Dynamics of structural and functional characteristics of the heart in patients after myocardial infarction with ST segment elevation as a marker of progression of chronic heart failure

Abstract

Objective. To identify the association of a number of clinical features and structural and functional characteristics of the heart with the progression of chronic heart failure (CHF) in patients one year after ST-segment elevation myocardial infarction (MI) (STEMI) with preserved and reduced left ventricular ejection fraction (EF) (LVEF).Design and methods. 120 patients with STEMI were included in a prospective study. During the study, all patients underwent an echocardiographic study using a Sonos 2500 device (Hewlett Packard, USA) on the 1st day (point I), on the 12th day (point II) of hospitalization, and also after 1 year (point III). Depending on the parameters of EF on the 1st day of the disease, the total sample of patients was divided into two: the 1st group — with preserved LVEF was represented by 86 (71,7 %), the 2nd group — with a reduced LVEF was represented by 34 (28,3 %) patients.Results. A total of 19 (15,8 %) adverse events were registered. In two cases, a fatal outcome (1,7 %) was recorded, the cause of which was repeated MI, in five (4,2 %) patients decompensation of СHF was noted, in eight (6,7 %) patients a clinic of progressive angina was traced, in four (3, 3 %) of patients were diagnosed recurrent MI. Deterioration of systolic and diastolic function was established one year after STEMI with preserved (≥ 50 %) LVEF: 17,6 % of patients began to correspond to the intermediate range of EF (40-49 %), the number of patients with diastolic dysfunction increased by 10 % compared to with acute study.Conclusions. Within a year after a STEMI with initially preserved LVEF, there is a deterioration in myocardial function in the form of a decrease in myocardial contractility and an increase in the number of patients with diastolic dysfunction.