Acute endothelin A receptor antagonism improves pulmonary and systemic haemodynamics in patients with pulmonary arterial hypertension that is primary or autoimmune and related to congenital heart disease - Apostolopoulou, SC; Rammos, S; Kyriakides, ZS; Webb, DJ; Johnston, NR; Cokkinos, D.V.; Kremastinos, D Th (Heart, 2003)