Objective:The study aims to characterize the hemodynamic classification of pulmonary hypertension (PH) in a series of patients undergoing to right heart catheterization. Methods: This is a retrospective study, we analyze the records of all right heart catheterizations performed between January 2017 and December 2018, all patients older than 18 years were included and those with incomplete or inconclusive data were excluded from the study. We identify three hemodynamic profiles according to the result of right heart catheterization. Results: 92 subjects were included and PH was ruled out in 4 of them; 26.1% were classified as precapillary, 31.8% postcapillary, and 42% as combined PH. There were no differences between the 3 groups in age or sex, pulmonary pressures were higher in the precapillary PH group, and right catheterization reclassified 35% of the patients in a hemodynamic group in a different from that expected. Precapillary PH was suspected in most of these cases, but the hemodynamic profiles found in heart catheterization corresponded to post-capillary or combined pulmonay hypertension. Conclusion: Right heart catheterization is necessary for the hemodynamic classification of PH, which is important not only for diagnosis but also for evaluating the etiology of the disease.