In order to determine if both channels are also present and therefore potentially involved in the pathogenesis of vasculopathy, we stained sections from a coronary artery from a patient with atherosclerotic changes and from a mammary artery coronary artery bypass graft (CABG), both exhibiting pronounced intimal hyperplasia, for Kv1.3 and KCa3.1 (Figure 1A-D). This evidence concerns the gene KCNA3 and vascular disorder.