PTX3 and chronic thromboembolic pulmonary hypertension: In the 49 CTEPH patients who underwent PEA, no correlation was observed between PTX3 levels and the Jamieson classification [type1 (n = 29), 5.39±2.67 ng/mL; type2 (n = 13), 6.60±9.09 ng/mL; type3 (n = 7), 5.69±2.53 ng/mL; type4 (n = 0), Steel-Dwass test.] [29].