EXPRESS: Efficacy and Safety of Pulmonary Vasodilators in the Patients with Eisenmenger Syndrome: A Meta-analysis of Randomized Controlled Trials
Background: Few meta-analyses evaluated the efficacy and safety of pulmonary vasodilators in patients with Eisenmenger syndrome (ES). Recently, some studies have reported conflicting results regarding improvements in exercise capacity. This study evaluated the efficacy and safety of pulmonary vasodilators in patients with ES. Methods and Results: Relevant studies were identified by searching major databases. Pooled outcomes were used to assess the efficacy and safety of pulmonary vasodilators. In total, 5 studies with 508 patients were included. Meta-analysis indicated that the pulmonary vasodilators reduced the mortality (odd risk (OR) = 0.35; 95% CI, 0.13 to 0.95; P = 0.04), slashed the mean pulmonary artery pressure (mean difference (MD) = -4.35 mmHg; 95% CI, -7.19 to -1.50; P = 0.003), decreased pulmonary vascular resistance index (MD = -480.08 dyn·s·cm-5·m2; 95% CI, -753.51 to -206.64; P = 0.0006), increased the 6-minute walk distance (MD = 28.38 m; 95% CI, 2.99 to 53.77; P = 0.03), and elevated the systemic oxygen saturation at rest (MD = 1.00%; 95% CI, 0.12 to 1.88; P = 0.03). Pulmonary vasodilators were generally well tolerated. Conclusions: Pulmonary vasodilators decrease mortality and improve hemodynamics and exercise capacity in patients with ES. Overall, pulmonary vasodilators are well tolerated