Effects of selective injection of contrast media on coronary artery diameter

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Abstract
The purpose of this study was to quantify the effect of Renografin‐76 on eplcardial coronary artery diameters, during selective coronary anglography. Using 105 mm‐photospot angiograms taken at 0,1, and 5 min, 99 coronary segments from ten patients were measured. Comparing the anglograms at 1 and 5 min to the control anglograms, a7 ± 7% and 6 ± 7% (both p = NS) change in diameter respectively was noted. Comparing the 1 and 5 min anglograms, there was no significant change (‐1 ± 7%). Measurements were found to be very reproducible. This study shows that there is a trend toward dilation of the coronary arteries during selective coronary anglography, but this did not reach statistical significance and probably is not clinically important.