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Rest Versus Stress Ejection Fraction on Gated Myocardial Perfusion SPECT

School of Clinical Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia

View larger version (17K): [in a new window]   FIGURE 1. Bivariate fit of rest EF and stress EF for matched pairs.

View larger version (16K): [in a new window]   FIGURE 2. Bland–Altman analysis of mean of stress/rest matched pairs vs. EF shows no trend toward under- or overestimation of stress EF. Mean stress EF was 56.3%, mean rest EF was 56.9%, and mean difference in EF indicated by solid horizontal line was –0.65%. Outer dashed lines represent 95% limits of agreement, whereas inner dotted lines represent 95% CI of EF difference.

View larger version (14K): [in a new window]   FIGURE 3. Bivariate fit of transient dilatation and EF demonstrates weak negative correlation suggesting negative EF may be associated with prolonged poststress transient dilatation.

View larger version (19K): [in a new window]   FIGURE 4. One-way ANOVA of transient dilatation by stress method demonstrating, despite small overlap of 95% CIs (diamonds), a statistically significant difference between mean transient dilatation for exercise stress and combined exercise/persantin compared with persantin stress (P = 0.02).

View larger version (19K): [in a new window]   FIGURE 5. One-way ANOVA of transient dilatation by scintigraphic findings demonstrating overlap of 95% CIs (diamonds) and no statistically significant difference between mean transient dilatation across scintigraphic findings (P = 0.07) despite the higher mean score of the reversible category.