Objective：To study the risk factors of pulmonary hypertension（PH）with supraventricular arrhythmias（SVA），and to improve the understanding of PH with SVA. Methods：The clinical data of 61 patients with PH admitted to the First Affiliated Hospital of NMU from January 2011 to December 2016 were retrospectively analyzed，and SVA was observed in 14 cases. Patients with SVA were included in the SVA group. Patients without SVA were included in the non-SVA group. The risk factors of SVA in PH were analyzed. Results：There were 14 patients in the SVA group，2 males and 12 females，with an average age of（49.21 ± 4.988）years. There were 47 patients in the non-SVA group，8 males and 39 females，with an average age of（38.02 ± 1.865）years. There were significant differences in the diameter of right atrium，the N-terminal pro B-type natriuretic peptide（NT-proBNP），ejection fraction of left ventricular，and age between two groups（P < 0.05）. Multiple factor analysis suggested that the diameter of the right atrium was significantly related to PH with SVA. At the end of follow-up，the mortality rate in the SVA group was 28.57%，and the median survival time was 66 months；the mortality rate in the non-SVA group was 27.66%，and the median survival time was 84 months. Conclusion：The diameter of right atrium was significantly related to SVA in patients with PH，and was seemed to be an independent predictor of SVA in patients with PH.