. 2018 Oct 2;16:24. doi: 10.1186/s12947-018-0140-0

Table 2.

Clinical and functional characteristics at baseline and after 6 months of CRT

Parameter		I group (n = 20)	II group (n = 39)	P
NYHA functional class	At baseline	2.6±0.6	2.8±0.6	0.107
NYHA functional class	After 6 months	1.9±0.7^a	2.2±0.9^a	0.169
6-min walking distance, (m)	At baseline	329.2±86.0	320.9±98.7	0.651
6-min walking distance, (m)	After 6 months	421.5±66.7^a	381.5±112.2^a	0.169
LVEF by 3D echocardiography, (%)	At baseline	30.0±2.7	29.6±3.9	0.458
	After 6 months	40.1±5.4^a	34.4±3.8^a	< 0.001
	Mean changes	10[6.2;13.2]	5[3;7]	< 0.001
LVEDV by 3D echocardiography, (ml)	At baseline	233.4±65.0	231.2±65.9	0.820
	After 6 months	159.1±39.4^a	213.2±63.7^a	< 0.001
	Mean changes	−73.0[− 101.0;-51.7]	−15.0[− 31.0;-8.0]	< 0.001
LVESV by 3D echocardiography, (ml)	At baseline	163.4±46.5	163.5±51.3	0.957
	After 6 months	95.8±27.1^a	140.0±46.7^a	< 0.001
	Mean changes	−61.0[−91.0;-47.7]	− 20.0[− 38.0;-12.0]	< 0.001
QRS, (ms)	At baseline	139.1±44.2	141.8±36.7	0.996
QRS, (ms)	After 6 months	153.6±26.2	160.2±26.0^a	0.367

^a – difference between baseline and postimplant value (р < 0.05)