Table 1.

Comparison of the pre- and post-operative TTE parameters.

Parameters	Before procedure	1 month after the procedure	3 months after the procedure	P ∗
NYHA score	3.2 ± 0.5	2.6 ± 0.6	2.4 ± 0.6	0.016
LVEDD (mm)	68.2 ± 12.3	64.4 ± 12.6	62.2 ± 11.3	0.017
LVEF (%)	32.0 ± 4.2	41.6 ± 7.5	45.0 ± 5.1	0.008
QRSd (ms)	158.0 ± 13.0	119.0 ± 7.6	120.0 ± 7.7	0.006

Data were presented as mean ± SD. ^∗Before procedure vs. 3 months after the procedure. LVEDD: Left ventricular end-diastolic dimension; LVEF: Left ventricular ejection fraction; NYHA: New York Heart Association; QRSd: QRS duration; TTE: Transthoracic echocardiogram.