Both groups had low plasma H-FABP levels that were considered almost normal [28], although control patients had statistically higher levels than the CTEPH patients (CTEPH group, 3.53±2.55 ng/mL vs. control group, 4.95±2.38 ng/mL, p = 0.0018) (Figure 1). Here, FABP3 is linked to chronic thromboembolic pulmonary hypertension.