Irene M Lang is a clinical cardiologist and Professor of Vascular Biology at the Medical University of Vienna. She has been nominated as one of the WMA–Caring Physicians of the World in 2005. She directs an out-patient clinic for pulmonary vascular diseases and is an active interventional and structural cardiologist. She also leads basic research on the biology of vascular occlusions, with a special focus on chronic thromboembolic pulmonary hypertension. Prof. Lang is a Member of the Austrian and European societies of cardiology, member of senate of the Medical University of Vienna and Editor for Pulmonary Circulation, the European Heart Journal and Atherosclerosis.