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P4569Differential prognostic impact of blood glucose levels at the acute stage of myocardial infarction according to HbA1c. The FAST-MI programme


 
 
 Hyperglycemia is a well-known prognostic marker in patients with acute myocardial infarction (AMI), associated with higher mortality compared with normoglycemia. Whether the prognostic impact of glycemic status at the acute stage of AMI is similar in patients with chronic dysglycemia has not been extensively explored.
 
 
 
 Using data from the nationwide French FAST-MI cohorts (2005, 2010 and 2015), we analysed the association between glycemia at entry and 30-day death, according to HbA1c level. From the 13,130 patients included, 5,452 had both glycemia and HbA1c assessed at entry. Of those, 1173 (21.5%) had an HbA1c ≥7%.
 
 
 
 In patients with HbA1c <7%, LVEF was inversely correlated with glycemic levels (55±11% for glycemia <100, 52±11% for glycemia 100–140, 50±12% for glycemia 140–160 and 49±12% for glycemia >180 mg/dl); a graded association between admission glycemia and 30-day mortality was observed, ranging from 0.7% in normoglycemic patients to 6.3% in patients with admission glycemia >180 mg/dl. In contrast, in patients with HbA1c ≥7%, LVEF was not correlated with glycemia (<100 mg/dl: 49±14%, >180 mg/dl 49±12%), and mortality was the highest in patients with normoglycemia (9.2%) and the lowest in patients with glycemia between 140 and 180 mg/dl (3.1%) (Figure). In multivariate analyses adjusting for baseline characteristics and early management, normoglycemia was associated with a decreased risk of 30-day mortality in patients with HbA1c <7% (HR 0.27, 95% confidence interval 0.10–0.73, P=0.01), while it was associated with a two-fold increase in mortality in patients with HbA1c ≥7% (HR 2.49, 95% confidence interval 1.02–6.09, P=0.046).
 Figure 1. 30-day death
 
 
 
 In AMI patients with high HbA1c levels on admission, normoglycemia is associated with higher early mortality than hyperglycemia. In contrast, a graded correlation is observed between admission glycemia and early mortality in patients with HbA1c <7%. Management of glycemia at the acute stage of MI might require different measures according to the initial HbA1c level.
 
 
 
 Amgen, AstraZeneca, Bayer, Daiichi-Sankyo, Eli-Lilly, GSK, MSD, Novartis, Pfizer, Sanofi, Servier
