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Figure 1 Individual changes in muscle videointensity (y-axis) versus changes in minimal descending coronary cross-sectional area (x-axis) before and immediately after percutaneous transluminal coronary angioplasty (PTCA). The 95% confidence intervals (dashed lines) of the densitometric and quantitative angiographic reproducibility are also shown. Twenty-nine patients showed increased muscle videointensity (open circles) after PTCA (group A), while 24 did not (group B, unchanged videointensity, black circles), although the coronary cross-sectional areas of the two groups overlapped.
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