The Gruppo Italiano per lo Studio della Sopravvivenza nell'Infarto Miocardico (GISSI) (Italian group for the study of the survival of myocardial infarction) is a cardiology research group founded as a collaboration between two Italian organisations â the Mario Negri Institute for Pharmacological Research and the Associazione Nazionale dei Medici Cardiologi Ospedalieri (ANMCO).
Four large-scale clinical trials (GISSI 1, GISSI 2, GISSI 3, GISSI Prevention) have involved over 60,000 people with acute myocardial infarction (AMI).