Indicators	Posterior wall			Inferior wall			Posterior interval
Indicators	Basal	Middle	Apical	Basal	Middle	Apical	Basal	Middle	Apical
non-SIS groups (n = 30)	−18.38 ± 3.96	−19.38 ± 5.9	−21.13 ± 2.9	−18.75 ± 3.73	−17.5 ± 7.15	−22.13 ± 2.59	−14.25 ± 3.01	−20.75 ± 4.03	−25 ± 8.16
SIS groups (n = 30)	−18.08 ± 3.96	−18.42 ± 5.4	−20.25 ± 4.53	−13.67 ± 6.58	−21.42 ± 4.2	−22 ± 6.71	−9.08 ± 3.12	−20.58 ± 5.99	−26.17 ± 4.65
P value	0.874	0.712	0.636	0.064	0.139	0.961	0.006	0.946	0.688