treatment options for chronic thromboembolic pulmonary hypertension (ctepH) that is not amenable to thromboendarterectomy or is recurrent/persistent after thromboendarterectomy (inoperable CTEPH) include pulmonary vasodilators or balloon pulmonary angioplasty (BPA). We compared efficacy and safety outcomes of BpA with or without pulmonary vasodilators to pulmonary vasodilator therapy alone in patients with inoperable ctepH. observational and randomized trial data reporting outcomes for >5 patients with inoperable CTEPH were sought. Single-arm random effects meta-analyses were performed. The primary outcome was change in six-minute walk distance (6MWD). Secondary outcomes included safety; World Health organization functional class (WHo fc); and change in mean pulmonary arterial pressure (mpAp), pulmonary vascular resistance (pVR), and cardiac index. thirtyfour studies with 1604 patients were eligible for analyses. Both treatments resulted in significant improvement in 6MWD (71.0 meters, 95% CI: 47.4-94.5 meters with BPA versus 47.8 meters, 95% CI: 34.5-61.2 meters with pulmonary vasodilators), PVR [−3.1 Wood Units (WU), 95% CI: −4.9 to −1.4 WU versus −1.6 WU, 95% CI: −2.4 to −0.8 WU] and mPAP (−14.8 mmHg, 95% CI: −18.2 to −11.5 mmHg versus −4.9 mmHg, 95% CI: −6.9 to −2.8 mmHg). Cardiac index was similar and most patients were WHo fc ii and iii after their respective interventions. More complications occurred in the BpA arm. In conclusion, BPA and pulmonary vasodilators both improve 6MWD and hemodynamics in patients with inoperable CTEPH. While BPA may offer greater functional and hemodynamic improvements, this technique carries the accompanying risks of an invasive procedure. Chronic thromboembolic pulmonary hypertension (CTEPH) is characterized by macrovascular obstruction due to thromboemboli with an accompanying small vessel pulmonary arteriopathy 1. Pulmonary thromboendarterectomy is the gold standard treatment for CTEPH with numerous centers of excellence worldwide 2,3. However, over 40% of CTEPH patients are ineligible for pulmonary thromboendarterectomy, due to a combination of technical inaccessibility of thromboemboli, poor surgical candidacy, patient choice, or recurrent/persistent pulmonary hypertension after the operation 4,5. CTEPH patients who are not amenable to thromboendarterectomy, develop CTEPH recurrence after thromboendarterectomy, or have persistent CTEPH despite thromboendarterectomy (inoperable CTEPH) have worse outcomes than patients who successfully undergo operative intervention 6,7. In view of this, new treatments have emerged for this patient population. Balloon pulmonary angioplasty (BPA) is a percutaneous approach that employs sequential pulmonary artery angioplasty to relieve the macrovascular obstruction associated with CTEPH 6. This approach improves exercise capacity and hemodynamics 8. Furthermore, pulmonary vasodilators