Figure 3From: Effect of the effluent released from the canine internal mammary artery after intraluminal and extraluminal perfusion of acetylcholine and adenosine diphosphateEffect of the effluent from canine internal mammary artery on coronary artery endothelium-free ring. Relaxation of the coronary artery endothelium-free ring induced by the effluent released from canine internal mammary artery stimulated by intraluminal and extraluminal perfusion of acetylcholine (10-5 M) before (control) and after intraluminal and extraluminal pirenzepine (10-5 M). Values represent mean ± SEM; n = 6. Relaxation magnitude is expressed as % of initial tonus. * p < 0.05.Back to article page