Table 6

Minute-to-Minute and Day-to-Day Precision of SP and CFR by LV Quadrant

PET Stress SequenceAnterior Quadrant AverageInferior Quadrant AverageLateral Quadrant AverageSeptal Quadrant Average
ΔSDp ValueCOVΔSDp ValueCOVΔSDp ValueCOVΔSDp ValueCOV
8- to 15-min SP0.260.7011%0.270.6012%0.211.009%0.280.5012%
8- to 15-min CFR0.310.6011%0.320.9012%0.241.009%0.310.4012%
Day 1–day 2 SP0.500.5020%0.490.7022%0.490.4019%0.490.5021%
Day 1–day 2 CFR0.570.7021%0.490.5019%0.460.3018%0.520.2020%

Coefficient of variance (COV) = SD of differences/mean of the 2 measurements.

CFR = coronary flow reserve; LV = left ventricle; p = p value by paired Student t test; PET = positron emission tomography; ΔSD = standard deviation of the difference in paired PETs; SP = stress perfusion.