Table 1.

The basic information of conventional two-dimensional doppler echocardiography between preoperative and postoperative ($\overline{x}\pm \mathrm{s}$)

	HR(bpm)	LVEDV(ml)	LVESV(ml)	SV(ml)	LVEF(%)
Preoperative	276 ± 44	1.61 ± 1.36	0.52 ± 0.19	1.09 ± 1.28	63 ± 9
Postoperative	241 ± 47	1.27 ± 0.43	0.57 ± 0.23	0.70 ± 0.26	55 ± 9
P Value	<0.001	0.119	0.248	0.057	<0.001

HR heart rate, LVEDV left ventricular end-diastolic volume, LVESV left ventricular end-systolic volume, SV stroke volume, LVEF left ventricular ejection fraction