“RESULTS In response to …(-7)M br dykinin, p orcine coronary artery rings treated with 1 x 10(-6), 1 … 10(-5) and 5 x 10(-5) g/L of pro gesterone sh owed a significant reduction in endothelium-dependent vasorelaxation by 36%, 45%, … 68%, respectively, as compared to controls (P <0.05).”