Abstract
Pulmonary artery hypertension associated with human immunodeficiency virus infection (PAH-HIV) is known to be caused by HIV infection. Antiretroviral therapy and PAH-specific drugs improve the prognosis of patients with PAH-HIV, but the pathophysiology of PAH-HIV remains unclear. We report a case of PAH-HIV treated with upfront combination therapy including subcutaneous injection of treprostinil. One year after treatment initiation, the patient's PAH improved significantly. However, it worsened over time due to reduced efficacy of subcutaneous injection of treprostinil. LEARNING OBJECTIVE: The etiology and pathophysiology of pulmonary artery hypertension associated with human immunodeficiency virus infection (PAH-HIV) remain unclear, and there are few case reports of PAH-HIV in Japan because the HIV prevalence is low. We encountered a case of PAH-HIV in which the efficacy of subcutaneous treprostinil injection was attenuated. It was unclear whether the reduced efficacy was associated with the pathophysiology of PAH-HIV. When PAH control deteriorates, early alteration of medication choice and administration route is important.