Abstract: To evaluate ventricular function of patients after VVI pacing, 20 patients after VVI pacing and 19 controls were studied by gated cardiac blood pool imaging. There was no significant difference in the parameters of systolic function(LVEF?RVEF?LVPER?LV1/3EF?LV1/3ER)between VVI group and control group(P>0.05). There was no difference in the parameters of diastolic function(LVPFR?LV1/3FF)between the two groups either(P>0.05). LV1/3FR of the VVI group was significantly higher than that in the control group(P<0.05). The parameters of left ventricular systolic coordination(PS and LVPHSD)were significantly lower after VVI pacing than the control group(P<0.01). The results suggest that the left ventricular systolic coordination of patients after VVI pacing is lower and ventricular function remains stable.

Key words: cardiac pacing artificial, radionuclide imaging, ventricular function