The association of diabetes and admission blood glucose with 30-day mortality in patients with acute myocardial infarction complicated by cardiogenic shock

Background Cardiogenic shock is the leading cause of death in patients with acute myocardial infarction, with short-term mortality of approximately 50%. Whether diabetes mellitus and high blood glucose levels are associated with mortality in contemporary patients with acute myocardial infarction complicated by cardiogenic shock is inadequately described. Purpose To investigate if diabetes mellitus and high admission blood glucose were associated with 30-day mortality in a large, contemporary population with acute myocardial infarction complicated by cardiogenic shock. Methods Patients with acute myocardial infarction complicated by cardiogenic shock admitted at two tertiary centres in Denmark from 2010 to 2017 were individually identified through patient charts, resulting in the inclusion of 1716 cardiogenic shock patients. Glucose level at admission to the intensive care unit was available in 1302 patients. Results There was no significant difference in 30-day mortality between diabetes mellitus types I and II (63% vs. 62%, NS). Thirty-day mortality was significantly higher in diabetes patients compared to non-diabetes patients (62% vs. 50%, P < 0.001). Increasing admission glucose was associated with increasing 30-day mortality in a dose-dependent manner in diabetes mellitus (4-8 mmol/L, 41%; 8-12 mmol/L, 49%; 12-16 mmol/L, 63%; >16 mmol/L, 67%; P = 0.028) and non-diabetes patients (4-8 mmol/L, 32%; 8-12 mmol/L, 43%; 12-16 mmol/L, 57%; >16 mmol/l; 68%; P < 0.001). Conclusion Patients with acute myocardial infarction complicated by cardiogenic shock and concomitant diabetes mellitus type I or II had a significantly higher 30-day mortality in comparison to patients without diabetes mellitus, whereas no difference was found between diabetes mellitus types I and II. High glucose levels on admission to the intensive care unit were associated with increased 30-day mortality in diabetes mellitus and non-diabetes mellitus patients.