5.5	0.48 ± 0.05	0.49 ± 0.07	0.41 ± 0.15	382.9 ± 95.6	1.02 ± 0.08	168.0 ± 48.8	110.4 ± 10.5	80.4 ± 39.6	101.7 ± 45.5	21.3 ± 25.1	6.6 ± 0.80	8.1 ± 0.93
Non-Infarcted Group
60.2	0.76	0.56	0.25	337.3	1.03	115.7	115	72.6	191.9	119.3	6.9	6.6
61.8	0.61	0.60	0.26	413.0	1.05	119.6	130	72.6	217.8	145.2	6.6	6.8
58.2	0.71	0.79	0.35	280.6	1.00	78.8	118	108.9	197.1	88.2	6.1	6.3
57.5	0.75	0.62	0.25	275.3	0.98	119.8	115	116.7	197.1	80.4	6.5	8.1
61.9	0.69	0.59	0.23	432.7	1.08	120.6	138	72.6	197.1	124.5	6.7	7.6
59.9 ± 2.0	0.70 ± 0.06	0.63 ± 0.09	0.27 ± 0.05	347.8 ± 73.0	1.03 ± 0.04	110.9 ± 18.0	123.2 ± 10.3	88.7 ± 22.2	200.2 ± 10.1	111.5 ± 26.8	6.6 ± 0.31	7.08 ± 0.72
R*	0.813	0.702	−0.389	−0.296	0.025	−0.788	0.465	0.196	0.949	0.962	−0.313	−0.636
p*	0.004	0.024	0.266	0.406	0.945	0.007	0.176	0.587	<0.001	<0.001	0.378	0.048

WT wall thickness, C-cur circumferential curvature, L-cur longitudinal curvature, Vol left ventricular volume, ED-YM _f end-diastole YM_f value, ES-YM _f end-systole YM_f value, \( \varDelta {\text{YM}}_{\text{f}} = ({\text{ES - YM}}_{\text{f}} ) - ({\text{ED - YM}}_{\text{f}} ) \), Pmax maximum LV pressure, Dr diameter = (max Dx-out + max Dy-out)/2, Ht height
* R and p values are for the correlations between EF and the 12 geometric and mechanical parameter values

ISSN: 1475-925X