TABLE 2

Count Distribution and Heterogeneity of Myocardial Uptake for Both Gated SPECT Acquisitions

Parameter20 min4 hPaired t-test
Myocardial ROI
    Total count21,181 ± 5,72214,672 ± 3,841P < 0.0001
    Maximum count145 ± 29101 ± 20P < 0.0001
    Minimum count40 ± 1126 ± 8P < 0.0001
    Mean count84 ± 1857 ± 12P < 0.0001
    SD20 ± 514 ± 3P < 0.0001
    Skewness0.22 ± 0.260.23 ± 0.24NS
    Mean (x,y) gradient−0.30 ± 0.88−0.02 ± 0.48P < 0.001
Lung-to-heart ratio0.62 ± 0.170.58 ± 0.10P < 0.007

  • NS = not significant.

  • Data are expressed as mean ± SD.