Comparison of left ventricular dyssynchrony indices on Gated-SPECT in patients after MI and the control group Indices Patients after MI (n =106) Control group (n =34) p PSD 48.7 ± 19.49 17.5 ± 7.24 <0.05 HBW 154.9 ± 71.97 53.9 ± 15.14 <0.05 Peak 140.3 ± 33.14 135.6 ± 17.36 >0.05 HK 28.7 ± 20.88 23.1 ± 11.91 >0.05 HS 4.2 ± 1.46 4.1 ± 0.95 >0.05 10 The PSD and HBW indices of the patient group after MI are significantly higher than those of the control group.