To investigate the effect of insulin-glucose infusion on metabolic control and hypoglycemie episodes and its feasibility and safety in patients with diabetes and myocardial infarction (MI) compared with conventional treatment.
Of 327 patients with suspected acute MI, 158 were randomized to insulin-glucose infusion for at least 24 h and 169 received conventional therapy. We determined the 24-h blood glucose profile in the infusion group, the degree of metabolic control, hypoglycemie events, and in-hospital complications within the two study groups.
Blood glucose fell from 14.6 ± 2.9 to 9.2 ± 2.9 mM during the first 24 h in patients receiving insulin-glucose and from 15.8 ± 4.3 to 12.0 ± 4.4 mM in control patients (P < 0.01). Serum potassium decreased 0.21 ± 0.56 mM in the infusion group (P < 0.001) and 0.11 ± 0.59 mM in the control group (P < 0.05). The difference between the groups was not significant. Twenty-eight of the 158 patients developed an episode of hypoglycemia (blood glucose < 3.0 mM) during the insulin-glucose infusion. There were no significant differences in the number of episodes of ventricular tachyarrhythmias or in ischemie events between patients with and without hypoglycemia.
The protocol outlined in this study gives more rapid and better metabolic control than does conventional treatment. This treatment seems to be a feasible alternative for clinical attempts. Before it can be recommended for general use, the impact on mortality needs to be evaluated.