Pulmonary arterial hypertension is a disease that has a bad influence on the patient's prognosis. Recently, the possibility of therapy has dramatically changed. Nowadays, the treatment of this disease is concerned mainly with the pathophysiological target. In clinical practice, it is important to start therapy at the appropriate time, when the patient is qualified because of an unsatisfactory examination result or improve therapy when the patient is getting worse. The understanding of prognosis factors in pulmonary arterial hypertension is necessary, because it is used to determine the length of patients' life expectancy. In September of 2015, new guidelines of ESC concerning the diagnosis and treatment of pulmonary hypertension have been presented. In our article we centered on the prognosis factor in pulmonary arterial hypertension. This document is a continuation of ESC guidelines. Many of the most contemporary articles are here summarized.
Keywords: mortality; prognosis; pulmonary arterial hypertension; risk factor.