Biomarker

Myoglobin is a protein that binds oxygen and iron. Myoglobin originates in myocytes and is released into circulation with any damage to muscle tissue, including myocardial necrosis.

An assay measuring N-terminal pro-BNP, or NT-proBNP, is more sensitive to detect heart failure and used in many institutions.

Cardiac enzymes ― also known as cardiac biomarkers ― include myoglobin, troponin and creatine kinase.