MPO and angina pectoris: Similar findings were replicated in a cohort of patients with NSTE-ACS or stable angina, where MPO levels were considerably higher in subjects with PE compared to the other entities (PE: 685.9 ng/mL vs. PR: 340.0 ng/mL vs. stable angina: 272.5 ng/mL, p < 0.001) [48].