Dynamics of adreneractivity after transfer of myocardial infarction: annual observation

Aim. To study the change in the β-adrenergic reactivity of red blood cell membranes in patients during the first year after acute myocardial infarction.

Materials and methods. The study included 25 patients with acute myocardial infarction (AMI) who signed informed consent to participate in the study. The erythrocyte membrane β-adrenoreactivity index (β-ARM) was determined in venous blood samples upon admission to the intensive care unit, one day after admission, 6 and 12 months after the index MI was transferred using the BETA-ARM-AGAT reagent kit (Agat-Med, Russia).

Results. According to the results of dynamics assessment of β-APM during the first day, patients included in the study were divided into 2 groups. Group 1 (n=14) included patients who had an increase in β-APM in the first day, and group 2 (n=21) included patients in whom β-ARM either did not change or decreased. At the time of admission to the hospital in the formed groups, there were no differences in the β-APM index and clinical and anamnestic characteristics. A day after hospitalization, the value of β-APM in group 1 significantly exceeded the same indicator in group 2 (p=0.02). At the periods of 6 and 12 months, the β-APM indices in the groups did not differ. In the 2nd group of patients, the progression of chronic heart failure to one or more functional classes (NYHA) was significantly more often compared with the 1st group.

Conclusion. The study showed that on the first day in patients with AMI, both an increase and a decrease in the activity of the sympathoadrenal system are possible with a further leveling of these differences over the next year. For a group of patients with decreased activity of sympathoadrenal system on the first day, a more unfavorable course of heart failure in the post-infarction period is characteristic.