COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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[Efficacy and safety of the use of metformin in patients with chronic heart failure and type 2 diabetes mellitus. results of the study "rational effective mulicomponent therapy in the battle against diabetes mellitus in patients with chronic heart failure"].

Aim of the investigation was to study safety of therapy with metformin and its effect on clinical, hemodynamic, functional and neurohumoral status in patients with chronic heart failure and type 2 diabetes mellitus DM). Eighty one patients with light and moderate NYHA functional class (FC) II-III CHF, left ventricular ejection fraction < 45%, and DM were examined. As a result of randomization 2 groups were formed: with active (n=41) and usual (n=40) treatment. In active group with achievement of target levels of glycemia 24 (59%) patients were on oral hypoglicemic drags, 17 (41) patients received. All patients were on basal therapy of CHF. Initially efficacy and safety of metformin was investigated in a cohort of active treatment (jn metformin n=29, control n=12), including patients who were prescribed metformin not for the whole period. In addition in active group analysis was carried out among patients, who continually were treated with metformin for 12 months (n=30) in comparison with patients never treated with metformin (n=8). Total duration of the period of treatment and supervision was 12 months. Control examination was conducted before randomization, after 6 months of treatment, at the end of the study and included assessment of clunico-functional status of patients, renal function (GFR), neurohumoral profile (MNUP, NA, AII). The state of carbohydrate metabolism was assessed with the help of determination of HBA1C level and test with nutritional load given as of common breakfast -- 2-3 in the course of which fasting and postprandial level (in 2 hours after breakfast) of glucose (GLC), and fasting insulin and C-peptide. Overall safety of metformin was confirmed -- throughout whole period of follow up with different variants of comparative analysis no cases of lactic acidosis were revealed. Practical lack of positive influence of metformin on glycemia at its initially not high level was accompanied with improvement of FC CHF, parameters of central hemodynamics, augmentation of functional capacities of patients, improvement of quality of life, lowering of number of decompensations of CHF and diminishment of degree of activation of SAS. It can be suggested that this dynamics is conditioned by the presence of cardioprotective properties in metformin what allows to recommend its application in patients with CHF and type 2 DM.

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