Table 5.

QRS duration, New York Heart Association functional class, proBNP levels, and echocardiographic parameters at baseline and 6 months between both randomized groups

	Group 1	Group 2	P value
QRS duration, ms
Baseline	158.85±13.93	154.1±13.5	0.210
6 months	139.45±10.25	154.1±13.4	<0.001
NYHA functional class
Baseline	2.55±0.50	2.45±0.50	0.502
6 months	1.65±0.73	1.85±0.92	0.402
proBNP levels, pg/mL
Baseline	1355 (398-3372)	1290 (358-3612)	0.821
6 months	654 (180-2277)	976 (168-2619)	0.590
LVEF, %
Baseline	21.05±4.83	20.55±5.02	0.772
6 months	33.70±10.6	26.35±7.47	0.005
LVEDV, mL
Baseline	234.5 (187-262)	239 (201-262)	0.464
6 months	192 (123-225)	205.5 (181-254)	0.037
LVESV, mL
Baseline	188.0 (132-202)	191 (157-212)	0.878
6 months	132 (67-168)	142.5 (127-194)	0.018
Fluoroscopy time, min	20 (18-23)	17 (15.25-19)	<0.001

Values are median (25^th/75^th percentile) or n (%).

LVEF - left ventricular ejection fraction; LVEDV - left ventricular end-diastolic volume; LVESV - left ventricular end-systolic volume; NYHA - New York Heart Association; proBNP - brain natriuretic peptide