cardiovascular AE vasodilatation AE a cardiovascular disorder AE which has an outcome of vasodilatation, which refers to the widening of blood vessels resulting from relaxation of smooth muscle cells within the vessel walls, particularly in the large arteries, smaller arterioles and large veins. WEB: http://en.wikipedia.org/wiki/Vasodilation SS, YH HPO: HP_0004927 SIDER: C0595862