Radial Artery Dilation Study: The Effect of Topical Administration of Nitroglycerin and Lidocaine Versus Lidocaine Alone of the Radial Artery Diameter

healthy, to determine if topical nitroglycerin acts to vasodilate the radial artery by a direct local action, or by systemic vasodilation, to determine if topical nitroglycerin dilates the radial artery in the presence of local anesthetic agents used in cardiac catheterization, interventional, phase1