COMPARATIVE ANALYSIS OF LEFT VENTRICULAR STRAIN PARAMETERS IN PATIENTS WITH HEART FAILURE OF ISCHEMIC AND NON-ISCHEMIC GENESIS
Aim. To carry out a comparative analysis of left ventricular (LV) strain parameters, determined by the two-dimensional strain imaging in patients with heart failure (HF) with LV ejection fraction (EF) ≤35%, depending on the origin of HF. Material and methods. The study included 133 patients with NYHA class 3-4 HF with LVEF ≤35%, taking optimal therapy. Based on the HF origin, 2 following groups of patients were formed: ischemic cardiomyopathy (ICM) (n=70), nonischemic cardiomyopathy (NICM) (n=63). All patients underwent speckle-tracking echocardiography. Results. All patients included in the study showed significant alterations in longitudinal strain parameters in most myocardial segments, most pronounced in the basal and middle parts of the LV. Comparative analysis of the peak systolic longitudinal strain showed the worst characteristics in patients with ICM were found in the apical segments (p=0,008), and in patients with NICM, in the basal segments of the LV (p=0,046). The studied groups had comparable LV global longitudinal and circumferential strain (p=0,26; p=0,67; respectively). Conclusion. Groups of patients with HF of ischemic and non-ischemic origin, despite comparable LVEF values, differ in the distribution of the decrease in local longitudinal strain of LV segments. The worst strain characteristics in patients with ICM and NICM are detected in LV apical and basal segments, respectively.