AVP and acute myocardial infarction: In 2020, a retrospective study (157) analyzed 2,071 patients in the Copeptin Helps in the Early Detection of Patients with Acute Myocardial Infarction (CHOPIN) study and investigated the discrimination ability of several biomarkers, including cTnI, copeptin, and mid-regional pro-atrial natriuretic peptide (MR-pro-ANP).