Energeticheskaya sostavlyayushchaya i ob\"emnyykrovotok gemodinamiki v magistral'nykharteriyakh u bol'nykh khronicheskoy serdechnoynedostatochnost'yu pozhilogo vozrasta

Abstract

Summary. Background. There is no clear understanding of the value of minute volume of blood in distinct phases of blood flow and the total of its value in some of the main arteries. Energy component of the different phases of blood flow and pulse wave (PW) in elderly patients with chronic heart failure (CHF) remains poorly understood. Purpose. To study the redistribution of the blood flow volume and its energy component in the main arteries in aged patients with CHF. Materials and methods. In total 56 (48,2%) patients with CHF of I-II degree, of which 5 (8,9%) women aged between 63 and 87 (on average 76,60,9) years were included into the study. Patients were examined with the use of doppler scanning of the common carotid (CCA), brachial (BA) and femoral (FA) arteries, in which the diameter of the arteries, volumetric blood flow rate (Q, cm3/s), minute volume of blood (cm3/min), specific kinetic energy (hV, sm2/s2) blood flow and PW were determined. Results. In alderly patients with CHF Q (cm3/s), and minute blood volume (m3/min) in the CCA, and the PA are already in CHF of I degree much higher than their values in healthy subjects and further increased in CHF of II degree in all phases of blood flow. In BA these indices remained within the values of those in healthy individuals. Total minute volume of blood in 3 pairs of studied arteries in patients with CHF of I degree increased compared with healthy in 1,5 times and in patients with CHF of II degree in 2,1 times. In CHF blood volume in the CCA in the phase of rapid was increased, but hV of blood flow is not increased. In the CCA hV PW decreased more than 2 times in comparison with healthy people. Thus, hV of blood moving through the main vessels positively associated with the minute volume of blood and hV PW with extension velocity of the latter. Therefore in the CCA as the minute blood volume increases at the same time the energy component of Q, cm3/s and PW decrease that apparently reduces the possibility of damaging effect of an increased blood volume on the brain vessels.