The NIH IPAH registry from the 1980s showed an `` untreated '' median survival of 2 -- 3 years from time of diagnosis , with the cause of death usually being right ventricular failure ( cor pulmonale ) .
The NIH IPAH registry from the 1980 's showed an `` untreated '' median survival of 2-3 years from time of diagnosis , with the cause of death usually being right ventricular failure ( cor pulmonale ) .