The MPO test evaluates inflammation and cardiovascular risk by measuring the levels of this enzyme, which is involved in the immune response and oxidative stress. Elevated MPO levels can suggest an increased risk of cardiovascular events, such as heart attack and stroke, as well as chronic inflammatory conditions. Symptoms associated with high MPO levels may include cardiovascular symptoms like chest pain or shortness of breath. The test is useful for diagnosing and managing conditions related to inflammation and cardiovascular health.