Effects of coronary artery aneurysms on intracoronary flow velocity dynamics in Kawasaki disease.

In coronary artery aneurysms associated with Kawasaki disease, a significant decrease in coronary flow velocity together with an abnormal flow profile and a reduction in coronary flow reserve were observed, and were significantly correlated with the size of the aneurysm. These results suggest that coronary arterial aneurysms impair coronary circulation.