ST-elevation myocardial infarction in patients with type 2 diabetes mellitus. Influence of the SGLT2 inhibitor dapagliflozin

Background. Patients with type 2 diabetes mellitus (T2DM) have a 2-fold higher risk of deve­loping coronary heart disease and mortality than those without carbohydrate metabolism disturbances. The reason for such negative trends is the occurrence of metabolic stress due to hyperglycemia and insulin resistance, which causes disturbance in energy metabolism and ischemic damage to cardiomyocytes. The purpose of the study is to improve the effectiveness of rehabilitation treatment and assess the dynamics of quality of life in patients with ST-elevation myocardial infarction (STEMI) and T2DM who are at high risk of develo­ping cardiac complications during the inpatient treatment by including the sodium-glucose transport protein 2 (SGLT2) inhibitor dapagliflozin in the comprehensive therapy. Materials and methods. The study group consisted of 38 patients with STEMI and T2DM who received dapagliflozin in addition to percutaneous coronary intervention (PCI). The control group included 37 patients with STEMI and T2DM who received only standard protocol treatment after PCI. In addition to general clinical examinations and assessment of quality of life using the EuroQol Group EQ-5D-5L questionnaire (1990), echocardiography was performed to determine general and local myocardial contractility by the Simpson method; plasma levels of glucose, insulin were evaluated, and insulin resistance was determined by the HOMA-IR. Results. Patients with STEMI and T2DM after PCI most often developed reperfusion syndrome with left ventricular failure and rhythm disturbances. Under the influence of standard medical treatment, a significant clinical and functional improvement was observed, but postinfarction remodeling progressed with impaired systolic and diastolic function and the development of heart failure syndrome, as well as treatment-resistant atrial and ventricular fibrillation paroxysms, supraventricular and ventricular extrasystoles, and bundle branch block. In patients of the study group with STEMI and T2DM on the comprehensive treatment with the SGLT2 inhibitor dapagliflozin, a significant decrease in the frequency of rhythm and conduction disturbances was noted on the se­cond day of observation, as well as a decrease in postinfarction left ventricular remodeling, which ultimately manifested in a statistically significant improvement of myocardial contractility (ejection fraction increased by 6.7 %) and a decrease in diastolic dysfunction. There was also a significant decrease in the frequency and severity of reperfusion arrhythmias, which was achieved due to the cardiometabolic effect of the SGLT2 inhibitor dapagliflozin. Conclusions. The inclusion of the SGLT2 inhibitor dapagliflozin in the comprehensive treatment led to a significant improvement in central cardiac hemodynamic parameters and a decrease in the frequency and severity of reperfusion arrhythmias and acute left ventricular failure, which contributed to the improvement in quality of life.