Assessment of hemodynamics in vertebral arteries in patients with atlantoaxial instability using functional tests

Abstract

Background. Hemodynamic disturbances in the vertebral arteries often lead to neurological imbalances. Assessing blood flow parameters in different parts of the vertebral arteries can help predict the development of serious neurological diseases and promptly carry out appropriate treatment and preventive measures. Purpose. To determine quantitative parameters of blood flow in the vertebral arteries in young people with atlantoaxial instability using functional tests in triplex mode. Materials and methods. In triplex mode, blood flow was recorded in the V2 and V3 segments of the vertebral arteries (VA) in 41 young patients. Maximum systolic velocity (Vs), end-diastolic velocity (Vd), resistive index (RI), pulsatility index (PI), and minute volume of blood flow (Vvol) were assessed. These hemodynamic parameters were measured in a straight head position during functional tests.
 Result. The RI value in the left VA was the highest in contralateral turning (CLT) of the head: 0.71±0.03, which is statistically (p