EDN1 and endothelial dysfunction: To detect vasomotor endothelial dysfunction in the coronary vessels in CHD patients, suffering (20 men and 2 woman, aged 60.5 [56.5; 63.0] years) and not suffering (15 men and 4 women, aged 65.0 [58.5; 67.0] years, p = 0.436) from ICMP, the ADMA and endothelin-1 concentrations in the blood from the coronary sinus were assessed.