Primary cardiac hospitalizations in pulmonary arterial hypertension: Trends and outcomes from 2001 to 2014

•In a large U.S. database, 48.5% of PAH hospitalizations were for cardiac diagnoses.•From 2001 to 2014, there was a decrease in admissions in PAH for cardiac diagnoses.•The mortality in cardiac hospitalizations in PAH was 5.3% (vs. 6.8% in non-cardiac).•PAH admissions for cardiac diagnoses were associated with decreased risk of death.