IGFBP7 and heart failure: Cox regression analysis revealed that five biomarkers—ST2, angiopoietin‐2, atrial natriuretic factor, insulin‐like growth factor‐binding protein 7 (IGFBP7), and carbonic anhydrase 4 (CA4)—were significantly associated with the composite clinical endpoint of cardiovascular death, heart transplantation, left ventricular assist device implantation, and heart failure hospitalization.