Could We Maintain the Initial Efficacy of Triple Sequential Combination Therapies with Selexipag Against Progressive Deterioration Risk in Patients with Pulmonary Arterial Hypertension: Insights from a Single-Center Study?
Abstract
Background: This study assessed the efficacy and tolerability of the oral prostacyclin receptor agonist selexipag as part of sequential triple combination therapy in patients with pulmonary arterial hypertension (PAH).
Methods: The study retrospectively analyzed 127 of 1160 PAH patients from a single-center registry who received sequential triple therapy including selexipag. Clinical, echocardiographic, and hemodynamic variables and multiparametric risk scores (MRS) were evaluated to assess changes in risk and outcomes.
Results: The mean age was 43.2 ± 16.4 years, and 84.3% were female. Prior to selexipag initiation, Comparative Prospective Registry of Newly Initiated Therapies for Pulmonary Hypertension 2.0 risk strata were: 15% first, 31.5% second, 44.1% third, and 9.4% fourth; European Society of Cardiology/European Respiratory Society low-, intermediate-, and high-risk rates were 20.5%, 61.4%, and 18.1%, respectively. Mean REVEAL Lite 2.0 score was 6.3 ± 2.7. Maximal selexipag dosing reached 1600 μg BID in 18.1% of patients, while 64.6% remained at ≤1000 μg BID. Patients were grouped into low-, intermediate-, and high-dose cohorts. Median follow-up was 727.5 days (interquartile range (IQR) 224-985). Selexipag was discontinued in 15% of patients. Across dosing cohorts, initial improvements in functional class, 6-minute walk distance, right ventricular and pulmonary echocardiographic parameters, and MRSs during the first year attenuated thereafter, except for N-terminal…
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