atients were examined by both the ECG-gated SPECT and planar imaging.It was found that ejection fractions（EF） of left ventricular measured by ECG SPECT imaging well correlated with that measured by planar imaging（r>0.7

P<0.0001）

but EF of right ventricular has no correlation（r<0.5

P>0.05）.However

the end-diastolic and end-systolic volume between left and right ventricular has significantly different（P<0.05）.The result showed that ECG-gated SPECT imaging can overcome the overlapping between atricles and ventricles

thereby it was beneficial for the detection of the lesions over the inferior and hasal portion of left and right ventricular.