Click on image to view larger version.

Figure 1 Representative coronary angiograms demonstrating the vasoconstrictive response to intracoronary infusion of acetylcholine (Ach) 10^–4 mol/l obtained from the same animal. Column A = basal, column B = post-Ach, column C = after nitroglycerin. Top = percutaneous transluminal coronary angioplasty (PTCA) plus vehicle, Middle = PTCA alone, Lower = PTCA plus 17ß-estradiol groups, respectively. Arrows = PTCA sites.