Abstract
Systemic lupus erythematosus is associated with several forms of pulmonary hypertension. It can cause pulmonary hypertension through pulmonary thromboembolic disease, left heart disease and lung disease as well as causing an isolated pulmonary vasculopathy called pulmonary arterial hypertension. The true prevalence of pulmonary arterial hypertension in patients with lupus is not known but probably is no more than 1%. Currently, treatment for lupus-associated pulmonary arterial hypertension is with pulmonary vasodilators including phosphodiesterase-5 inhibitors, endothelin receptor antagonists and prostacyclin analogues, as it is for other causes of pulmonary arterial hypertension. Case series suggest there may be a special role for immunosuppression in this rare group of patients. We present two brief case histories and summarise our experience over 15 years. Prognosis is better in lupus-associated pulmonary arterial hypertension than in systemic sclerosis-associated pulmonary arterial hypertension, but unfortunately it remains a fatal condition in most patients.
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